Relevant bibliographies by topics / Streptococcus uberis

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Academic literature on the topic 'Streptococcus uberis'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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Journal articles on the topic "Streptococcus uberis"

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Brown, M. B., and A. E. Scasserra. "Antimicrobial resistance in streptococcal species isolated from bovine mammary glands." American Journal of Veterinary Research 51, no. 12 (1990): 2015–18. http://dx.doi.org/10.2460/ajvr.1990.51.12.2015.

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SUMMARY Streptococcal species isolated from dairy cows with clinical mastitis were obtained from mastitis research workers in Florida, Louisiana, New York, Vermont, Washington, and West Virginia. Seventy-one streptococcal isolates were tested, including 39 strains of Streptococcus agalactiae, 21 strains of S dysgalactiae, and 11 strains of S uberis. The minimal inhibitory concentration of erythromycin, lincomycin, oxytetracycline, penicillin, spectinomycin, streptomycin, and tetracycline was determined for each isolate. Differences were not detected among strains with respect to geographic ori
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ZADOKS, R. N., R. N. GONZÁLEZ, K. J. BOOR, and Y. H. SCHUKKEN. "Mastitis-Causing Streptococci Are Important Contributors to Bacterial Counts in Raw Bulk Tank Milk." Journal of Food Protection 67, no. 12 (2004): 2644–50. http://dx.doi.org/10.4315/0362-028x-67.12.2644.

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The objective of this study was to probe the contribution of streptococci to the microbial quality of raw milk. Over a 5-month period, bulk tank milk samples from 48 New York State dairy farms were analyzed qualitatively for bacterial ecology and quantitatively for total bacterial, streptococcal, staphylococcal, and gram-negative bacterial counts. Linear regression analysis was used to determine the contribution of differential counts to total bacterial counts. Streptococci, staphylococci, and gram-negative bacteria accounted for 69, 3, and 3% of total bacterial count variability, respectively
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SHOME, BIBEK RANJAN, MANI BHUVANA, SUSWETA DAS MITRA, et al. "Multiplex PCR for rapid detection of Streptococcus agalactiae, Streptococcus uberis and Streptococcus dysgalactiae in subclinical mastitis milk." Indian Journal of Animal Sciences 82, no. 10 (2012): 1137–41. http://dx.doi.org/10.56093/ijans.v82i10.24279.

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To improve mastitis diagnosis and achieve rapid, specific, reliable and cost effective test, a multiplex PCR for simultaneous detection and differentiation of major streptococcal species, viz. Streptococcus agalactiae, Streptococcus uberis and Streptococcus dysgalactiae was developed. Evaluation with 24 ATCC strains and 606 strains comprising streptococci (84) and staphylococci (522) showed the assay to be highly accurate. The threshold of detection of the mPCR assay was 10fg of genomic DNA and < 102 CFU ml-1. Assessment of 115 milk samples collected from subclinically infected herd, showed
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Shevchenko, M., and A. Andriichuk. "Antibiotic resistance of isolates of Staphylococcus spp. and Streptococcus spp. causing mastitis on dairy farms in Ukraine." Naukovij vìsnik veterinarnoï medicini, no. 1(180) (May 25, 2023): 81–88. http://dx.doi.org/10.33245/2310-4902-2023-180-1-81-88.

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Mastitis is the most common pathology of cows that causes large economic losses to dairy farms. Mastitis is often caused by a group of infectious associated pathogens that can be transmitted among animals. Most often, the pathological process in subclinically and clinically sick animals is caused by coccal gram-positive microflora. A major problem is the mechanisms by which microorganisms acquire resistance to one or more antibacterial agents. Thus, standard treatment regimens used on the farm become ineffective. The publication presents the results of the study of antibiotic resistance of 45
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Varhimo, Emilia, Kirsi Savijoki, Jari Jalava, Oscar P. Kuipers, and Pekka Varmanen. "Identification of a Novel Streptococcal Gene Cassette Mediating SOS Mutagenesis in Streptococcus uberis." Journal of Bacteriology 189, no. 14 (2007): 5210–22. http://dx.doi.org/10.1128/jb.00473-07.

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ABSTRACT Streptococci have been considered to lack the classical SOS response, defined by increased mutation after UV exposure and regulation by LexA. Here we report the identification of a potential self-regulated SOS mutagenesis gene cassette in the Streptococcaceae family. Exposure to UV light was found to increase mutations to antibiotic resistance in Streptococcus uberis cultures. The mutational spectra revealed mainly G:C→A:T transitions, and Northern analyses demonstrated increased expression of a Y-family DNA polymerase resembling UmuC under DNA-damaging conditions. In the absence of t
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Zouharova, M., K. Nedbalcova, P. Slama, J. Bzdil, M. Masarikova, and J. Matiasovic. "Occurrence of virulence-associated genes in Streptococcus uberis and Streptococcus parauberis isolated from bovine mastitis." Veterinární Medicína 67, No. 3 (2022): 123–30. http://dx.doi.org/10.17221/95/2021-vetmed.

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Streptococcus uberis is one of the most important mastitis-causing pathogens. Although the pathogenesis and virulence factors required for the intramammary infection development are not yet well established, several putative virulence-associated genes have been described. This work aimed to investigate the presence of ten known and putative virulence-associated genes in S. uberis isolated from subclinical or clinical mastitis and its closely related species Streptococcus parauberis in 135 dairy farms in the Czech Republic. The PCR analysis detected that all the examined isolates possessed at l
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REIDMILLER, JEFFREY S., WAYNE L. SMITH, MARY M. SAWYER, BENNIE I. OSBURN, JEFFERY L. STOTT, and JAMES S. CULLOR. "Antimicrobial Properties of the Chelating Agent EDTA on Streptococcal Bovine Mastitis Isolates." Journal of Food Protection 69, no. 6 (2006): 1460–62. http://dx.doi.org/10.4315/0362-028x-69.6.1460.

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To determine the efficacy of the chelating agent EDTA on microbial growth, separate cultures of two streptococcal bovine mastitis isolates, Streptococcus agalactiae and Streptococcus uberis, were exposed to known concentrations of EDTA. Bacterial cultures of 108 CFU/ml were exposed to concentrations of EDTA ranging from 30 to 100 mM in an in-vitro-milk environment. Multiple replications of cultures exposed to EDTA were plated during a two-hour time course. A concentration of 100 mM EDTA resulted in a 90% reduction of S. agalactiae and a 99% reduction of S. uberis. Under these experimental cond
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Haenni, Marisa, Laure Galofaro, Mathilde Ythier, et al. "Penicillin-Binding Protein Gene Alterations in Streptococcus uberis Isolates Presenting Decreased Susceptibility to Penicillin." Antimicrobial Agents and Chemotherapy 54, no. 3 (2010): 1140–45. http://dx.doi.org/10.1128/aac.00915-09.

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ABSTRACT Streptococcus uberis is an environmental pathogen commonly causing bovine mastitis, an infection that is generally treated with penicillin G. No field case of true penicillin-resistant S. uberis (MIC > 16 mg/liter) has been described yet, but isolates presenting decreased susceptibility (MIC of 0.25 to 0.5 mg/liter) to this drug are regularly reported to our laboratory. In this study, we demonstrated that S. uberis can readily develop penicillin resistance in laboratory-evolved mutants. The molecular mechanism of resistance (acquisition of mutations in penicillin-binding protein 1A
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Doane, R. M., S. P. Oliver, R. D. Walker, and E. P. Shull. "Experimental infection of lactating bovine mammary glands with Streptococcus uberis in quarters colonized by Corynebacterium bovis." American Journal of Veterinary Research 48, no. 5 (1987): 749–54. https://doi.org/10.2460/ajvr.1987.48.05.749.

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SUMMARY Twenty-seven quarters of 18 lactating dairy cows were inoculated intramammarily with 3.6 − 104 colony-forming units (cfu) of a strain of Streptococcus uberis isolated from a cow with clinical mastitis. Before quarters were inoculated, 22 were considered as naturally colonized with Corynebacterium bovis, and 5 were considered bacteriologically negative. Streptococcus uberis was isolated from all quarters within 2 days after inoculation, and all quarters developed clinical mastitis by 3 days after inoculation. Mastitis was acute, and most cows had increased rectal temperatures. The numbe
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Almeida, Raúl A., Oudessa Kerro Dego, Susan I. Headrick, Mark J. Lewis, and Stephen P. Oliver. "Role of Streptococcus uberis adhesion molecule in the pathogenesis of Streptococcus uberis mastitis." Veterinary Microbiology 179, no. 3-4 (2015): 332–35. http://dx.doi.org/10.1016/j.vetmic.2015.07.005.

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Dissertations / Theses on the topic "Streptococcus uberis"

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Pryor, Shona Marie. "Bovine mastitis and ecology of Streptococcus uberis." The University of Waikato, 2008. http://hdl.handle.net/10289/2580.

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Bovine mastitis caused by Streptococcus uberis is a common problem in pasture-based dairying systems. This study examines both the ecology of S. uberis and infection of the bovine mammary gland on a New Zealand dairy farm. Initially, the REP-PCR strain typing method was developed and the potential of MALDI-TOF mass spectrometry evaluated as a strain typing method. While strain-specific mass spectra were obtained with MALDI-TOF mass spectrometry, the irreproducibility of spectra was its major downfall. With further work, this rapid method could be very useful for strain typing S. uberis on a la
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Gilchrist, Tamara Louise. "Genotypic and phenotypic characterisation of Streptococcus uberis." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/2938/.

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Streptococcus uberis is an important bovine mastitis pathogen, which places a significant financial burden upon the dairy industry. Determining the genetic diversity of a collection of field isolates and the mechanisms by which S. uberis colonises the host were the general aims of this project, in particular the determination of the basis for bacterial persistence despite antibacterial therapy. Multi-locus sequence typing identified high levels of recombination within the population, but also a single dominant clonal complex which comprised nearly all sequence types which were isolated from mo
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Crowley, Rebecca Clare. "Molecular analysis of biofilm growth in streptococcus uberis." Thesis, University of Sussex, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488613.

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Streptococcus uberis is a major causative agent of bovine intramammary infections worldwide. S. uberis infections can persist for several months and resistance to antibiotic therapies has been observed. At present, the failure to bring S. uberis infections under control has been linked to the current lack of information with regards to S. uberis pathogenesis.
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Rapier, Christopher David. "Characterisation of the plasmin receptor of Streptococcus uberis." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268981.

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Denham, Emma Louise. "Molecular characterisation of lipoprotein processing in Streptococcus uberis." Thesis, University of Leicester, 2007. http://hdl.handle.net/2381/30496.

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Streptococcus uberis is a common cause of bovine mastitis and the lipoprotein MtuA has been shown to be essential for growth in milk and virulence. The enzymes responsible for processing lipoproteins in other Gram positive bacteria are lipoprotein diacylglyceryl transferase (Lgt) which acts to anchor lipoproteins to the membrane and lipoprotein signal peptidase (Lsp) which cleaves the signal peptide. S. uberis mutants containing lesions in lgt and lsp uncovered several novel phenotypes. A number of additional proteins were shown to be present in extracellular fractions prepared from lgt- and l
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Hossain, Muhammad Maqsud. "Bioinformatic analysis of Streptococcus uberis genes and genomes." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/37355/.

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Streptococcus uberis is a Gram-positive, catalase-negative member of the family Streptococcaceae and is an important environmental pathogen primarily responsible for a significant amount of bovine intramammary infections. This thesis describes the sequencing and comparison of multiple strains from clinical and sub-clinical infections. Following de novo assembly, these are compared to the single reference strain (0140J). The assemblies of strains sequenced with two technologies (Illumina and SOLiD) were compared. From these assemblies, annotation allowed the comparison of gene content, the pan
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Wirawan, Ruth E., and n/a. "An investigation into the antimicrobial repertoire of Streptococcus uberis." University of Otago. Department of Microbiology & Immunology, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070312.142108.

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Streptococcus uberis, an environmental organism also associated with dairy animals, is a common and persistent cause of bovine mastitis. New approaches to control these infections need to be identified. One such strategy may be the application of bacteriocins; proteinaceous antimicrobials elaborated by bacteria that typically inhibit the growth of strains closely related to the producer organism. The well-characterized lactococcal bacteriocin nisin is the active ingredient in two commercial products currently in use for the prevention of mastitis. However, reports of resistance development hav
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Copsey, Sarah Denise. "Characterisation of a metal-ion dependent repressor in Streptococcus uberis." Thesis, University of Sussex, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426229.

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Khan, Izhar-ul-Haq. "Identification and further characterization of Streptococcus uberis and Streptococcus parauberis isolated from bovine milk samples." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964881799.

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Vinha, Rita Bronze. "Utilização intramamária de benzilpenicilina procaínica na terapêutica de mamites por Streptococcus uberis." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2020. http://hdl.handle.net/10400.5/20242.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Streptococcus uberis é um agente etiológico de mamites, ubiquitário no ambiente das vacas sendo considerado ambiental, porém com alguma componente contagiosa. Atualmente, é considerado um dos agentes mais preocupantes, que produz mamites tanto subclínicas como clínicas graves e, frequentemente, associadas a contagens de células somáticas (CCS) elevadas. Estas infeções acarretam uma grande dificuldade no processo de cura e as medidas clássicas de controlo de mamites não se demonstram eficazes contra este agente, pois dispõe de vários
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Book chapters on the topic "Streptococcus uberis"

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Kitt, A. J., and J. A. Leigh. "The Auxotrophic Nature of Streptococcus uberis." In Streptococci and the Host. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4899-1825-3_151.

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Lincoln, R. A., and J. A. Leigh. "Characterization of a Novel Plasminogen Activator from Streptococcus uberis." In Streptococci and the Host. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4899-1825-3_150.

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Field, T. R., P. M. Norton, A. P. Bland, and J. A. Leigh. "Changes in Bovine Neutrophils Induced by the Capsule of Streptococcus uberis." In Streptococci and the Host. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4899-1825-3_225.

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Berger, U. K., C. Haldemann, and W. Schaeren. "Epidemiological and microbiological characteristics of Streptococcus uberis as mastitis pathogen in Swiss dairy herds." In Udder Health and Communication. Wageningen Academic Publishers, 2011. http://dx.doi.org/10.3920/978-90-8686-742-4_67.

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Simjee, S., J. Amedeo, and A. M. Barletta. "Use of Tylan 200® for the treatment of mastitis caused by Staphylococcus aureus and/or Streptococcus uberis." In Udder Health and Communication. Wageningen Academic Publishers, 2011. http://dx.doi.org/10.3920/978-90-8686-742-4_51.

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Simjee, S., J. Amedeo, A. M. Barletta, and A. Pridmore. "Effect of the combination of Tylan 200® & Penicillin G in the treatment of mastitis caused by Staphylococcus aureus and/or Streptococcus uberis." In Udder Health and Communication. Wageningen Academic Publishers, 2011. http://dx.doi.org/10.3920/978-90-8686-742-4_50.

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Almeida, R. A., T. Batcha, and S. P. Oliver. "Persistence of Streptococcus uberis in bovine mammary epithelial cells." In Mastitis in dairy production. Brill | Wageningen Academic, 2005. http://dx.doi.org/10.3920/9789086865505_016.

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Lacy-Hulbert, S. J., R. T. Cursons, M. G. Lopez-Benavides, et al. "Isolation of Streptococcus uberis from different sites of the dairy cow." In Mastitis in dairy production. Brill | Wageningen Academic, 2005. http://dx.doi.org/10.3920/9789086865505_097.

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Lopez-Benavides, M. G., J. H. Williamson, R. T. Cursons, S. J. Lacy-Hulbert, and M. W. Woolford. "Streptococcus uberis population dynamics in the New Zealand pastoral dairy farm." In Mastitis in dairy production. Brill | Wageningen Academic, 2005. http://dx.doi.org/10.3920/9789086865505_099.

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Shoaib, Muhammad, Amjad Islam Aqib, Muhammad Aamir Naseer, et al. "Etiology of Bovine Mastitis." In Mastitis [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98543.

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Mastitis in dairy animals is the primary concern of dairy farmers, which is the most common disease that causes huge economic losses in the dairy industry. The economic losses due to mastitis are from a reduction in milk yield, condemnation of milk with antibiotic residues, veterinary treatment costs, and death. In addition, some mastitis pathogens also cause serious human diseases associated with the contamination of milk or milk products with bacteria or their toxins. Bovine mastitis is mainly caused by a wide range of environmental and contagious bacterial mastitis pathogens. Contagious pat
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Conference papers on the topic "Streptococcus uberis"

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Upadhyay, Shivanck, and Gene R. Pesola. "Streptococcus Uberis, An Unusual Cause Of Community Acquired Pneumonia." In American Thoracic Society 2012 International Conference, May 18-23, 2012 • San Francisco, California. American Thoracic Society, 2012. http://dx.doi.org/10.1164/ajrccm-conference.2012.185.1_meetingabstracts.a6119.

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Lima, Lívia Santos, AMANDA PINHEIRO DE FREITAS, IGOR SANTOS DE LIMA, ABRAÃO DOS SANTOS ALVES, and VANDERLEY TORRES DE OLIVEIRA FILHO. "MASTITE BOVINA CAUSADA POR STREPTOCOCCUS UBERIS: REVISÃO DE LITERATURA." In II Congresso Nacional de Especialidades Veterinárias On-line. Revista Multidisciplinar em Saúde, 2023. http://dx.doi.org/10.51161/convesp2023/20068.

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Pinto, Vanessa Arantes, Gabriela Santos Alencar, Adriano Favero, Hugo Franciscon, and Fagner Luiz Da Costa Freitas. "POTENCIAL MICROBIOLÓGICO DO SYZYGIUM AROMATICUM (L). SOBRE MICRORGANISMOS DE IMPORTÂNCIA NA MEDICINA VETERINÁRIA." In I Congresso On-line Nacional de Clínica Veterinária de Pequenos Animais. Revista Multidisciplinar em Saúde, 2021. http://dx.doi.org/10.51161/rems/1920.

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Introdução: O fenômeno de resistência a antimicrobianos está se mostrando um grande problema na saúde, ameaçando tanto a população humana como animal. Devido a isso, a descoberta de novos compostos com capacidade antimicrobiana torna-se imprescindível, e os fitoterápicos têm se mostrado uma alternativa promissora na terapia complementar. O óleo essencial (OE) de Syzygium aromaticum (Cravo da Índia), apresenta potencial capacidade antibacteriana e antifúngica devido às altas concentrações de Eugenol. Objetivos: Avaliar o potencial antimicrobiano do óleo essencial de Syzygium aromaticum (L). con
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Reports on the topic "Streptococcus uberis"

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Nelson, Corwin, Donald C. Beitz, and John Lippolis. Activation of Vitamin D3 in Bovine Mastitis Caused by Streptococcus uberis. Iowa State University, 2009. http://dx.doi.org/10.31274/ans_air-180814-951.

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