Research Topics
| Wondwossen A GebreyesSummaryAffiliation: The Ohio State University Country: USA Publications
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Detail Information
Publications
Seroprevalence of Trichinella, Toxoplasma, and Salmonella in antimicrobial-free and conventional swine production systemsWondwossen A Gebreyes
College of Veterinary Medicine, Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, Ohio 43210, USA
Foodborne Pathog Dis 5:199-203. 2008....- Occurrence of spvA virulence gene and clinical significance for multidrug-resistant Salmonella strainsWondwossen A Gebreyes
The Ohio State University, College of Veterinary Medicine, Department of Veterinary Preventive Medicine, Columbus, Ohio, USA
J Clin Microbiol 47:777-80. 2009..The findings suggest that MDR strains that also carry specific virulence factors are more likely to be of clinical significance... - Genetic and phenotypic characterization of the bla(CMY) gene from Escherichia coli and Salmonella enterica isolated from food-producing animals, humans, the environment, and retail meatLuke C Heider
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA
Foodborne Pathog Dis 6:1235-40. 2009..Of the 20 genes obtained from Salmonella isolates, 8 (40%) were found to be homologous to bla(CMY-2), with no altered susceptibility phenotypes observed... - Molecular epidemiologic investigation of Campylobacter coli in swine production systems, using multilocus sequence typingSiddhartha Thakur
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606, USA
Appl Environ Microbiol 72:5666-9. 2006..Sequence type (ST) 1413 was predominant and observed among ciprofloxacin-resistant strains. We identified a C. coli ST 828 clonal complex consisting of isolates from both production systems... - Characterization of multidrug-resistant Salmonella enterica serovar Heidelberg isolated from humans and animalsPrapas Patchanee
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA
Foodborne Pathog Dis 5:839-51. 2008..The findings in this study indicate the increasing significance of swine as reservoirs of emerging MDR serovars, such as MDR Salmonella Heidelberg, is of public health significance... - Characterization of antimicrobial-resistant phenotypes and genotypes among Salmonella enterica recovered from pigs on farms, from transport trucks, and from pigs after slaughterWondwossen A Gebreyes
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USA
J Food Prot 67:698-705. 2004..Class I integrons were also common among various serovars... - CTX-M-type extended-spectrum ?-lactamases present in Escherichia coli from the feces of cattle in Ohio, United StatesThomas E Wittum
Veterinary Preventive Medicine, The Ohio State University, Columbus, Ohio 43210, USA
Foodborne Pathog Dis 7:1575-9. 2010..Transferrable bla(CTX-M) genes in bovine E. coli have the potential to serve as a reservoir of resistance for pathogens and may represent a public health concern... - Antimicrobial resistance, virulence, and genotypic profile comparison of Campylobacter jejuni and Campylobacter coli isolated from humans and retail meatsSiddhartha Thakur
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27606, USA
Foodborne Pathog Dis 7:835-44. 2010..jejuni and C. coli isolates indicate that there are sources other than retail meats that may also contribute to human Campylobacter infections... - Identification of Escherichia coli and Salmonella enterica organisms with reduced susceptibility to ceftriaxone from fecal samples of cows in dairy herdsLuke C Heider
Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210, USA
Am J Vet Res 70:389-93. 2009..To estimate the relationship between therapeutic use of ceftiofur and recovery of Escherichia coli and Salmonella spp with reduced susceptibility to ceftriaxone from feces of dairy cattle... - Trends in antimicrobial resistance, phage types and integrons among Salmonella serotypes from pigs, 1997-2000Wondwossen A Gebreyes
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, NC 27606, USA
J Antimicrob Chemother 53:997-1003. 2004..The objectives of this study were to determine antimicrobial resistance and to identify phage types and class 1 integrons among non-typhoidal Salmonella isolates from 24 pig farms in North Carolina collected between 1997 and 2000... - Comparison of prevalence, antimicrobial resistance, and occurrence of multidrug-resistant Salmonella in antimicrobial-free and conventional pig productionWondwossen A Gebreyes
College of Veterinary Medicine, Department of Population Health and Pathobiology, North Carolina State University, Raleigh 27606, USA
J Food Prot 69:743-8. 2006..A longitudinal study with a representative sample size is needed to reach more conclusive results of the associations detected in this study... - Genetic relatedness and molecular characterization of multidrug resistant Acinetobacter baumannii isolated in central Ohio, USAVijaya B Srinivasan
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, Columbus, Ohio, USA
Ann Clin Microbiol Antimicrob 8:21. 2009..The aim of the present study was to determine the clonal relatedness of clinical isolates and to elucidate the genetic basis of imipenem resistance... - Salmonella enterica in commercial swine feed and subsequent isolation of phenotypically and genotypically related strains from fecal samplesBayleyegn Molla
The Ohio State University, College of Veterinary Medicine, Department of Veterinary Preventive Medicine, 1920 Coffey Rd, Columbus, OH 43210, USA
Appl Environ Microbiol 76:7188-93. 2010.... - Molecular and functional characterization of a novel efflux pump, AmvA, mediating antimicrobial and disinfectant resistance in Acinetobacter baumanniiGovindan Rajamohan
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, Columbus, OH, USA
J Antimicrob Chemother 65:1919-25. 2010..The aim of this study was to elucidate the role of a novel efflux pump in A. baumannii... - Comparison of Swiffer wipes and conventional drag swab methods for the recovery of Salmonella in swine production systemsBayleyegn Molla Zewde
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, 1920 Coffey Road, Columbus, Ohio 43210, USA
J Food Prot 72:142-6. 2009..Pentaresistant Salmonella (mainly R-type ACSSuT) was more common in fecal samples than in environmental samples... - Campylobacter coli in swine production: antimicrobial resistance mechanisms and molecular epidemiologySiddhartha Thakur
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough St, Raleigh, NC 27606, USA
J Clin Microbiol 43:5705-14. 2005..coli strains exhibiting resistance to ciprofloxacin and erythromycin are concerning, since these are the drugs of choice for treating invasive campylobacteriosis cases in humans... - Salmonella enterica and Escherichia coli harboring blaCMY in retail beef and pork productsDixie F Mollenkopf
Veterinary Preventive Medicine, The Ohio State University, Columbus, OH 43210, USA
Foodborne Pathog Dis 8:333-6. 2011..However, we did not quantify the number of resistant bacteria present in these products, which makes the public health implications of this result unclear... - Prevalence and antimicrobial resistance of Campylobacter in antimicrobial-free and conventional pig production systemsSiddhartha Thakur
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USA
J Food Prot 68:2402-10. 2005..coli in both conventional and ABF pig production systems and have significant implications for the persistence of antimicrobial-resistant Campylobacter in the pig production environment regardless of levels of antimicrobial use... - Tracking salmonella contamination in various watersheds and phenotypic and genotypic diversityPrapas Patchanee
Department of Veterinary Preventive Medicine, The Ohio State University, Columbus, Ohio 43210, USA
Foodborne Pathog Dis 7:1113-20. 2010..While swine-production-associated water samples were not found to have a disproportionately high prevalence, it was the most important reservoir of multidrug-resistant strains... - Role of AbeS, a novel efflux pump of the SMR family of transporters, in resistance to antimicrobial agents in Acinetobacter baumanniiVijaya Bharathi Srinivasan
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, Columbus, OH 43210, USA
Antimicrob Agents Chemother 53:5312-6. 2009..Deletion of the abeS gene in A. baumannii confirmed its role in conferring resistance to these compounds... - Novel role of Acinetobacter baumannii RND efflux transporters in mediating decreased susceptibility to biocidesGovindan Rajamohan
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
J Antimicrob Chemother 65:228-32. 2010..We investigated the biocide susceptibilities of a rapidly emerging pathogen, Acinetobacter baumannii, and the underlying molecular mechanisms, with a primary focus on resistance-nodulation-cell division (RND) efflux systems... - Multidrug-resistant Salmonella enterica serovar Muenchen from pigs and humans and potential interserovar transfer of antimicrobial resistanceWondwossen A Gebreyes
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough St, Raleigh, NC 27606, USA
Antimicrob Agents Chemother 49:503-11. 2005..The MDR strains from the two host species independently represent public health concerns, as Salmonella serovar Muenchen is among the top 10 causes of salmonellosis in humans... - Molecular cloning and functional characterization of two novel membrane fusion proteins in conferring antimicrobial resistance in Acinetobacter baumanniiVijaya Bharathi Srinivasan
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, Columbus, OH, USA
J Antimicrob Chemother 66:499-504. 2011..The aim of this study was to elucidate the role of two novel membrane fusion proteins (MFPs) in the susceptibility of Acinetobacter baumannii to antimicrobial agents... - Campylobacter coli: prevalence and antimicrobial resistance in antimicrobial-free (ABF) swine production systemsWondwossen A Gebreyes
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough St, Raleigh, NC 27606, USA
J Antimicrob Chemother 56:765-8. 2005..In the ABF system, antimicrobials are neither used for growth promotion nor therapeutic purposes... - Evaluation of vaccination with a commercial subunit vaccine on shedding of Salmonella enterica in subclinically infected dairy cowsLuke C Heider
Department of Veterinary Preventative Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
J Am Vet Med Assoc 233:466-9. 2008..To estimate the efficacy of a commercially available Salmonella enterica subunit vaccine on the subclinical shedding of S enterica in dairy cattle... - Prevalence of antimicrobial resistance and association with toxin genes in Clostridium difficile in commercial swineSiddhartha Thakur
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University Raleigh, NC 27606, USA
Am J Vet Res 71:1189-94. 2010..To estimate prevalence and determine association between antimicrobia resistance and toxin gene profile of Clostridium difficile in commercial pigs at the preharvest food-safety level... - Synergy testing by Etest, microdilution checkerboard, and time-kill methods for pan-drug-resistant Acinetobacter baumanniiMadhuri M Sopirala
The Ohio State University Medical Center, University Hospital East, 1492 E Broad Street, Columbus, OH 43205, USA
Antimicrob Agents Chemother 54:4678-83. 2010..These findings indicate the utility of synergy testing to predict activity of specific antibiotic combinations against PDR A. baumannii... - Comparative investigation of prevalence and antimicrobial resistance of Salmonella between pasture and conventionally reared poultryCedarose Ethel Siemon
The Ohio State University, College of Veterinary Medicine, Department of Preventive Veterinary Medicine, 1920 Coffey Road, Columbus, OH 43210, USA
Avian Dis 51:112-7. 2007..None of the isolates from Wisconsin were found to be multidrug resistant... - Variation in daily shedding patterns of Staphylococcus aureus in naturally occurring intramammary infectionsJennifer B Walker
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, Ohio State University, Columbus, OH, USA
J Vet Diagn Invest 23:1114-22. 2011..The current study examining naturally occurring intramammary infections would support the conclusions of other studies suggesting that a single quarter sample would be adequate in determining S. aureus intramammary infections status... - A new approach to teaching veterinary public health at the Ohio State UniversityArmando E Hoet
Department of Veterinary Preventive Medicine, The Ohio State University, 1920 Coffey Road, Columbus, OH 43210 USA
J Vet Med Educ 35:160-5. 2008..The program has been successful in attracting students from the primary target population, but it has also attracted students wanting the MPH as a terminal degree and veterinarians returning to school to expand their career options... - Environmental methicillin-resistant Staphylococcus aureus in a veterinary teaching hospital during a nonoutbreak periodArmando E Hoet
Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA
Vector Borne Zoonotic Dis 11:609-15. 2011..This study also identified specific surfaces in a veterinary environment that need to be targeted when designing and executing infection control programs... - Salmonella enterica serovars from pigs on farms and after slaughter and validity of using bacteriologic data to define herd Salmonella statusWondwossen A Gebreyes
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USA
J Food Prot 67:691-7. 2004..The findings further imply that slaughter plant studies based on phenotyping of Salmonella alone (such as serovars) may not reliably indicate the Salmonella status of commercial swine farms... - Epidemiologic assessment of porcine circovirus type 2 coinfection with other pathogens in swinePaul M Dorr
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606, USA
J Am Vet Med Assoc 230:244-50. 2007..To identify important pathogens and characterize their serologic and pathologic effects in porcine circovirus type 2 (PCV2)-infected pigs in relation to pig age and type of swine production system... - Evaluation of Clinical Laboratory Standards Institute interpretive criteria for methicillin-resistant Staphylococcus pseudintermedius isolated from dogsJennifer R Schissler
Department of Veterinary Clinical Science, The Ohio State University, Columbus, OH, USA
J Vet Diagn Invest 21:684-8. 2009..Our findings also suggest that cefoxitin disk diffusion is an inappropriate screening test for methicillin resistance of canine S. pseudintermedius... - Occurrence of multidrug resistant Salmonella in antimicrobial-free (ABF) swine production systemsSiddhartha Thakur
Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, US Food and Drug Administration, Laurel, MD 20708, USA
Vet Microbiol 125:362-7. 2007..In addition, it also highlights the possible role played by slaughterhouse and other environmental factors in the contamination and dissemination of antimicrobial resistant Salmonella in ABF production systems...