Journal articles: 'Weissella'

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Li, Yu Qin, Wen Li Tian, and Chun Tao Gu. "Weissella sagaensis sp. nov., isolated from traditional Chinese yogurt." International Journal of Systematic and Evolutionary Microbiology 70, no. 4 (April 1, 2020): 2485–92. http://dx.doi.org/10.1099/ijsem.0.004062.

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Three Gram-stain-positive bacterial strains, designated X0750T, X0278 and X0401, isolated from traditional yogurt in Tibet Autonomous Region, PR China, were characterized by a polyphasic approach, including sequence analyses of the 16S rRNA gene and three housekeeping genes (pheS, rpoA and recA), determination of average nucleotide identity (ANI) and average amino acid identity (AAI), in silico DNA–DNA hybridization (isDDH), fatty acid methyl ester (FAME) analysis and phenotypic characterization. Strain X0750T was phylogenetically related to the type strains of Weissella hellenica , Weissella bombi , Weissella paramesenteroides , Weissella jogaejeotgali , Weissella thailandensis , Weissella oryzae , Weissella cibaria and Weissella confusa , having 94.4–100 % 16S rRNA gene sequence similarities, 76.7–90.0 % pheS gene sequence similarities, 88.9–99.4 % rpoA gene sequence similarities and 77.6–92.8 % recA gene sequence similarities, respectively. ANI, isDDH and AAI values between strain X0750T and type strains of phylogenetically related species were less than 90.4, 40.9 and 92.8 % respectively, confirming that strain X0750T represents a novel species within the genus Weissella . Based upon the data obtained in the present study, a novel species, Weissella sagaensis sp. nov., is proposed and the type strain is X0750T(=NCIMB 15192T=CCM 8924T=LMG 31184T=CCTCC AB 2018403T).

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Vela, A. I., A. Fernández, Y. Bernaldo de Quirós, P. Herráez, L. Domínguez, and J. F. Fernández-Garayzábal. "Weissella ceti sp. nov., isolated from beaked whales (Mesoplodon bidens)." International Journal of Systematic and Evolutionary Microbiology 61, no. 11 (November 1, 2011): 2758–62. http://dx.doi.org/10.1099/ijs.0.028522-0.

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During an investigation into the microbiota of beaked whales (Mesoplodon bidens), nine isolates were obtained from different organs of four animals. The isolates were Gram-positive-staining, catalase-negative, short rod-shaped or coccoid organisms. A phylogenetic analysis based on 16S rRNA gene sequences of these isolates allocated them to the genus Weissella, showing 96.3 % and 96.0 % 16S rRNA gene sequence similarity with Weissella viridescens NRIC 1536Tand Weissella minor NRIC 1625T, respectively. On the basis of phenotypic, physiological and phylogenetic evidence, it is proposed that the new isolates from whales represent a novel species of the genus Weissella, Weissella ceti sp. nov. The type strain of Weissella ceti is 1119-1A-09T ( = CECT 7719T = CCUG 59653T).

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Lin, Shih-Ting, Li-Ting Wang, Yen-Chi Wu, Jia-Rong Jeremy Guu, Tomohiko Tamura, Koji Mori, Lina Huang, and Koichi Watanabe. "Weissella muntiaci sp. nov., isolated from faeces of Formosan barking deer (Muntiacus reevesi)." International Journal of Systematic and Evolutionary Microbiology 70, no. 3 (March 1, 2020): 1578–84. http://dx.doi.org/10.1099/ijsem.0.003937.

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A Gram-stain-positive strain, 8 H-2T, was isolated from faeces of Reeves’ muntjac (Muntiacus reevesi) barking deer in Taiwan. Cells of the strain were short rod-shaped, non-motile, non-haemolytic, asporogenous, facultatively anaerobic, heterofermentative and did not exhibit catalase and oxidase activities. Comparative analyses of 16S rRNA, pheS and dnaA gene sequences demonstrated that the novel strain was a member of the genus Weissella . On the basis of 16S rRNA gene sequence similarities, the type strains of Weissella oryzae (99.2 %), Weissella confusa (97.8 %), Weissella cibaria (97.6 %) and Weissella soli (97.3 %) were the closest neighbours to strain 8 H-2T. The concatenated housekeeping gene sequence (pheS and dnaA) similarities of 8 H-2T to closely related type strains were 72.5–84.9 %, respectively. The genomic DNA G+C content was 40.5 mol%. The average nucleotide identity and digital DNA–DNA hybridization values with these type strains were 70.2–75.4% and 25.1–30.1 %, respectively. Phenotypic and genotypic test results demonstrated that strain 8 H-2T represents a novel species belonging to the genus Weissella , for which the name Weissella muntiaci sp. nov. is proposed. The type strain is 8 H-2T (=BCRC 81133T=NBRC 113537T).

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Jamwal, Ashima, Gerlin Varghese, Deepika Sarawat, Nidhi Tejan, Sangram Singh Patel, and Chinmoy Sahu. "Characterization of Weissella Species during a 3-Year Observational Study – An Emerging Threat." American Journal of Tropical Medicine and Hygiene 110, no. 5 (May 1, 2024): 1006–9. http://dx.doi.org/10.4269/ajtmh.23-0713.

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ABSTRACT. Weissella species are mistaken for Lactobacillus or Leuconostoc because of their Gram-staining property and resistance to vancomycin. In this study, we aimed to evaluate the demographic pattern, presenting symptoms, risk factors, associated pathologies, and clinical outcomes in patients with Weissella infection. We also analyzed the antibiotic susceptibility pattern of the Weissella species isolated. This retrospective observational study was done from January 2021 to August 2023 in a tertiary care referral center in Uttar Pradesh. All Weissella species isolated from blood cultures or cerebrospinal fluid (CSF) samples during this period were included in the study. Twenty-four–hour growth from a positive blood culture or CSF sample was identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Demographic and clinical details of the patients were extracted from the hospital information system. Kirby-Bauer disk diffusion was used for antibiotic susceptibility testing. During the 3-year study, 13 isolates of Weissella species were identified in our laboratory. Among the patients, male predominance was seen. The age range of the patients was 5–53 years. The samples were blood samples (n = 11) and CSF samples (n = 2). Of these isolates, 12 (92.3%) were identified as Weissella confusa and 1 (7.69%) was identified as Weissella viridescens. Common risk factors were anemia, prolonged hospital stay, indwelling catheter, chemotherapy, and chronic kidney disease. All the isolates in this study were sensitive to amikacin, daptomycin, amoxicillin-clavulanate, minocycline, and linezolid. Death was attributed to Weissella infection in three patients. Weissella species are opportunistic organisms that need to be identified quickly and precisely to guarantee the right course of treatment.

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Apostolakos, Ilias, Spiros Paramithiotis, and Marios Mataragas. "Functional and Safety Characterization of Weissella paramesenteroides Strains Isolated from Dairy Products through Whole-Genome Sequencing and Comparative Genomics." Dairy 3, no. 4 (November 11, 2022): 799–813. http://dx.doi.org/10.3390/dairy3040055.

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Strains belonging to the Weissella genus are frequently recovered from spontaneously fermented foods. Their functional, microbial-modulating, and probiotic traits enhance not only the sensorial properties but also the nutritional value, beneficial effects, and safety of fermented products. Sporadic cases of opportunistic pathogenicity and antibiotic resistance have deprived safety status from all Weissella species, which thus remain understudied. Our study increased the number of available high-quality and taxonomically accurate W. paramesenteroides genomes by 25% (9 genomes reported, leading to a total of 36 genomes). We conducted a phylogenetic and comparative genomic analysis of the most dominant Weissella species (W. cibaria, W. paramesenteroides, W. viridescens, W. soli, W. koreensis, W. hellenica and W. thailadensis). The phylogenetic tree corroborated species assignment but also revealed phylogenetic diversity within the Weissella species, which is likely related to the adaptation of Weissella in different niches. Using robust alignment criteria, we showed the overall absence of resistance and virulence genes in Weissella spp., except for one W. cibaria isolate carrying blaTEM-181. Enrichment analysis showed the association of Weissella species several CAZymes, which are essential for biotechnological applications. Additionally, the combination of CAZyme metabolites with probiotics can potentially lead to beneficial effects for hosts, such as the inhibition of inflammatory processes and the reduction of cholesterol levels. Bacteriocins and mobile genetic elements MGEs (Inc11 plasmid and ISS1N insertion sequence) were less abundant, however W. thailadensis and W. viridescens showed significant association with specific bacteriocin-encoding genes. Lastly, an analysis of phenotypic traits underlined the need to carefully evaluate W. cibaria strains before use as food additives and suggested the possibility of employing W. paramesenteroides and W. hellenica in the fermentation process of vegetable products. More studies providing high-resolution characterization of Weissella strains from various sources are necessary to elucidate the safety of Weissella spp. and exploit their beneficial characteristics.

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Quattrini, M., D. Korcari, G. Ricci, and M. G. Fortina. "A polyphasic approach to characterize Weissella cibaria and Weissella confusa strains." Journal of Applied Microbiology 128, no. 2 (October 25, 2019): 500–512. http://dx.doi.org/10.1111/jam.14483.

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Tohno, Masanori, Maki Kitahara, Hidehiko Inoue, Ryuichi Uegaki, Tomohiro Irisawa, Moriya Ohkuma, and Kiyoshi Tajima. "Weissella oryzae sp. nov., isolated from fermented rice grains." International Journal of Systematic and Evolutionary Microbiology 63, Pt_4 (April 1, 2013): 1417–20. http://dx.doi.org/10.1099/ijs.0.043612-0.

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A taxonomic study was conducted on two Gram-reaction-positive, catalase-negative, irregular short-rod-shaped or coccoid lactic acid bacteria, designated strains SG25T and SG23, that were isolated from grains of fermented Japanese rice (Oryza sativa L. subsp. japonica). A phylogenetic analysis based on 16S rRNA gene sequence data clearly showed that the strains belonged to the genus Weissella and were most closely related to Weissella soli LMG 20113T (with a sequence similarity of 96.9 % for each novel strain). The peptidoglycan of each strain contained the amino acids glutamic acid, lysine, serine and alanine in a molar ratio of 1.0 : 1.2 : 0.5 : 3.0, respectively. On the basis of the unusual phenotypic characteristics of the novel strains and the low levels of DNA–DNA relatedness recorded between each novel strain and Weissella soli JCM 12536T, strains SG25T and SG23 represent a single novel species in the genus Weissella , for which the name Weissella oryzae sp. nov. is proposed. The type strain is SG25T ( = JCM 18191T = DSM 25784T).

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Oh, Sei Joon, Na-Ri Shin, Dong-Wook Hyun, Pil Soo Kim, Joon Yong Kim, Min-Soo Kim, Ji-Hyun Yun, and Jin-Woo Bae. "Weissella diestrammenae sp. nov., isolated from the gut of a camel cricket (Diestrammena coreana)." International Journal of Systematic and Evolutionary Microbiology 63, Pt_8 (August 1, 2013): 2951–56. http://dx.doi.org/10.1099/ijs.0.047548-0.

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A novel, Gram-stain-positive, non-motile, facultatively anaerobic, rod- or coccoid-shaped bacterium, designated strain ORY33T, was isolated from the gut of a camel cricket (Diestrammena coreana). The 16S rRNA gene sequence analysis showed that strain ORY33T belonged to the genus Weissella , with highest sequence similarity to Weissella koreensis S-5623T (97.7 %). The strain grew optimally at 30 °C and pH 7 in the presence of 0 % (w/v) NaCl. Catalase and oxidase activities were negative. The genomic DNA G+C content of strain ORY33T was 45.1 mol%. DNA–DNA hybridization values between strain ORY33T and closely related members of the genus Weissella were less than 27 %. The major fatty acids of strain ORY33T were C18 : 1ω9c, C16 : 0 and C14 : 0. Based on these phenotypic, phylogenetic and genotypic analyses, strain ORY33T represents a novel species belonging to the genus Weissella , for which the name Weissella diestrammenae sp. nov. is proposed. The type strain is ORY33T ( = KACC 16890T = JCM 18559T).

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Lee, Se-Hui, Hye-Jin Ku, Min-Ju Ahn, Ji-Sang Hong, Se Hee Lee, Hakdong Shin, Keun Chul Lee, et al. "Weissella jogaejeotgali sp. nov., isolated from jogae jeotgal, a traditional Korean fermented seafood." International Journal of Systematic and Evolutionary Microbiology 65, Pt_12 (December 1, 2015): 4674–81. http://dx.doi.org/10.1099/ijsem.0.000631.

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Strain FOL01T was isolated from traditionally fermented Korean jogae jeotgal (fermented clams). Phylogenetic sequence analysis of the 16S rRNA gene from FOL01T revealed that it is closely related to Weissella thailandensis FS61-1T and Weissella paramesenteroides ATCC 33313T with 99.39 % and 98.50 % 16S rRNA gene sequence similarities, respectively. API and VITEK analyses showed that strain FOL01T could be separated from its nearest phylogenetic relatives with respect to carbohydrate fermentation and antibiotic resistance. Subsequent amplified rRNA gene restriction analysis of 16S rRNA genes and HaeIII-restriction enzyme profiling of genomic DNAs revealed different band patterns. In addition, DNA–DNA hybridization of genomic DNAs showed 63.9 % relatedness. Analysis of the composition of cellular fatty acids confirmed that strain FOL01T differs from its close relatives and supports the proposal to assign this organism to a novel species of the genus Weissella. Based on these results, strain FOL01T could be classified as a novel species of the genus Weissella, for which the name Weissella jogaejeotgali sp. nov. is proposed. The type strain is FOL01T ( = KCCM 43128T = JCM 30589T).

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De Bruyne, Katrien, Nicholas Camu, Luc De Vuyst, and Peter Vandamme. "Weissella fabaria sp. nov., from a Ghanaian cocoa fermentation." International Journal of Systematic and Evolutionary Microbiology 60, no. 9 (September 1, 2010): 1999–2005. http://dx.doi.org/10.1099/ijs.0.019323-0.

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Two lactic acid bacteria, strains 257T and 252, were isolated from traditional heap fermentations of Ghanaian cocoa beans. 16S rRNA gene sequence analysis of these strains allocated them to the genus Weissella, showing 99.5 % 16S rRNA gene sequence similarity towards Weissella ghanensis LMG 24286T. Whole-cell protein electrophoresis, fluorescent amplified fragment length polymorphism fingerprinting of whole genomes and biochemical tests confirmed their unique taxonomic position. DNA–DNA hybridization experiments towards their nearest phylogenetic neighbour demonstrated that the two strains represent a novel species, for which we propose the name Weissella fabaria sp. nov., with strain 257T (=LMG 24289T =DSM 21416T) as the type strain. Additional sequence analysis using pheS gene sequences proved useful for identification of all Weissella–Leuconostoc–Oenococcus species and for the recognition of the novel species.

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Samelis, John, John Rementzis, Effie Tsakalidou, and John Metaxopoulos. "Usefulness of Rapid GC Analysis of Cellular Fatty Acids for Distinguishing Weissella viridescens, Weissella paramesenteroides, Weissella hellenica and some Non-identifiable, Arginine-negative Weissella Strains of Meat Origin." Systematic and Applied Microbiology 21, no. 2 (June 1998): 260–65. http://dx.doi.org/10.1016/s0723-2020(98)80031-3.

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Rambitan, Grisella, Johanis J. Pelealu, and Trina E. Tallei. "Isolasi dan identifikasi bakteri asam laktat hasil fermentasi kol merah (Brassica oleracea L.) sebagai probiotik potensial (Isolation and identification lactic acid bacteria from red cabbage (Brassica oleracea L.) fermentation as potential probiotic)." JURNAL BIOS LOGOS 8, no. 2 (August 31, 2018): 33. http://dx.doi.org/10.35799/jbl.8.2.2018.21447.

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AbstrakBakteri asam laktat merupakan kelompok bakteri yang menghasilkan asam laktat sebagai produk utama dalam fermentasi. Bakteri ini sering disebut probiotik sebab memberikan dampak positif bagi tubuh manusia. Setiap spesies bakteri asam laktat memiliki efek probiotik yang berbeda-beda sehingga diperlukan seleksi dan identifikasi untuk mendapatkan strain probiotik yang baik. Identifikasi bakteri asam laktat dalam penelitian ini menggunakan metode identifikasi molekuler dengan gen penanda 16S rRNA. Bakteri asam laktat dari fermentasi kol merah memiliki kemiripan 100% dengan Weissella cibaria dan Weissella confusa. Analisis filogenetik menunjukkan hubungan kekerabatan antara isolat bakteri asam laktat dari fermentasi kol merah dengan bakteri genus Weissella yang lain.Kata kunci: bakteri asam laktat, fermentasi, 16S rRNA, probiotik AbstractLactic acid bacteria is a group of bacteria that produce lactic acid as the main product in fermentation. These bacteria are often called probiotics because can confer a positive impact on the human body. Each species of lactic acid bacteria has a different probiotic effect that requires selection and identification to obtain a good probiotic strain. The identification of lactic acid bacteria in this study used a method of molecular identification with a marker gene of 16S rRNA. Lactic acid bacteria from red cabbage fermentation have a 100% similarity to Weissella cibaria and Weissella confusa. Phylogenetic analysis showed a relationship between lactic acid bacteria isolates from red cabbage fermentation with bacteria from the other Weissella genus.Keywords: lactic acid bacteria, fermentation, 16S rRNA, probiotics

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D.K, Nurmuhamedova. "MAHALLIY SUT ACHITUVCHI BAKTERIYALARNING ANTIMIKROB VA BAKTERIOSINOGEN FAOLLIGINI TADQIQ ETISH." 2016-yil, 1-son (95) ANIQ VA TABIIY FANLAR SERIYASI 1, no. 95 (August 25, 2023): 1–12. http://dx.doi.org/10.59251/2181-1296.2023.v3.139.2.2268.

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Maqolada laktobakteriya shtammlarining shartli-patogen izolyatlarga nisbatan antimikrob hamda bakteriotsinogen faolligi bo'yicha tadqiqot natijalari keltirilgan. Mahalliy sut mahsulotlari va ona suti bilan oziqlanadigan chaqaloqlarning ahlat na'munasidan sut achituvchi 28 ta bakteriyalar ajratildi va antimikrob faolikka skrining qilindi, ularning probiotik xususiyatlari o'rganildi. Аjratilgan sut achituvchi bakteriyalarning 28 ta izolyatlaridan 7 ta shtamm tanlab olindi. Tanlangan shtammlar klinik izolatlarga nisbatan yuqori mikroblarga qarshi faol zona namoyon etdi. Sut achituvchi bakteriyalar orasidan Weissella cibaria WC-1, Weissella cibaria WC-2, Weissella viridescens WV hamda Lactobacillus plantarum C-2 shtammlarini Bacillus subtilis bakteriyasiga nisbatan bakteriotsinogen moddasi mavjudligi aniqlandi.

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Kim, Eiseul, Seung-Min Yang, Dae-Hyun Jung, and Hae-Yeong Kim. "Differentiation between Weissella cibaria and Weissella confusa Using Machine-Learning-Combined MALDI-TOF MS." International Journal of Molecular Sciences 24, no. 13 (July 2, 2023): 11009. http://dx.doi.org/10.3390/ijms241311009.

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Although Weissella cibaria and W. confusa are essential food-fermenting bacteria, they are also opportunistic pathogens. Despite these species being commercially crucial, their taxonomy is still based on inaccurate identification methods. In this study, we present a novel approach for identifying two important Weissella species, W. cibaria and W. confusa, by combining matrix-assisted laser desorption/ionization and time-of-flight mass spectrometer (MALDI-TOF MS) data using machine-learning techniques. After on- and off-plate protein extraction, we observed that the BioTyper database misidentified or could not differentiate Weissella species. Although Weissella species exhibited very similar protein profiles, these species can be differentiated on the basis of the results of a statistical analysis. To classify W. cibaria, W. confusa, and non-target Weissella species, machine learning was used for 167 spectra, which led to the listing of potential species-specific mass-to-charge (m/z) loci. Machine-learning techniques including artificial neural networks, principal component analysis combined with the K-nearest neighbor, support vector machine (SVM), and random forest were used. The model that applied the Radial Basis Function kernel algorithm in SVM achieved classification accuracy of 1.0 for training and test sets. The combination of MALDI-TOF MS and machine learning can efficiently classify closely-related species, enabling accurate microbial identification.

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Ahmed, Sadia, Sargun Singh, Vaidhvi Singh, Kyle D. Roberts, Arsalan Zaidi, and Alexander Rodriguez-Palacios. "The Weissella Genus: Clinically Treatable Bacteria with Antimicrobial/Probiotic Effects on Inflammation and Cancer." Microorganisms 10, no. 12 (December 7, 2022): 2427. http://dx.doi.org/10.3390/microorganisms10122427.

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Weissella is a genus earlier considered a member of the family Leuconostocaceae, which was reclassified into the family Lactobacillaceae in 1993. Recently, there have been studies emphasizing the probiotic and anti-inflammatory potential of various species of Weissella, of which W. confusa and W. cibaria are the most representative. Other species within this genus include: W. paramesenteroides, W. viridescens, W. halotolerans, W. minor, W. kandleri, W. soli, W. ghanensis, W. hellenica, W. thailandensis, W. fabalis, W. cryptocerci, W. koreensis, W. beninensis, W. fabaria, W. oryzae, W. ceti, W. uvarum, W. bombi, W. sagaensis, W. kimchi, W. muntiaci, W. jogaejeotgali, W. coleopterorum, W. hanii, W. salipiscis, and W. diestrammenae. Weissella confusa, W. paramesenteroides, W. koreensis, and W. cibaria are among the few species that have been isolated from human samples, although the identification of these and other species is possible using metagenomics, as we have shown for inflammatory bowel disease (IBD) and healthy controls. We were able to isolate Weissella in gut-associated bacteria (post 24 h food deprivation and laxatives). Other sources of isolation include fermented food, soil, and skin/gut/saliva of insects/animals. With the potential for hospital and industrial applications, there is a concern about possible infections. Herein, we present the current applications of Weissella on its antimicrobial and anti-inflammatory mechanistic effects, the predisposing factors (e.g., vancomycin) for pathogenicity in humans, and the antimicrobials used in patients. To address the medical concerns, we examined 28 case reports focused on W. confusa and found that 78.5% of infections were bacteremia (of which 7 were fatal; 1 for lack of treatment), 8 were associated with underlying malignancies, and 8 with gastrointestinal procedures/diseases of which 2 were Crohn’s disease patients. In cases of a successful resolution, commonly administered antibiotics included: cephalosporin, ampicillin, piperacillin-tazobactam, and daptomycin. Despite reports of Weissella-related infections, the evolving mechanistic findings suggest that Weissella are clinically treatable bacteria with emerging antimicrobial and probiotic benefits ranging from oral health, skin care, obesity, and inflammatory diseases to cancer.

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Fanelli, Francesca, Marco Montemurro, Daniele Chieffi, Gyu-Sung Cho, Hui-Zhi Low, Frank Hille, Charles M. A. P. Franz, and Vincenzina Fusco. "Motility in Periweissella Species: Genomic and Phenotypic Characterization and Update on Motility in Lactobacillaceae." Microorganisms 11, no. 12 (December 5, 2023): 2923. http://dx.doi.org/10.3390/microorganisms11122923.

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The genus Weissella and the recently described genus Periweissella, to which some previously named Weissella species have been reclassified as a result of a taxogenomic assessment, includes lactic acid bacteria species with high biotechnological and probiotic potential. Only one species, namely, Periweissella (P.) beninensis, whose type strain has been shown to possess probiotic features, has so far been described to be motile. However, the availability of numerous genome sequences of Weissella and Periweissella species prompted the possibility to screen for the presence of the genetic determinants encoding motility in Weissella and Periweissellas spp. other than P. beninensis. Herein, we performed a comprehensive genomic analysis to identify motility-related proteins in all Weissella and Periweissella species described so far, and extended the analysis to the recently sequenced Lactobacillaceae spp. Furthermore, we performed motility assays and transmission electron microscopy (TEM) on Periweissella type strains to confirm the genomic prediction. The homology-based analysis revealed genes coding for motility proteins only in the type strains of P. beninensis, P. fabalis, P. fabaria and P. ghanensis genomes. However, only the P. beninensis type strain was positive in the motility assay and displayed run-and-tumble behavior. Many peritrichous and long flagella on bacterial cells were visualized via TEM, as well. As for the Lactobacillaceae, in addition to the species previously described to harbor motility proteins, the genetic determinants of motility were also found in the genomes of the type strains of Lactobacillus rogosae and Ligilactobacillus salitolerans. This study, which is one of the first to analyze the genomes of Weissella, Periweissella and the recently sequenced Lactobacillaceae spp. for the presence of genes coding for motility proteins and which assesses the associated motility phenotypes, provides novel results that expand knowledge on these genera and are useful in the further characterization of lactic acid bacteria.

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Cheaito, Rola A., Ghassan Awar, Maria Alkozah, Mohamad Ali Cheaito, and Imad El Majzoub. "Meningitis due to Weissella Confusa." American Journal of Emergency Medicine 38, no. 6 (June 2020): 1298.e1–1298.e3. http://dx.doi.org/10.1016/j.ajem.2020.02.004.

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Gelfand, Michael S., and Kerry O. Cleveland. "Confused by Weissella confusa Bacteremia." Journal of Clinical Microbiology 53, no. 6 (May 14, 2015): 2001. http://dx.doi.org/10.1128/jcm.00509-15.

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Kwak, Min-Jung, Seon-Bin Choi, Byung-Yong Kim, and Jongsik Chun. "Genome-based reclassification of Weissella jogaejeotgali as a later heterotypic synonym of Weissella thailandensis." International Journal of Systematic and Evolutionary Microbiology 69, no. 12 (December 1, 2019): 3672–75. http://dx.doi.org/10.1099/ijsem.0.003315.

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Nisiotou, Aspasia, Dimitra Dourou, Maria-Evangelia Filippousi, Georgios Banilas, and Chrysoula Tassou. "Weissella uvarum sp. nov., isolated from wine grapes." International Journal of Systematic and Evolutionary Microbiology 64, Pt_11 (November 1, 2014): 3885–90. http://dx.doi.org/10.1099/ijs.0.066209-0.

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Two bacterial strains (B18BM42T and B18NM6) were recovered during a study of bacterial diversity on wine grapes (Vitis vinifera L.) from the Nemea region in Greece. Phylogenetic analysis based on 16S rRNA gene sequences placed the two strains within the genus Weissella , and found them to be most closely related to Weissella minor NRIC 1625T followed by Weissella viridescens NRIC 1536T (99.1 and 98.9 % sequence similarity, respectively). The level of DNA–DNA relatedness between strains B18NM42T and W. minor NRIC 1625T or W. viridescens NRIC 1536T was 31.9 and 35.0 %, respectively. The two novel strains could be genetically differentiated from their closest relatives by REA-PFGE (restriction enzyme analysis-pulse field gel electrophoresis), RAPD (randomly amplified polymorphic DNA) and rep-PC R analyses (repetitive sequence-based PCR). Physiological examination showed that the novel strains can be distinguished from phylogenetically related species by their ability to grow at 42 °C and by certain carbohydrate fermentations. Based on the evidence above, the affiliation of the two strains to a novel species with the proposed name Weissella uvarum sp. nov. is suggested. The type strain is B18NM42T ( = DSM 28060T = NCCB 100484T).

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Kim, Jeong-Sun, Eun-Young Hwang, Sang-Won Choi, and Jae-Yong Park. "Preparation of Fermented Mulberry Beverage by Weissella cibaria." Current Topic in Lactic Acid Bacteria and Probiotics 2, no. 1 (January 2014): 38–44. http://dx.doi.org/10.35732/ctlabp.2014.2.1.38.

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Chelo, Ivo M., Líbia Zé-Zé, and Rogério Tenreiro. "Genome diversity in the genera Fructobacillus, Leuconostoc and Weissella determined by physical and genetic mapping." Microbiology 156, no. 2 (February 1, 2010): 420–30. http://dx.doi.org/10.1099/mic.0.028308-0.

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Pulsed-field gel electrophoresis analysis of chromosomal single and double restriction profiles of 17 strains belonging to three genera of ‘Leuconostocaceae’ was done, resulting in physical and genetic maps for three Fructobacillus, six Leuconostoc and four Weissella strains. AscI, I-CeuI, NotI and SfiI restriction enzymes were used together with Southern hybridization of selected probes to provide an assessment of genomic organization in different species. Estimated genome sizes varied from 1408 kb to 1547 kb in Fructobacillus, from 1644 kb to 2133 kb in Leuconostoc and from 1371 kb to 2197 kb in Weissella. Other genomic characteristics of interest were analysed, such as oriC and terC localization and rrn operon organization. The latter seems markedly different in Weissella, in both number and disposition in the chromosome. Comparisons of intra- and intergeneric features are discussed in the light of chromosome rearrangements and genomic evolution.

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Lakra, Avinash Kant, Latha Domdi, Gagan Hanjon, Younus Mohd Tilwani, and Venkatesan Arul. "Some probiotic potential of Weissella confusa MD1 and Weissella cibaria MD2 isolated from fermented batter." LWT 125 (May 2020): 109261. http://dx.doi.org/10.1016/j.lwt.2020.109261.

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Teixeira, Camila Gonçalves, Raiane Rodrigues da Silva, Andressa Fusieger, Evandro Martins, Rosângela de Freitas, and Antônio Fernandes de Carvalho. "O gênero Weissella na indústria de alimentos: Uma revisão." Research, Society and Development 10, no. 5 (April 28, 2021): e8310514557. http://dx.doi.org/10.33448/rsd-v10i5.14557.

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O gênero Weissella é composto por bactérias classificadas como Gram-positivas, catalase negativas, não formadoras de esporos, morfologia cocóide ou bacilos curtos. Pertencem ao grupo das bactérias lácticas (BAL), principalmente pela produção de ácido láctico a partir da fermentação de carboidratos. As espécies de Weissella estão distribuídas em diferentes habitats, como solos, ordenhadeiras, cana-de-açúcar e algumas cepas com características tecnológicas interessantes podem ser isoladas de alimentos fermentados, como queijos de leite cru, vegetais fermentados e leite fermentado. Do ponto de vista da tecnologia de alimentos, algumas cepas apresentam potencial na produção de exopolissacarídeos, oligossacarídeos não digeríveis, que está além de seu potencial probiótico. Portanto, as bactérias pertencentes ao gênero Weissella podem ter grande importância tecnológica, estando também envolvidas no controle de doenças de origem alimentar pela produção de bacteriocinas e peróxido de hidrogênio. Este gênero possui grande potencial para uso na indústria alimentícia.

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Padonou, Sègla Wilfrid, Ulrich Schillinger, Dennis S. Nielsen, Charles M. A. P. Franz, Michael Hansen, Joseph D. Hounhouigan, Mathurin C. Nago, and Mogens Jakobsen. "Weissella beninensis sp. nov., a motile lactic acid bacterium from submerged cassava fermentations, and emended description of the genus Weissella." International Journal of Systematic and Evolutionary Microbiology 60, no. 9 (September 1, 2010): 2193–98. http://dx.doi.org/10.1099/ijs.0.014332-0.

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Four Gram-positive, catalase-negative, short rod-shaped or coccoid, heterofermentative lactic acid bacterial strains (2L24P13T, 1L48P15, 1L24P31 and 1L24P34) with unusual phenotypic and genotypic properties were isolated from submerged fermenting cassava on MRS agar. All strains were motile, grew at 15 °C, produced dl-lactic acid from glucose with gas formation and produced ammonia from arginine. Acid was produced from d-fructose, d-galactose, d-glucose, lactose, maltose, d-mannose, melibiose, d-raffinose, sucrose, N-acetylglucosamine and d-mannitol, but not from d-arabinose or xylose. 16S rRNA gene sequence analysis revealed that the strains belonged to the genus Weissella and were most closely related to Weissella ghanensis LMG 24286T . Low DNA−DNA reassociation values were obtained between the isolates and W. ghanensis DSM 19935T. Based on the genetic and phenotypic results, the strains are considered to represent a novel species, for which the name Weissella beninensis sp. nov. is proposed. The type strain is 2L24P13T (=DSM 22752T=LMG 25373T).

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Vela, Ana I., Concepción Porrero, Joaquín Goyache, Ana Nieto, Belen Sánchez, Víctor Briones, Miguel Angel Moreno, Lucas Domínguez, and José F. Fernández-Garayzábal. "Weissella confusaInfection in Primate (Cercopithecus mona)." Emerging Infectious Diseases 9, no. 10 (October 2003): 1307–9. http://dx.doi.org/10.3201/eid0910.020667.

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Lawhon, Sara D., Franklin R. Lopez, Amanda Joswig, Hannah C. Black, Ashlee E. Watts, Tracy E. Norman, and Brian F. Porter. "Weissella confusa septicemia in a foal." Journal of Veterinary Diagnostic Investigation 26, no. 1 (December 10, 2013): 150–53. http://dx.doi.org/10.1177/1040638713510516.

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Rizzello, Carlo G., Rossana Coda, Yaqin Wang, Michela Verni, Ilkka Kajala, Kati Katina, and Arja Laitila. "Characterization of indigenous Pediococcus pentosaceus, Leuconostoc kimchii, Weissella cibaria and Weissella confusa for faba bean bioprocessing." International Journal of Food Microbiology 302 (August 2019): 24–34. http://dx.doi.org/10.1016/j.ijfoodmicro.2018.08.014.

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Choi, Hyejung, Hwawon Lee, and Sun Yoon. "Fermentation of rice flour with Weissella koreensis HO20 and Weissella kimchii HO22 isolated from kimchi and its use in the making of jeolpyeon." Korean journal of food and cookery science 29, no. 3 (June 29, 2013): 267–74. http://dx.doi.org/10.9724/kfcs.2013.29.3.267.

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Vásquez-Machado, Gersson, Miguel Rubiano-Garzón, Jonny Yepes-Blandón, Daniel Gordillo-González, and Jersson Avila-Coy. "Weissellosis in rainbow trout in Colombia." Brazilian Journal of Veterinary Pathology 13, no. 3 (November 26, 2020): 575–80. http://dx.doi.org/10.24070/bjvp.1983-0246.v13i3p575-580.

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Weissellosis is an emergent disease caused by Weissella, a Gram-positive bacteria correlated with hemorrhagic illness and mortality in farm-raised trout in several countries. The current study reports the first outbreaks of weissellosis by Weissella ceti in rainbow trout (Oncorhynchus mykiss), which caused severe mortalities in trout farms in Colombia between May 2016 to June 2019. The disease occurred in several farms irrigated by the same river where temperatures were above 17 °C. Symptoms of the disease were limited almost exclusively to trout above 250 g. The clinical signs consisted of lethargic and anorexic fish, swimming in circles at the surface or against the walls. Pathological findings were mainly ocular lesions like bilateral exophthalmia, periocular and intraocular hemorrhage, lenticular opacity and corneal rupture usually leading to blindness, muscular hemorrhages and necrosis. Microbial isolating from eye, brain, kidney, liver and muscle was performed and W. ceti was confirmed by amplification and sequencing of the 16S rRNA. The aim of this work was to characterize the Weisellosis by Weissella ceti in trouts in Colombia, including microbiological isolating, molecular analysis, gross and microscopic characterization.

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A.I. AL-Tameemi, M.J. Masarudin, R.A. Rahim, V. Timms, B. Neilan, and N.M. Isa. "ANTIBACTERIAL PROPERTIES OF ZINC OXIDE NANOPARTICLES SYNTHESIZED BY THE SUPERNATANT OF WEISSELLA CONFUSA UPM22MT04." IRAQI JOURNAL OF AGRICULTURAL SCIENCES 54, no. 5 (October 29, 2023): 1209–22. http://dx.doi.org/10.36103/ijas.v54i5.1816.

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This study was aimed to produce zinc oxide nanoparticles (ZnO-NPs) using the supernatant of Weissella confusa UPM22MT04 and assess their effectiveness in inhibiting methicillin-resistant Staphylococcus aureus (MRSA). An isolate of Weissella confusa UPM22MT04 was isolated from a wastewater treatment plant in Johor, Malaysia, and was utilized to synthesize ZnO-NPs. The synthesized ZnO-NPs were characterized through several techniques, including UV-visible spectroscopy, Fourier-transform infrared spectroscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and dynamic light scattering. Monodisperse spherical ZnO-NPs of 1.7 - 7.9 nm were obtained with 0.1 M zinc nitrate at 80°C. The biosynthesized ZnO-NPs exhibited vigorous inhibitory activity against MRSA. Results found that ZnO-NPs inhibited MRSA at a minimum concentration of 0.625 mg/mL and were bactericidal at a minimum concentration of 1.25 mg/mL. In MTT assays, ZnO-NPs showed no toxicity to HS-27 fibroblasts. The supernatant of Weissella confusa UPM22MT04 could be used to synthesize ZnO-NPs, which are an antibacterial agent, eco-friendly and non-toxic.

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Teixeira, Camila Gonçalves, Rafaela da Silva Rodrigues, Ricardo Seiti Yamatogi, Anca Lucau-Danila, Djamel Drider, Luís Augusto Nero, and Antônio Fernandes de Carvalho. "Genomic Analyses of Weissella cibaria W25, a Potential Bacteriocin-Producing Strain Isolated from Pasture in Campos das Vertentes, Minas Gerais, Brazil." Microorganisms 10, no. 2 (January 28, 2022): 314. http://dx.doi.org/10.3390/microorganisms10020314.

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Weissella is a genus containing Gram-positive, heterofermentative bacteria belonging to the lactic acid bacteria (LAB) group. These bacteria are endowed with promising technological and antimicrobial attributes. Weissella cibaria W25 was isolated from a dairy environment where raw milk cheeses are produced. Therefore, we sequenced and assembled the W25 draft genome sequence, which consists of 41 contigs totaling ~2.4 Mbp, with a G + C content of 45.04%. Then we carried out a comprehensive comparative genomic analysis with W. cibaria 110, known to produce the weissellicin 110 bacteriocin, and four other non-bacteriocin-producing W. cibaria strains.

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Pereira, G. A., E. M. Santos, G. G. L. Araújo, J. S. Oliveira, R. M. A. Pinho, A. de M. Zanine, A. F. N. Souza, A. J. S. Macedo, J. M. C. Neto, and T. V. C. Nascimento. "Isolation and identification of lactic acid bacteria in fresh plants and in silage from Opuntia and their effects on the fermentation and aerobic stability of silage." Journal of Agricultural Science 157, no. 9-10 (December 2019): 684–92. http://dx.doi.org/10.1017/s0021859620000143.

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AbstractThe current study aimed to select the strains of lactic acid bacteria (LAB) isolated from forage cactus plants and silage and assess their effects on silage fermentation and aerobic stability. Forty wild isolates from plant and cactus silage, classified as LAB, were evaluated for metabolite production and identified by 16S ribosomal DNA sequencing. These wild isolates were identified as Lactobacillus plantarum, Weissella cibaria, Weissella confusa and Weissella paramesenteroides and the LAB populations differed among the silage. The use of microbial inoculants did not influence gas or effluent losses in forage cactus silage. The silage inoculated with the microbial strain GP15 showed the highest number of LAB populations. The amounts of water-soluble carbohydrates (WSC) and ammonia nitrogen differed among the silage. The silage inoculated with the GP1 strain presented the highest WSC. Populations of enterobacteria and yeasts and moulds were below the minimum detection limit (<2.0 log cfu/g silage) in all the silage studied. The predominant action of inoculants was to maximize dry matter recovery of the silage, which could be the criterion adopted to select the strains of LAB for use as inoculants in Opuntia silage.

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NAN, LIN-HU, YI-SHENG CHEN, HUI-CHUNG WU, YU-CHING SU, MIN-CHIN LIAO, and FUJITOSHI YANAGIDA. "Distribution and antimicrobial activity of lactic acid bacteria associated with lychee fruits." Romanian Biotechnological Letters 25, no. 6 (October 18, 2020): 2079–85. http://dx.doi.org/10.25083/rbl/25.6/2079.2085.

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Lychee is a popular fruit in China and southeastern Asia. Although it is very popular, the microbiota of lactic acid bacteria (LAB) associated with lychee remains poorly described. Lychee samples from seven different markets located in three cities in Taiwan were collected and a total of 104 LAB were isolated. Through RFLP analyses of 16S rDNA and rpoA genes for grouping and 16S rRNA gene sequencing, these isolates were finally divided into 6 groups (A to F). The most common genera of LAB in lychee samples were Weissella and Leuconostoc. Weissella confusa strain E was found to produce a bacteriocin active against Listeria monocytogenes and some other Gram-positive bacteria. Mass spectrometry analysis revealed the bacteriocin mass to be approximately 3426.77 Da, which is different to other known Weissella bacteriocins. In addition, strain MB7 included in the genus Leuconostoc was identified as potential novel species or subspecies on the basis of phylogenetic analysis of 16S rRNA, rpoA and pheS gene sequences. Thus, this is the first report describing the distribution and varieties of LAB associated with lychee fruits. In addition, one potential novel LAB species or subspecies and one potential novel bacteriocin were also reported in this study.

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Hurt, William, Sugeevan Savarimuthu, Nabeela Mughal, and Luke S. P. Moore. "A rare case of Weissella confusa endocarditis." Clinical Infection in Practice 12 (November 2021): 100078. http://dx.doi.org/10.1016/j.clinpr.2021.100078.

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Siavoshi, Farideh, Hoda Ebrahimi, and Abdolfattah Sarrafnejad. "Weissella confusa with thermostable β-hemolytic exopolysaccharide." Toxicon 202 (October 2021): 67–74. http://dx.doi.org/10.1016/j.toxicon.2021.09.015.

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Dušková, Marta, Josef Kameník, and Renata Karpíšková. "Weissella viridescens in meat products – a review." Acta Veterinaria Brno 82, no. 3 (2013): 237–41. http://dx.doi.org/10.2754/avb201382030237.

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Although ubiquitous, bacteria of theWeissellagenus are not given sufficient attention. Many members of the genus were originally classified asLeuconostocorLactobacillus. With the development of molecular methods, these phylogenetically closely related bacteria formed a separate group, theWeissellagenus. Due to its heterofermentative metabolism,Weissellaspp. may cause considerable damage particularly in the meat industry. Slime formation and greening of meat products are sensory defects for which the technologically important speciesWeissella viridescensis responsible. This article summarizes basic information about the influence ofWeissella viridescenson meat processing.

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Lee, J. S. "Weissella koreensis sp. nov., isolated from kimchi." INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 52, no. 4 (July 1, 2002): 1257–61. http://dx.doi.org/10.1099/ijs.0.02074-0.

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Lee, Jung-Sook, Keun Chul Lee, Jong-Seog Ahn, Tae-Ick Mheen, Yu-Ryang Pyun, and Yong-Ha Park. "Weissella koreensis sp. nov., isolated from kimchi." International Journal of Systematic and Evolutionary Microbiology 52, no. 4 (July 1, 2002): 1257–61. http://dx.doi.org/10.1099/00207713-52-4-1257.

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Benomar, N., H. Abriouel, H. Lee, G. S. Cho, M. Huch, R. P. Pulido, W. H. Holzapfel, A. Galvez, and C. M. A. P. Franz. "Genome Sequence of Weissella thailandensis fsh4-2." Journal of Bacteriology 193, no. 20 (September 27, 2011): 5868. http://dx.doi.org/10.1128/jb.05883-11.

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Vasquez, Amber, and Joan-Miquel Balada-Llasat. "Reply to “Confused by Weissella confusa Bacteremia”." Journal of Clinical Microbiology 53, no. 6 (May 14, 2015): 2002. http://dx.doi.org/10.1128/jcm.00529-15.

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Kim, D. S., S. H. Choi, D. W. Kim, S. H. Nam, R. N. Kim, A. Kang, A. Kim, and H. S. Park. "Genome Sequence of Weissella cibaria KACC 11862." Journal of Bacteriology 193, no. 3 (November 19, 2010): 797–98. http://dx.doi.org/10.1128/jb.01342-10.

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Björkroth, K. Johanna, Ulrich Schillinger, Rolf Geisen, Norbert Weiss, Bart Hoste, Wilhelm H. Holzapfel, Hannu J. Korkeala, and Peter Vandamme. "Taxonomic study of Weissella confusa and description of Weissella cibaria sp. nov., detected in food and clinical samples." International Journal of Systematic and Evolutionary Microbiology 52, no. 1 (January 1, 2002): 141–48. http://dx.doi.org/10.1099/00207713-52-1-141.

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Erdoğmuş, Sevim Feyza, Uğur Cengiz Erişmiş, and Cevdet Uğuz. "Isolation and identification of lactic acid bacteria from fermented meat products and evaluation of their antimicrobial effect." Czech Journal of Food Sciences 39, No. 4 (August 29, 2021): 289–96. http://dx.doi.org/10.17221/222/2020-cjfs.

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In this study, 30 lactic acid bacteria (LAB) were isolated from 20 different fermented meat products obtained from the Afyonkarahisar province (Turkey). Molecular identification of these isolates was performed by amplification of the 16S rDNA gene using the polymerase chain reaction (PCR) method. LAB isolated from 'sucuk' (spicy and fermented sausage) samples were identified as Enterococcus faecalis (2 isolates), Enterococcus durans (1 isolate), Lactobacillus sakei (3 isolates), Lactobacillus curvatus (2 isolates), Weissella viridescens (3 isolates), Weissella cibaria (2 isolates) and Weissella hellenica (1 isolate). LAB, isolated from salami samples, were identified as W. viridescens (1 isolate), E. durans (3 isolates), Leuconostoc mesenteroides (4 isolates), Carnobacterium maltaromaticum (1 isolate), Macrococcus caseolyticus (1 isolate). Also, LAB, isolated from sausages samples, were identified as E. faecalis (1 isolate), E. durans (4 isolates), Lactobacillus plantarum (1 isolate). Both agar spot and agar well diffusion assay methods were used to determine the antimicrobial activity of the LAB isolates. Isolates of LAB showed higher antimicrobial activity against Listeria monocytogenes ATCC 19115, Staphylococcus aureus ATCC 25923, Klebsiella pneumoniae NRRL B 4420, Pseudomonas aeruginosa ATCC 11778, Streptococcus faecalis NRRL B 14617 than against Escherichia coli ATCC 35218 and Bacillus subtilis NRS 744. Results showed that the LAB isolates produced antimicrobial substances that have a potential for different industrial and biotechnological uses.

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SAMELIS, JOHN, JOHANNA BJÖRKROTH, ATHANASIA KAKOURI, and JOHN REMENTZIS. "Leuconostoc carnosum Associated with Spoilage of Refrigerated Whole Cooked Hams in Greece." Journal of Food Protection 69, no. 9 (September 1, 2006): 2268–73. http://dx.doi.org/10.4315/0362-028x-69.9.2268.

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A polyphasic taxonomic approach was used to identify a major atypical group of gas-forming, arginine-negative lactic acid bacteria associated with spoilage of whole (nonsliced) refrigerated (4°C) cooked hams produced in two Greek industrial meat plants. Biochemical characterization revealed that the ham isolates shared their phenotypic properties with Leuconostoc carnosum, Weissella viridescens, and Weissella hellenica. However, gas chromatographic analysis of cellular fatty acids clearly differentiated the ham isolates from the Weissella spp. None of the isolates contained eicosenoic acid (n-C20:1), which is typically synthesized by W. viridescens, but all strains contained high amounts of C19cycl acid, which is absent in W. hellenica and has been found in trace amounts in W. viridescens. All strains had similar cellular fatty acid profiles, which were qualitatively similar to those of the cellular fatty acids of L. carnosum. In addition to the phenotypic and chemotaxonomic tests, three representative isolates were studied using a lactic acid bacteria database, which employs 16S and 23S HindIII restriction fragment length polymorphism patterns as operational taxonomic units in a numerical analysis. The isolate patterns were identical to those of the L. carnosum type strain, NCFB 2776T. Based on the polyphasic taxonomic approach, the dominating lactic acid bacteria group was identified as L. carnosum.

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Snauwaert, Isabel, Zoi Papalexandratou, Luc De Vuyst, and Peter Vandamme. "Characterization of strains of Weissella fabalis sp. nov. and Fructobacillus tropaeoli from spontaneous cocoa bean fermentations." International Journal of Systematic and Evolutionary Microbiology 63, Pt_5 (May 1, 2013): 1709–16. http://dx.doi.org/10.1099/ijs.0.040311-0.

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Six facultatively anaerobic, non-motile lactic acid bacteria were isolated from spontaneous cocoa bean fermentations carried out in Brazil, Ecuador and Malaysia. Phylogenetic analysis revealed that one of these strains, designated M75T, isolated from a Brazilian cocoa bean fermentation, had the highest 16S rRNA gene sequence similarity towards Weissella fabaria LMG 24289T (97.7 %), W. ghanensis LMG 24286T (93.3 %) and W. beninensis LMG 25373T (93.4 %). The remaining lactic acid bacteria isolates, represented by strain M622, showed the highest 16S rRNA gene sequence similarity towards the type strain of Fructobacillus tropaeoli (99.9 %), a recently described species isolated from a flower in South Africa. pheS gene sequence analysis indicated that the former strain represented a novel species, whereas pheS, rpoA and atpA gene sequence analysis indicated that the remaining five strains belonged to F. tropaeoli ; these results were confirmed by DNA–DNA hybridization experiments towards their respective nearest phylogenetic neighbours. Additionally, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry proved successful for the identification of species of the genera Weissella and Fructobacillus and for the recognition of the novel species. We propose to classify strain M75T ( = LMG 26217T = CCUG 61472T) as the type strain of the novel species Weissella fabalis sp. nov.

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Tang, Ning, Xiaolong Xing, Huipin Li, Honggang Jiao, Shengxin Ji, and Zhilu Ai. "Effect of Alkali on the Microbial Community and Aroma Profile of Chinese Steamed Bread Prepared with Chinese Traditional Starter." Foods 12, no. 3 (February 1, 2023): 617. http://dx.doi.org/10.3390/foods12030617.

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Alkali is an indispensable additive in Chinese steamed bread (CSB) production. This work aimed to evaluate the key roles of alkali in the microbial community of dough fermented using Chinese traditional starter (CTS) and the aroma profiles of CSB. The dominant fungi in CTS and fermented dough were members of the phylum Ascomycota and the genus Saccharomyces. Pediococcus, Companilactobacillus, and Weissella were the dominant bacterial genera in CTS and fermented dough. Adding alkali could retain the types of dominant yeasts and LAB derived from CTS, decrease the relative abundance of Companilactobacillus crustorum and Weissella cibaria, and increase that of Pediococcus pentosaceus, in fermented dough. Principal component analysis (PCA) indicated that adding alkali decreased the content of sourness-related volatiles in CSB fermented by CTS. Correlation analysis showed that Pediococcus and Weissella in fermented dough were positively correlated with the lipid oxidation flavor-related compounds in CSB, and Lactobacillus was positively correlated with sourness-related aroma compounds. Synthetic microbial community experiments indicated that CSB fermented by the starter containing P. pentosaceus possessed a strong aroma, and adding alkali weakened the flavor intensity. Alkali addition could promote the formation of ethyl acetate and methyl acetate with a pleasant fruity aroma in W. cibaria-associated CSB.

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Zou, Jing, Xiaohui Chen, Chenyu Wang, Yang Liu, Miao Li, Xinyuan Pan, and Xuedong Chang. "Microbial Communities and Correlation between Microbiota and Volatile Compounds in Fermentation Starters of Chinese Sweet Rice Wine from Different Regions." Foods 12, no. 15 (August 2, 2023): 2932. http://dx.doi.org/10.3390/foods12152932.

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Chinese sweet rice wines (CSRW) are traditional, regionally distinct alcoholic beverages that are generally brewed with glutinous rice and fermentation starters. This study aimed to characterize microbial communities and volatile compounds of CSRW starters and explore correlations between them. The major volatiles in starters include 1-heptanol, 1-octanol, 2-nonanol, phenylethyl alcohol, 2-nonanone, acetophenone, and benzaldehyde. Microbiological analysis based on high-throughput sequencing (HTS) technology demonstrated that starter bacterial communities are dominated by Weissella, Pediococcus, and Lactobacillus, while Saccharomycopsis and Rhizopus predominate in fungal communities. Carbohydrate and amino acid metabolism are the most active metabolic pathways in starters. Spearman correlation analysis revealed that 15 important volatile compounds including alcohols, acids, aldehydes and esters were significantly positively correlated with nine microbial genera (|r| > 0.7, p < 0.05), including five bacterial genera (i.e., Weissella, Pediococcus, Lactobacillus, Bacillus, and Nocardiopsis) and four fungal genera (i.e., Saccharomycopsis, Rhizopus, Wickerhamomyces, and Cyberlindnera), spanning 19 distinct relationships and these microorganisms were considered the core functional microorganisms in CSRW starters. The most important positive correlations detected between phenylethyl alcohol and Weissella or Saccharomycopsis and between 2-nonanol and Pediococcus. This study can serve as a reference to guide the development of defined starter cultures for improving the aromatic quality of CSRW.

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Papagianni, Maria. "Effects of dissolved oxygen and pH levels on weissellin A production by Weissella paramesenteroides DX in fermentation." Bioprocess and Biosystems Engineering 35, no. 6 (January 25, 2012): 1035–41. http://dx.doi.org/10.1007/s00449-012-0689-1.

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Colo, Josip, Sanja Mihajlovic, Maja Tolinacki, Mersiha Alkic, Dusanka Popovic, Milan Kojic, and Amarela Terzic-Vidojevic. "Characterization of lactic acid bacteria isolated from Bosnian artisanal dry fermented sausage (sudzuk) during fermentation." Genetika 47, no. 3 (2015): 819–32. http://dx.doi.org/10.2298/gensr1503819c.

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Bosnian sudzuk is a dry fermented sausage produced in a rural household near the town of Visoko in central Bosnia and Herzegovina. This kind of sausage was manufactured only from beef and spices in a traditional way without the addition of a starter cultures. To identify lactic acid bacteria (LAB), a total number of 160 Lstrains were isolated from five samples of Bosnian sudzuk collected over 28 days of fermentation. Preliminary identification by phenotypic tests and 16S rDNA sequencing were performed for all 160 of the Lisolates. Identification of Lstrains from traditionally produced Bosnian sausage at the species level revealed the presence of six genera: Lactococcus sp., Enterococcus sp., Leuconostoc sp., Lactobacillus sp., Pediococcus sp. and Weissella sp.. Among the 15 distinct species identified, the species Lactobacillus plantarum, Leuconostoc mesenteroides, Lactococcus lactis, Enterococcus faecalis and Enterococcus durans were present throughout the entire process of fermentation. Leuconostoc mesenteroides, Lactobacillus plantarum and Lactococcus lactis prevailed, with 21.8%, 19.3% and 13.1%, respectively, of total Lstrains during the entire fermentation process. Significant negative correlations (r = 0.892 and r = 0.829, respectively) between the presence of Weissella sp. and Lactobacillus sp., and between the presence of Weissella sp. and Lactococcus sp. were recorded. Lactobacillus plantarum, Enterococcus durans and Leuconostoc mesenteroides were the best producers of aromogenic compounds while 32.3% of Lactobacillus plantarum and 28.6% of Leuconostoc mesenteroides were produced exopolysaccharides.

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Journal articles on the topic 'Weissella'

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