Bibliografías temáticas / Drinking water Salmonella typhimurium

Índice

Artículos de revistas
Tesis
Capítulos de libros
Actas de conferencias

Literatura académica sobre el tema "Drinking water Salmonella typhimurium"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 12 de febrero de 2022

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte las listas temáticas de artículos, libros, tesis, actas de conferencias y otras fuentes académicas sobre el tema "Drinking water Salmonella typhimurium".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Artículos de revistas sobre el tema "Drinking water Salmonella typhimurium"

Schaefer, L. M., V. S. Brözel y S. N. Venter. "Fate of Salmonella Typhimurium in laboratory-scale drinking water biofilms". Journal of Water and Health 11, n.º 4 (6 de agosto de 2013): 629–35. http://dx.doi.org/10.2166/wh.2013.208.

Texto completo

Resumen

Investigations were carried out to evaluate and quantify colonization of laboratory-scale drinking water biofilms by a chromosomally green fluorescent protein (gfp)-tagged strain of Salmonella Typhimurium. Gfp encodes the green fluorescent protein and thus allows in situ detection of undisturbed cells and is ideally suited for monitoring Salmonella in biofilms. The fate and persistence of non-typhoidal Salmonella in simulated drinking water biofilms was investigated. The ability of Salmonella to form biofilms in monoculture and the fate and persistence of Salmonella in a mixed aquatic biofilm was examined. In monoculture S. Typhimurium formed loosely structured biofilms. Salmonella colonized established multi-species drinking water biofilms within 24 hours, forming micro-colonies within the biofilm. S. Typhimurium was also released at high levels from the drinking water-associated biofilm into the water passing through the system. This indicated that Salmonella could enter into, survive and grow within, and be released from a drinking water biofilm. The ability of Salmonella to survive and persist in a drinking water biofilm, and be released at high levels into the flow for recolonization elsewhere, indicates the potential for a persistent health risk to consumers once a network becomes contaminated with this bacterium.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Pasmans, Frank, Kris Baert, An Martel, Alain Bousquet-Melou, Ruben Lanckriet, Sandra De Boever, Filip Van Immerseel, Venessa Eeckhaut, Patrick de Backer y Freddy Haesebrouck. "Induction of the Carrier State in Pigeons Infected with Salmonella enterica Subspecies enterica Serovar Typhimurium PT99 by Treatment with Florfenicol: a Matter of Pharmacokinetics". Antimicrobial Agents and Chemotherapy 52, n.º 3 (7 de enero de 2008): 954–61. http://dx.doi.org/10.1128/aac.00575-07.

Texto completo

Resumen

ABSTRACT Paratyphoid caused by Salmonella enterica subsp. enterica serovar Typhimurium is the main bacterial disease in pigeons. The ability of Salmonella serovar Typhimurium to persist intracellularly inside pigeon macrophages results in the development of chronic carriers, which maintain the infection in the flock. In this study, the effect of drinking-water medication with florfenicol on Salmonella infection in pigeons was examined. The pharmacokinetics of florfenicol in pigeons revealed a relatively high volume of distribution of 2.02 liters/kg of body weight and maximum concentrations in plasma higher than the MICs for the Salmonella strain used (4 μg/ml) but quick clearance of florfenicol due to a short half-life of 1.73 h. Together with highly variable bioavailability and erratic drinking-water uptake, these parameters resulted in the inability to reach a steady-state concentration through the continuous administration of florfenicol in the drinking water. Florfenicol was capable of reducing only moderately the number of intracellular salmonellae in infected pigeon macrophages in vitro. Only at high extracellular concentrations (>16 μg/ml) was a more-than-10-fold reduction of the number of intracellular bacteria noticed. Florfenicol treatment of pigeons via the drinking water from 2 days after experimental inoculation with Salmonella serovar Typhimurium until euthanasia at 16 days postinoculation resulted in a reduction of Salmonella shedding and an improvement in the fecal consistency. However, internal organs in florfenicol-treated pigeons were significantly more heavily colonized than those in untreated pigeons. In conclusion, the oral application of florfenicol for the treatment of pigeon paratyphoid contributes to the development of carrier animals through sub-MIC concentrations in plasma that do not inhibit intracellular persistency.

Los estilos APA, Harvard, Vancouver, ISO, etc.

JUNG, YONG SOO, ROBIN C. ANDERSON, JAMES A. BYRD, THOMAS S. EDRINGTON, RANDLE W. MOORE, TODD R. CALLAWAY, JACK McREYNOLDS y DAVID J. NISBET. "Reduction of Salmonella Typhimurium in Experimentally Challenged Broilers by Nitrate Adaptation and Chlorate Supplementation in Drinking Water†". Journal of Food Protection 66, n.º 4 (1 de abril de 2003): 660–63. http://dx.doi.org/10.4315/0362-028x-66.4.660.

Texto completo

Resumen

The effects of two feed supplements on Salmonella Typhimurium in the ceca of market-age broilers were determined. Broilers orally challenged 6 days before slaughter with a novobiocin- and nalidixic acid–resistant strain of Salmonella Typhimurium were divided into one of four groups (20 birds each). The first group (the control group) received no treatment, the second group received sodium nitrate (SN) treatment (574 mg of NaNO3 per kg of feed), the third group received experimental chlorate product (ECP) treatment (15 mM NaClO3 equivalents), and the fourth group received ECP treatment in combination with SN treatment. The SN treatment was administered via feed for 5 days immediately before slaughter, and ECP was provided via ad libitum access to drinking water for the last 2 days before slaughter. Cecal contents were subjected to bacterial analysis. Significant (P < 0.05) Salmonella Typhimurium reductions (ca. 2 log units) relative to levels for untreated control broilers were observed for broilers receiving ECP in combination with SN. The ECP-only treatment resulted in significant (P < 0.05) reductions (ca. 0.8 log) of Salmonella Typhimurium in trial 2. We hypothesize that increasing Salmonella Typhimurium nitrate reductase activity resulted in increased enzymatic reduction of chlorate to chlorite, with a concomitant decrease in cecal Salmonella Typhimurium levels. On the basis of these results, preadaptation with SN followed by ECP supplementation immediately preharvest could be a potential strategy for the reduction of Salmonella Typhimurium in broilers.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Kadry, Mona, Sara Mohamed Nader, Sohad M. Dorgham y Mai M. Kandil. "Molecular diversity of the invA gene obtained from human and egg samples". July-2019 12, n.º 7 (julio de 2019): 1033–38. http://dx.doi.org/10.14202/vetworld.2019.1033-1038.

Texto completo

Resumen

Background and Aim: Salmonellosis is one of the most common foodborne bacterial diseases in the world. The great majority of Salmonella infections in humans are foodborne with Salmonella enterica and Salmonella Typhimurium accounting for a major part of the problem. The objective of this study was to investigate the presence of invA gene in strains of Salmonellae isolated from eggs and diarrheal swabs from human cases. In addition, the relationship between invA gene nucleotide sequences from different sources (human stool and egg samples) have been studied through phylogenetic tree. Materials and Methods: One hundred and seventy eggs (eggshell and its contents) and 160 stool swabs samples were collected from four poultry farms and medical hospital in Giza Governorate. Results: The study reported the presence of two Salmonella strains in eggshell surface with an overall isolation rate of 1.2 and 0% of the egg content. Salmonella Enteritidis and Salmonella Typhimurium were isolated from eggshell surface with an incidence of 50% for each strain. Six salmonella strains were isolated from human stool with an incidence of 3.75%; the isolated strains are S. Typhimurium, S. Enteritidis, Salmonella Virchow, Salmonella Haifa, and Salmonella Kentucky with an incidence of 33.3%, 16.6%, 16.6%, 16.6%, and 16.6%, respectively. Among eight Salmonella strains, invA gene was detected with percentage of 50%. The phylogenetic analysis of the sequences invA gene, from two isolates included in this study and five isolates retrieved from GenBank showed that sequence from human, layer hens, egg, and water in the same clusters. Conclusion: Close relation between drinking contaminated water and layer hens and contaminated water is one such source.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Angelopoulou, Michailia, Konstantina Tzialla, Angeliki Voulgari, Mary Dikeoulia, Ioannis Raptis, Sotirios Elias Kakabakos y Panagiota Petrou. "Rapid Detection of Salmonella typhimurium in Drinking Water by a White Light Reflectance Spectroscopy Immunosensor". Sensors 21, n.º 8 (10 de abril de 2021): 2683. http://dx.doi.org/10.3390/s21082683.

Texto completo

Resumen

Biosensors represent an attractive approach for fast bacteria detection. Here, we present an optical biosensor for the detection of Salmonella typhimurium lipopolysaccharide (LPS) and Salmonella bacteria in drinking water, based on white light reflectance spectroscopy. The sensor chip consisted of a Si die with a thin SiO2 layer on top that was transformed into a biosensor through the immobilization of Salmonella LPS. The optical setup included a reflection probe with seven 200 μm fibers, a visible and near-infrared light source, and a spectrometer. The six fibers at the reflection probe circumference were coupled with the light source and illuminated the biosensor chip vertically, whereas the central fiber collected the reflected light and guided it to the spectrometer. A competitive immunoassay configuration was adopted for the analysis. Accordingly, a mixture of LPS or bacteria solution, pre-incubated for 15 min, with an anti-Salmonella LPS antibody was pumped over the chip followed by biotinylated secondary antibody and streptavidin for signal enhancement. The binding of the free anti-Salmonella antibody to chip-immobilized LPS led to a shift of the reflectance spectrum that was inversely related to the analyte concentration (LPS or bacteria) in the calibrators or samples. The total assay duration was 15 min, and the detection limits achieved were 4 ng/mL for LPS and 320 CFU/mL for bacteria. Taking into account the low detection limits, the short analysis time, and the small size of the chip and instrumentation employed, the proposed immunosensor could find wide application for bacteria detection in drinking water.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Shankar, Prem, Jyotsna Mishra, Vijaya Bharti, Deepak Parashar y Sarman Singh. "Multiplex PCR assay for simultaneous detection and differentiation of Entamoeba histolytica, Giardia lamblia, and Salmonella spp. in the municipality-supplied drinking water". Journal of Laboratory Physicians 11, n.º 03 (julio de 2019): 275–80. http://dx.doi.org/10.4103/jlp.jlp_66_18.

Texto completo

Resumen

Abstract BACKGROUND: The contamination with Entamoeba histolytica, Giardia lamblia, and Salmonella spp. in drinking water is the most prevalent in Indian subcontinent, but often difficult to detect all these pathogens from the drinking water. MATERIALS AND METHODS: A multiplex polymerase chain reaction (mPCR) method was developed to detect contamination of municipality-supplied drinking water with E. histolytica, G. lamblia, and Salmonella spp. The primers were designed to target small subunit of 16S rRNA type gene of E. histolytica and G. lamblia, and invasive A gene of Salmonella typhimurium. The optimized mPCR assay was applied on 158 municipality-supplied drinking water samples collected from Delhi. RESULTS: Out of total 158 water samples, 89 (56.32%) were found positive for the targeted pathogens by mPCR while conventional methods could be detected only in 11 (6.96%) samples. The mPCR assay showed 100% sensitivity and specificity for these pathogens in comparison with culture and microscopic detection. Of the 89 mPCR-positive samples, G. lamblia, E. histolytica, and Salmonella spp. were present in 35 (22.15%), 26 (16.45%), and 28 (17.72%), respectively. Nine (5.69%) samples were positive for both E. histolytica and G. lamblia, 10 (6.32%) were positive for G. lamblia and Salmonella spp., and 8 (5.06%) had Salmonella spp. and E. histolytica. Nonetheless, 3 (1.89%) samples were positive for all three pathogens. CONCLUSIONS: The present assay is an alternative to conventional methods to serve as highly sensitive, specific, and economical means for water quality surveillance to detect the outbreak caused by E. histolytica, G. lamblia, and Salmonella spp. pathogens.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Sekirov, Inna, Nicola M. Tam, Maria Jogova, Marilyn L. Robertson, Yuling Li, Claudia Lupp y B. Brett Finlay. "Antibiotic-Induced Perturbations of the Intestinal Microbiota Alter Host Susceptibility to Enteric Infection". Infection and Immunity 76, n.º 10 (4 de agosto de 2008): 4726–36. http://dx.doi.org/10.1128/iai.00319-08.

Texto completo

Resumen

ABSTRACT Intestinal microbiota comprises microbial communities that reside in the gastrointestinal tract and are critical to normal host physiology. Understanding the microbiota's role in host response to invading pathogens will further advance our knowledge of host-microbe interactions. Salmonella enterica serovar Typhimurium was used as a model enteric pathogen to investigate the effect of intestinal microbiota perturbation on host susceptibility to infection. Antibiotics were used to perturb the intestinal microbiota. C57BL/6 mice were treated with clinically relevant doses of streptomycin and vancomycin in drinking water for 2 days, followed by oral infection with Salmonella enterica serovar Typhimurium. Alterations in microbiota composition and numbers were evaluated by fluorescent in situ hybridization, differential plating, and Sybr green staining. Antibiotics had a dose-dependent effect on intestinal microbiota composition. The chosen antibiotic regimen did not significantly alter the total numbers of intestinal bacteria but altered the microbiota composition. Greater preinfection perturbations in the microbiota resulted in increased mouse susceptibility to Salmonella serovar Typhimurium intestinal colonization, greater postinfection alterations in the microbiota, and more severe intestinal pathology. These results suggest that antibiotic treatment alters the balance of the microbial community, which predisposes the host to Salmonella serovar Typhimurium infection, demonstrating the importance of a healthy microbiota in host response to enteric pathogens.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Momba, Maggy N. B., Veronica K. Malakate y Jacques Theron. "Abundance of pathogenic Escherichia coli, Salmonella typhimurium and Vibrio cholerae in Nkonkobe drinking water sources". Journal of Water and Health 4, n.º 3 (1 de abril de 2006): 289–96. http://dx.doi.org/10.2166/wh.2006.011.

Texto completo

Resumen

In order to study the prevalence of enteric pathogens capable of causing infection and disease in the rural communities of Nkonkobe, bacterial isolates were collected from several surface water and groundwater sources used by the community for their daily water needs. By making use of selective culture media and the 20E API kit, presumptive Escherichia coli, Salmonella spp. and Vibrio cholerae isolates were obtained and then analysed by polymerase chain reaction assays (PCR). The PCR successfully amplified from water samples a fragment of E. coli uidA gene that codes for β-D-glucuronidase which is a highly specific characteristic of enteropathogenic E. coli, enterotoxigenic E. coli and entero-invasive E. coli. The PCR also amplified the epsM gene from water samples containing toxigenic V. cholerae. Although E. coli was mostly detected in groundwater sources, toxigenic V. cholerae was detected in both surface and groundwater sources. There was a possibility of Salmonella typhimurium in Ngqele and Dyamala borehole water samples. The presence of these pathogenic bacteria in the above drinking water sources may pose a serious health risk to consumers.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Boehm, Alexandria B., Cherrie Soetjipto y Dan Wang. "Solar inactivation of four Salmonella serovars in fresh and marine waters". Journal of Water and Health 10, n.º 4 (11 de octubre de 2012): 504–10. http://dx.doi.org/10.2166/wh.2012.084.

Texto completo

Resumen

Sunlight-mediated disinfection of water is of interest to both the drinking and recreational water quality community of researchers due to its potential to reduce microbial contamination and waterborne illness. Photo-inactivation of enteric bacteria has primarily been investigated using Escherichia coli and laboratory strains of model bacteria. The present study sought to document the photo-inactivation of environmental isolates of Salmonella in filter-sterilized natural seawater and freshwater and to test the hypothesis that diverse Salmonella serovars decay at similar rates both within and between water matrices. The inactivation of Salmonella enterica Typhimurium LT2, Typhimurium ST19, Heidelberg, and Mbandaka was examined in sunlit and dark microcosms. First order decay was observed in sunlit microcosms; the time until 90% inactivation was of the order of 10 min. A significant shoulder, of the order of 1 hr in length, was observed in the freshwater microcosms during which concentrations were stable. Serovar Mdandaka decayed more slowly than other serovars in both seawater and freshwater. The serovars were extremely stable in the dark microcosms showing little to no decay over 53 days. The results document intra-species variation in photo-inactivation, likely owing to differences in intracellular concentrations of photo-sensitizing molecules or molecules that quench reactive species.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ailes, Elizabeth, Philip Budge, Manjunath Shankar, Sarah Collier, William Brinton, Alicia Cronquist, Melissa Chen, Andrew Thornton, Michael J. Beach y Joan M. Brunkard. "Economic and Health Impacts Associated with a Salmonella Typhimurium Drinking Water Outbreak−Alamosa, CO, 2008". PLoS ONE 8, n.º 3 (18 de marzo de 2013): e57439. http://dx.doi.org/10.1371/journal.pone.0057439.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Más fuentes

Tesis sobre el tema "Drinking water Salmonella typhimurium"

Burke, Lisa Mandy. "Fate of Salmonella Typhimurium in biofilms of drinking water distribution systems". Diss., Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-02232007-192747.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ison, Renny. "Factors affecting the survival of Salmonella typhimurium at reduced water activity". Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238631.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Akinleye, I. O. "The effect of water activity on the heat resistance of Salmonella typhimurium". Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308566.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Mafu, Nwabisa Charity. "Biodiversity of Salmonella strains isolated from selected water sources and wastewater discharge points in the Easern Cape Province of South Africa". Thesis, University of Fort Hare, 2008. http://hdl.handle.net/10353/74.

Texto completo

Resumen

In this study, the diversity of forty Salmonella isolates from selected drinking water and wastewater sources in the Eastern Cape Province of South Africa was assessed using parameters such as protein and lipopolysaccharide profile analysis, DNA fingerprinting and antibiotic susceptibility profile as test indices. Wastewater samples from Amalinda, Shornville and Fort Hare wastewater plants, and water samples from Gogogo and Tyume rivers were collected on ice and transported to the laboratory of the department of Microbiology and Biochemistry, University of Fort Hare for processing. The DNA dendograms of Salmonella and the applied UPGMA revealed 4 similarity groups of the strains. Most of the strains recovered from Amalinda, Shornville, Fort Hare wastewater plants, Gogogo and Tyume rivers show a high percentage of genetic similarity. On the other hand, protein dendograms of Salmonella isolates revealed 2 similarity groups which varied widely. Also, the lipopolysaccharide dendograms revealed three similarity groups with the first similarity groups showing a very high relatedness between strains from different water sources. The second similarity group included 16 strains which formed a rather homogenous group, and the third similarity group formed a distinct group. Of the seven antibiotics and sulfonamides tested against the Salmonella species, five namely, neomycin, chloramphenicol, kanamycin, streptomycin and cotrimoxazole were significantly inhibitory, while the bacteria showed considerable resistance to doxycycline and sulphamethoxazole. Our results based on restriction digestion, SDS/PAGE and dendogram construction show that there is a high similarity between the forty Salmonella strains studied, and that these methods are valuable tools for evaluating the relatedness ofSalmonella species. Our observations have proffered a veritable reference point on the diversity of Salmonella strains in the studied area.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Burkeen, Vedas K. "The efficacy of electrolyzed water for cleaning and sanitizing rubber picker fingers soiled with chicken fat and Salmonella Typhimurium". 2008. http://purl.galileo.usg.edu/uga%5Fetd/burkeen%5Fvedas%5Fk%5F200805%5Fphd.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Davidson, Melissa A. "Evaluation of Hot Water Wash Parameters to Achieve Maximum Effectiveness in Reducing Levels of Salmonella Typhimurium, Escherichia coli O157:H7 and coliforms/Escherichia coli on Beef Carcass Surfaces". Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7717.

Texto completo

Resumen

This study measured and compared different temperatures and dwell times of hot water treatment on the reduction of Escherichia coli O157:H7 and Salmonella Typhimurium on beef carcass surfaces. Two different types of beef surfaces, lean and fat, were inoculated with a fecal slurry containing E. coli O157:H7 and S. Typhimurium at ca. 7-log CFU/g, washed to remove gross fecal matter, and rinsed with hot water between 66 and 82 degrees C (150 to 180 degrees F water) for either 5, 10, or 15 s. There were no differences (P > 0.05) in the log reductions of S. Typhimurium and E. coli O157:H7 on the lean surfaces for all three temperature treatments (66, 74, and 82 degrees C). Although the 15 s treatment resulted in a numerically higher log reduction than the other treatments, each of the times resulted in at least a 1 log reduction of both S. Typhimurium and E. coli O157:H7 for lean surfaces. For the fat surfaces, all time treatments for the 82 degrees C and the 10 and 15 s treatments for the 74 degrees C resulted in the highest log reduction for S. Typhimurium. The 5 and 10 s dwell times for treatments at 66 degrees C and the 5 s dwell time at 74 degrees C resulted in the lowest log reduction of S. Typhimurium and E. coli O157:H7. For E. coli O157:H7 all temperature and time treatments resulted in at least a 1 log reduction for the fat surfaces of the outside round. Therefore, hot water treatment is a proven method for reducing both coliforms and pathogenic bacteria.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Capítulos de libros sobre el tema "Drinking water Salmonella typhimurium"

Overdier, D. G., S. Fletcher y L. N. Csonka. "Osmotic Control of Transcription of the proU Operon of Salmonella typhimurium". En Water and Life, 61–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-76682-4_5.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

M. Thanki, Anisha, Steve Hooton, Adriano M. Gigante, Robert J. Atterbury y Martha R.J. Clokie. "Potential Roles for Bacteriophages in Reducing Salmonella from Poultry and Swine". En Salmonella - a Challenge From Farm to Fork [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96984.

Texto completo

Resumen

This chapter discusses application of natural parasites of bacteria, bacteriophages (phages), as a promising biological control for Salmonella in poultry and swine. Many studies have shown phages can be applied at different points from farm-to-fork, from pre to post slaughter, to control the spread of Salmonella in the food chain. Pre-slaughter applications include administering phages via oral gavage, in drinking water and in feed. Post slaughter applications include adding phages to carcasses and during packaging of meat products. The research discussed in this chapter demonstrate a set of promising data that relate to the ability of phages to reduce Salmonella colonisation and abundance. Collectively the studies support the viability of phage as antimicrobial prophylactics and therapeutics to prevent and control Salmonella in the food chain.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Actas de conferencias sobre el tema "Drinking water Salmonella typhimurium"

Steichen, Quynn, Rex Smiley, Brian Fergen, Dianna Jordan, Kelly Lechtenberg, Troy Kaiser, Jessica Seate y Petra Maass. "Salmonella typhimurium fecal shedding following Salmonella choleraesuis-thyphimurium vaccination via drinking water and subsequent challenge". En Safe Pork 2015: Epidemiology and control of hazards in pork production chain. Iowa State University, Digital Press, 2017. http://dx.doi.org/10.31274/safepork-180809-354.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Augustine, Shancy, Pan Gu, Xiangjun Zheng, Toshikazu Nishida y Z. Hugh Fan. "Development of All-Plastic Microvalve Array for Multiplexed Immunoassay". En ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38154.

Texto completo

Resumen

There is a need for low-cost immunoassays that measure the presence and concentration of multiple harmful agents in one device. Currently, comparable immunoassays employ a one-analyte-per-test format that is time consuming and not cost effective for the requirement of detecting multiple analytes in a single sample. For instance, if a spectrum of harmful agents, including E. coli O157, cholera toxin, and Salmonella typhimurium, should be simultaneously monitored in foods and drinking water, then a one-analyte-per-test would be inefficient. This work demonstrates a platform capable of simultaneous detection of multiple analytes in a single, low-cost, microvalve array-enabled multiplexed immunoassay. This multiplexed immunoassay platform is demonstrated in a prototype COC (cyclic olefin copolymer) device with a 2×3 array in which 6 analytes can be detected simultaneously. In order to contain and regulate the flow of reagents in the multichannel device, an array of microfluidic valves actuated by a thermally expandable material and microfabricated resistors have been developed to direct the flow to the necessary assay sites. The microvalve-based immunoassay is shown to be reliable, easy to operate, and compatible with large-scale integration. The all-plastic microvalves use paraffin wax as the thermally sensitive material which drastically reduces power consumption by latching upon closing so that pulsed power is required only to close and latch the microvalve until it is necessary to re-open the valve. The multiplexed detection scheme has been demonstrated by using three proteins, C reactive protein (CRP) and transferrin, both of which are biomarkers associated with traumatic brain injury (TBI) as well as bovine serum albumin (BSA) as the negative control. Since there are no external bulky pneumatic accessories required to operate/latch the microvalves in the device, this compact, thermally actuated and latching microvalve-enabled multiplexed immunoassay has the potential to realize a portable, low power, battery operated microfluidic device for biological assays.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Du, Songtao, Shin Horikawa, I.-Hsuan Chen, Xu Lu, Yuzhe Liu y Bryan A. Chin. "Capture and identification of Salmonella Typhimurium from large volumes of water using phage filter". En Sensing for Agriculture and Food Quality and Safety X, editado por Moon S. Kim, Byoung-Kwan Cho, Bryan A. Chin y Kuanglin Chao. SPIE, 2018. http://dx.doi.org/10.1117/12.2304551.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Christiansen, Pia, Rikke Krag y Søren Aabo. "Effect of hot water and lactic acid decontamination on Escherichia coli, Salmonella Typhimurium and Yersinia enterocolitica on pork". En Eighth International Symposium on the Epidemiology and Control of Foodborne Pathogens in Pork. Iowa State University, Digital Press, 2009. http://dx.doi.org/10.31274/safepork-180809-855.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Gutierrez-Leon, Diana Guadalupe y Tomas Serrano-Ramirez. "Low Temperature Plasma by Corona discharge in water: lethal effect on Escherichia coli and Salmonella enterica serotype Typhimurium". En 2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT). IEEE, 2019. http://dx.doi.org/10.1109/icasat48251.2019.9069516.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Hansen, C. F., L. Jørgensen, J. Dahl y N. Kjeldsen. "Effect of formic acid in drinking water on the incidence of Salmonella in growing-finishing pigs". En Third International Symposium on the Epidemiology and Control of Salmonella in Pork. Iowa State University, Digital Press, 1999. http://dx.doi.org/10.31274/safepork-180809-1031.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

de Busser, E. V., J. Dewulf, Nathalie Nollet, K. Houf, K. Schwarzer, L. de Sadeleer, L. de Zutter y Dominiek Maes. "Effect of the use of organic acids in drinking water during the last two weeks prior to slaughter on salmonella shedding". En First International Symposium on the Ecology of Salmonella in Pork Production. Iowa State University, Digital Press, 2007. http://dx.doi.org/10.31274/safepork-180809-52.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

van der Wolf, P. J., F. W. van Schie, A. R. W. Elbers, W. A. Hunneman y M. J. M. Tielen. "Study plan and preliminary results of the intervention in the Salmonella status of finishing herds by adding organic acids to the drinking water of finishers". En Third International Symposium on the Epidemiology and Control of Salmonella in Pork. Iowa State University, Digital Press, 1999. http://dx.doi.org/10.31274/safepork-180809-1027.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Behkam, Bahareh y Metin Sitti. "E. Coli Inspired Propulsion for Swimming Microrobots". En ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59621.

Texto completo

Resumen

Medical applications are among the most fascinating areas of microrobotics. For long, scientists have dreamed of miniature smart devices that can travel inside the human body and carry out a host of complex operations such as minimally invasive surgery (MIS), highly localized drug delivery, and screening for diseases that are in their very early stages. Still a distant dream, significant progress in micro and nanotechnology brings us closer to materializing it. For such a miniature device to be injected into the body, it has to be 800 μm or smaller in diameter. Miniature, safe and energy efficient propulsion systems hold the key to maturing this technology but they pose significant challenges. Scaling the macroscale natation mechanisms to micro/nano length scales is unfeasible. It has been estimated that a vibrating-fin driven swimming robot shorter than 6 mm can not overcome the viscous drag forces in water. In this paper, the authors propose a new type of propulsion inspired by the motility mechanism of bacteria with peritrichous flagellation, such as Escherichia coli, Salmonella typhimurium and Serratia marcescens. The perfomance of the propulsive mechanism is estimated by modeling the dynamics of the motion. The motion of the moving organelle is simulated and key parameters such as velocity, distribution of force and power requirments for different configurations of the tail are determined theoretically. In order to validate the theoretical result, a scaled up model of the swimming robot is fabricated and characterized in silicone oil using the Buckingham PI theorem for scaling. The results are compared with the theoretically computed values. These robots are intended to swim in stagnation/low velocity biofluid and reach currently inaccessible areas of the human body for disease inspection and possibly treatment. Potential target regions to use these robots include eyeball cavity, cerebrospinal fluid and the urinary system.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!