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Wondwossen Gebreyes

  • Professor, Veterinary Preventive Medicine
  • Exec Dir, Global One Health, Office of International Affair
  • Professor, COPH -Division of Epidemiology
  • 1920 Coffey Rd
    A0100r
    Columbus, OH 43210
  • 614-292-9559

Chapters

2010

  • Gebreyes WA. 2010. "Phenotypic subtyping of foodborne pathogens." In Tracing Pathogens in the Food Chain, edited by Stanley Brul et al., Cambridge: Woodhead Publishing.

2003

  • Cowen, P. D.E. Hansen, C.L. Hofacre, E.J. Noga, D.G. Pyburn, and W.A. Gebreyes. 2003. "Food Animal Industry Activites in Food Safety." In Microbial Food Safety in Animal Agriculture: Current Topics, 19 - 34. Ames: Blackwell Publishing.

Journal Articles

2010

  • Srinivasan V., Rajamohan G., Pancholi P., Stevenson K., Marcon M. and Gebreyes WA, 2010, "Molecular cloning and functional characterization of two novel membrane fusion proteins in conferring antimicrobial resistance in Acinetobacter baumannii." J. Antimicrobial Chemotherapy
  • Alali WQ, Thakur S., Berghaus R., Martin MP and Gebreyes WA, 2010, "Prevalence and Distribution of Salmonella in Organic and Conventional Broiler Poultry Farms." Foodborne Pathog Dis
  • Rajamohan G., Srinivasan V., and Gebreyes, WA, 2010, "Molecular and functional characterization of a novel efflux pump, AmvA, in mediating antimicrobial and disinfectant resistance in Acinetobacter baumannii." J. Antimicrobial Chemotherapy 65, no. 9, 1919 - 1925.
  • Rajamohan G, Srinivasan VB, Gebreyes WA, 2010, "Novel role of Acinetobacter baumannii RND efflux transporters in mediating decreased susceptibility to biocides." J Antimicrob Chemother 65, no. 2, 228 - 232.
  • Wittum TE, Mollenkopf DF, Daniels JB, Parkinson AE, Mathews JL, Fry PR, Abley MJ, and Gebreyes WA, 2010, "CTX-M-Type Extended-Spectrum b-Lactamases Present in Escherichia coli from the Feces of Cattle in Ohio, United States." FOODBORNE PATHOGENS AND DISEASE
  • Drozd M, Kassem H, Gebreyes W, Rajashekara G, 2010, "A quantitative polymerase chain reaction assay for detection and quantification of Lawsonia intracellularis." J Vet Diagn Invest 22, no. 2, 265 - 269.
  • Sibhat B, Molla Zewde B, Zerihun A, Muckle A, Cole L, Boerlin P, Wilkie E, Perets A, Mistry K, Gebreyes WA, 2010, "Salmonella Serovars and Antimicrobial Resistance Profiles in Beef Cattle, Slaughterhouse Personnel and Slaughterhouse Enviroment in Ethiopia." Zoonoses Public Health
  • Sopirala MM, Mangino JE, Gebreyes WA, Biller B, Bannerman T, Balada-Llasat JM, Pancholi P, 2010, "Synergy Testing by Etest(R), Microdilution Checkerboard, and Time-kill Methods for Pan Drug Resistant Acinetobacter baumannii." Antimicrob Agents Chemother
  • Patchanee P, Molla B, Line D, White N and Gebreyes WA, 2010, "Tracking Salmonella and various watersheds using phenotypic and genotypic approaches." Foodborne Pathog Dis 7, no. 9, 1113 - 1120.
  • Tadesse DA., Bahnson PB., Funk JA., Thakur S., Morrow WEM., Wittum T., DeGraves F., Rajala-Schultz PJ and Gebreyes WA, 2010, "Prevalence and Antimicrobial Resistance Profile of Campylobacter spp. Isolated from Conventional and Antimicrobial Free Production Systems from Different U.S. Regions." Foodborne Pathog Dis
  • Thakur S, Zhao S, McDermott PF, Harbottle H, Abbott J, English L, Gebreyes WA, White DG, 2010, "Antimicrobial Resistance, Virulence, and Genotypic Profile Comparison of Campylobacter jejuni and Campylobacter coli Isolated from Humans and Retail Meats." Foodborne Pathog Dis 7, no. 7, 835 - 844.
  • Thakur S, Putnam M, Fry PR, Abley M, Gebreyes WA, 2010, "Prevalence of antimicrobial resistance and association with toxin genes in Clostridium difficile in commercial swine." Am J Vet Res 71, no. 10, 1189 - 1194.
  • Molla B, Sterman A, Mathews J, Artuso-Ponte V, Abley M, Farmer W, Rajala-Schultz P, Morrow WE, Gebreyes WA, 2010, "Salmonella enterica in commercial swine feed and subsequent isolation of phenotypically and genotypically related strains in fecal samples." Appl Environ Microbiol
  • Mollenkopf, DM; KE Kleinhenz; JA Funk; WA Gebreyes; TE Wittum, 2010, "Salmonella enterica and Escherichia coli harboring blaCMY-2 in retail beef and pork products." Foodborne Pathogens and Disease

2009

  • Heider LC, Hoet AE, Wittum TE, Khaitsa ML, Love BC, Huston CL, Morley PS, Funk JA, Gebreyes WA, 2009, "Genetic and Phenotypic Characterication of the bla(CMY) Gene from Escherichia coli and Salmonella enterica Isolated from Food-Producing Animals, Humans, the Enviroment, and Retail Meat." Foodbourne Pathog Dis. 6, no. 10, 1235 - 1240.
  • Vijaya Bharathi Srinivasan, Govindan Rajamohan, Preeti Pancholi, Kurt Stevenson, Daniel A. Tadesse, Prapas Patchanee, Mario Marcon, Gebreyes WA, 2009, "Genetic relatedness and molecular charaterization of resistance determinants in multi-drug resistant Acinetobacter baumannii isolated in Central Ohio, USA." Annals of Clinical Microbiology and Antimicrobials 8, no. 21,
  • Govindan Rajamohan, Vijaya Srinivasan and Gebreyes WA, 2009, "Biocide-tolerant multi-drug resistant Acinetobacter baumannii clinical strains are associated with higher biofilm formation." J Hosp Infect 73, no. 3, 287 - 289.
  • Schissler J., Hillier A., Daniels J., Cole L. and Gebreyes WA, 2009, "Evaluation of Clinical Laboratory Standards Institute interpretive criteria for methicillin-resistant Staphylococcus pseudintermedius isolated from dogs." J Vet Diagnostic Investigation 21, no. 5, 684 - 688.
  • Alali WQ, Scott HM, Norby B, Gebreyes W, Loneragan GH, 2009, "Quantification of the Bla(CMY-2) in Feces from Beef Feedlot Cattle Administered Three Different Doses of Ceftiofur in a Longitudinal Controlled Field Trial." Foodbourne Pathogens Dis. 6, no. 8, 917 - 924.
  • Paul M. Dorr, Megan Nemechek, Alan B. Scheidt, Ronald E. Baynes, Gebreyes WA, Glen W. Almond, 2009, "Water-flow variation and pharmacoepidemiology of tetracycline hydrochloride administration via drinking water in swine finishing farms." JAVMA 235, no. 3, 299 - 304.
  • Heider LC, Funk JA, Hoet AE, Meiring RW, Gebreyes WA, Wittum TE, 2009, "Identification of Escherichia coli and Salmonella eterica organisms with reduced susceptibility to ceftriaxone from fecal samples of cows in dairy herds." Am J Vet Res. 70, no. 3, 389 - 393.
  • Rajala-Schultz PJ, Torres AH, Degraves FJ, Gebreyes WA, Patchanee P, 2009, "Antimicrobial resistance and genotypic characterization of coagulase-negative staphylococci over the dry period." Veterinary Microbiology 134, no. 1-2, 55 - 64.
  • Paul M. Dorr and Gebreyes WA, 2009, "Flavophospholipol: Effect on multi-drug resistant Salmonella enterica serovar Typhimurium in swine." J Swine Health and Production 17, no. 6, 308 - 317.
  • Zewde BM, Robbins RC, Abley MJ, House B, Morrow WEM, Gebreyes WA, 2009, "Comparison of Swiffer R wipes and conventional drag swabs in the recovery of Salmonella in swine production systems." J. Food Protection 72, no. 1, 142 - 146.
  • Gebreyes WA, Siddhartha Thakur, Paul Dorr, Daniel A. Tadesse, Karen Post and Leslie Wolf, 2009, "Occurence of virulence gene spvA and role on the clinical significance of multi-drug resistant Salmonella." J Clin Microbiol 47, no. 3, 777 - 780.
  • Pandya M, Wittum T, Tadesse DA, Gebreyes W, Hoet A, 2009, "Environmental Salmonella Surveillance in The Ohio State University Veterinary Teaching Hospital." Vector Bourne Zoonotiv Dis. 9, no. 6, 649 - 654.
  • Paul M. Dorr, Daniel A. Tadesse, Bayleyegn Molla Zewde, Siddhartha Thakur and Gebreyes WA, 2009, "Longitudinal Study on Salmonella dispersion and the role of enviromental contamination in commercial swine production systems." Applied Enviromental Microbiology 75, no. 6, 1478 - 1486.
  • Mengesha D, Molla Zewde D., Toquin MT, Kleer J, Hildebrandt G, Gebreyes WA, 2009, "Occurrence and Distribution of Listeria monocytogenes and Other Listerua Species in Ready-to-Eat and Raw Meat Products." Berl Munch Tierarztl Wochenschr 122, no. 1-2, 20 - 24.
  • Thakur, Siddhartha; White, David; McDermott, Patrick; Zhao, Shaohua; Harbottle, Heather; Gebreyes, WA; Abbott, Jason; English, Linda; Carter, Peggy; Kroft, Brenda; Lafon, Patti, 2009, "Genotyping of Campylobacter coli isolated from Humans and Retail Meats Using Multi Locus Sequence Typing and Pulsed Field Gel Electrophoresis." J Applied Microbiol 106, no. 5, 1722 - 1733.
  • Vijaya Bharathi Srinivasan, Govindan Rajamohan, and Gebreyes WA, 2009, "Role of AbeS, a novel efflux pump of the SMR family of transporters, in resistance to antimicrobial agents in Acinetobacter baumannii." Antimicrobial Agents and Chemotherapy 53, no. 12, 5312 - 5316.

2008

  • Gebreyes WA, Bahnson P., Funk JA, McKean J. and Patchanee P., 2008, "Seroprevalence of Trichinella, Toxoplasma, and Salmonella in Antimicrobial-free and Conventional Swine Production Systems." Foodbourne Pathogens and Diseases 5, no. 2, 199 - 203.
  • Patchanee P., Molla Zewde B., Tadesse D. and Gebreyes WA, 2008, "Characterization of multi-drug resistant Salmonella enterica servovar Heidelberg isolated from humans and animals." Foodbourne Pathogens and Diseases 5, no. 6, 839 - 851.
  • Hoet AE, Caswell RJ, Degraves FL, Rajala-Schultz PJ, Gebreyes WA, Saville WJ, WIttum TE., 2008, "A new approach to teaching veterinary public health at the Ohio State University.." J Vet Med Educ 35, no. 2, 160 - 165.
  • Heider LC, Meiring RW, Hoet AE, Gebreyes WA, Funk JA, Wittum TE, 2008, "Evaluation of vaccination with a commercial subunit vaccine on shedding of Salmonella enterica in subclinically infected dairy cows.." J Am Vet Med Assoc 233, no. 3, 466 - 469.

2007

  • Thakur, S; Tadesse, D; Morrow, WEM; Gebreyes, WA., 2007, "Occurrence of Multi-drug resistant Salmonella in antimicrobial-free swine production systems.." Vet. Microbiol 125, no. 3-4, 362 - 367.
  • Miller, O; Fuller, F, J; Gebreyes, W, A; Lewbart, G, A; Shchelkunov, I, S; Shivappa, R, B; Joiner, C; Woolford, G; Stone, D, M; Dixon, P, F; Raley, M, E; Levine, J F, 2007, "Phylogenetic analysis of spring virema of carp virus reveals distinct subgroups with common origins for recent isolates in North America and the UK.." Diseases of aquatic organisms 76, no. 3, 193 - 204.
  • Dorr, Paul, M; Baker, Rodney, B; Almond, Glen, W; Wayne, Spencer, R; Gebreyes, Wondwossen A, 2007, "Epidemiologic assessment of porcine circovirus type 2 coinfection with other pathogens in swine.." Journal of the American Veterinary Medical Association 230, no. 2, 244 - 250.
  • Siemon, Cedarose Ethel; Bahnson, Peter B.; Gebreyes, Wondwossen A., 2007, "Comparative investigations of prevalence and antimicrobial resistance of Salmonella between pasture and conventionally reared poultry." Avian Diseases 51, no. 1, 112 - 117.
  • Dorr, PM; Gebreyes, WA; Almond, G, 2007, "Porcine Reproductive and Respiratory Syndrome Virus: Age and management system disease modeling for pathogenic co-infection.." J. Swine Health Prod 15, no. 5, 258 - 263.

2006

  • Gebreyes, Wondwossen, A; Thakur, Siddhartha; Morrow, W E Morgan, 2006, "Comparison of prevalence, antimicrobial resistance, and occurrence of multidrug-resistant Salmonella in antimicrobial-free and conventional pig production.." Journal of food protection 69, no. 4, 743 - 748.
  • Thakur, Siddhartha; Morrow, W E Morgan; Funk, Julie, A; Bahnson, Peter, B; Gebreyes, Wondwossen A, 2006, "Molecular epidemiologic investigation of Campylobacter coli in swine production systems, using multilocus sequence typing.." Applied and environmental microbiology 72, no. 8, 5666 - 5669.
  • Gebreyes, W, A; Altier, C; Thakur, S, 2006, "Molecular epidemiology and diversity of Salmonella serovar Typhimurium in pigs using phenotypic and genotypic approaches.." Epidemiology and infection 134, no. 1, 187 - 198.

2005

  • Kong, Xiang, Q; Shea, Damian; Gebreyes, Wondwossen, A; Xia, Xin-Rui, 2005, "Novel hydrophobicity ruler approach for determining the octanol/water partition coefficients of very hydrophobic compounds via their polymer/solvent solution distribution coefficients.." Analytical chemistry 77, no. 5, 1275 - 1281.
  • Gebreyes, Wondwossen, A; Thakur, Siddhartha; Morrow, W E Morgan, 2005, "Campylobacter coli: prevalence and antimicrobial resistance in antimicrobial-free (ABF) swine production systems.." The Journal of antimicrobial chemotherapy 56, no. 4, 765 - 768.
  • Thakur, Siddhartha; Gebreyes, Wondwossen A, 2005, "Prevalence and antimicrobial resistance of Campylobacter in antimicrobial-free and conventional pig production systems.." Journal of food protection 68, no. 11, 2402 - 2410.
  • Thakur, Siddhartha; Gebreyes, Wondwossen A, 2005, "Campylobacter coli in swine production: antimicrobial resistance mechanisms and molecular epidemiology.." Journal of clinical microbiology 43, no. 11, 5705 - 5714.
  • Gebreyes, Wondwossen, A; Thakur, Siddhartha, 2005, "Multidrug-resistant Salmonella enterica serovar Muenchen from pigs and humans and potential interserovar transfer of antimicrobial resistance.." Antimicrobial agents and chemotherapy 49, no. 2, 503 - 511.

2004

  • Funk, J.A. and Gebreyes WA, 2004, "Risk Factors associated with Salmonella prevelence on swine farms." Journal of Swine Health Production 5, no. 12, 246 - 251.
  • Gebreyes, Wondwossen, A; Thakur, Siddhartha; Davies, Peter, R; Funk, Julie, A; Altier, Craig, 2004, "Trends in antimicrobial resistance, phage types and integrons among Salmonella serotypes from pigs, 1997-2000.." The Journal of antimicrobial chemotherapy 53, no. 6, 997 - 1003.
  • Gebreyes, Wondwossen, A; Davies, Peter, R; Turkson, Paa-Kobina; Morrow, W, E; Funk, Julie, A; Altier, Craig; Thakur, Siddhartha, 2004, "Characterization of antimicrobial-resistant phenotypes and genotypes among Salmonella enterica recovered from pigs on farms, from transport trucks, and from pigs after slaughter.." Journal of food protection 67, no. 4, 698 - 705.
  • Gebreyes, Wondwossen, A; Davies, Peter, R; Turkson, Paa-Kobina; Morrow, W, E; Funk, Julie, A; Altier, Craig, 2004, "Salmonella enterica serovars from pigs on farms and after slaughter and validity of using bacteriologic data to define herd Salmonella status.." Journal of food protection 67, no. 4, 691 - 697.

2003

  • Gebreyes WA, 2003, "Preharvest Food safety diagnostics for Salmonella serovars." Journal of Swine Health Production 3, no. 11, 141 - 145.
  • Gebreyes, W. Abebe; Thakur, S., 2003, "Molecular epidemiology of multidrug resistant Salmonella enterica serovar typhimurium isolated from swine and humans.." Infection Genetics and Evolution 2, no. 4, 277 -

2002

  • Gebreyes WA, Altier C, 2002, "Molecular characterization of multidrug-resistant Salmonella enterica subsp. enterica serovar Typhimurium isolates from swine." Journal of clinical microbiology 40, no. 8, 2813 - 2822.

2001

  • Funk, J, A; Davies, P, R; Gebreyes, W, 2001, "Risk factors associated with Salmonella enterica prevalence in three-site swine production systems in North Carolina, USA.." Berliner und Munchener tierarztliche Wochenschrift 114, no. 9-10, 335 - 338.

2000

  • Gebreyes, W, A; Davies, P, R; Morrow, W, E; Funk, J, A; Altier, C, 2000, "Antimicrobial resistance of Salmonella isolates from swine.." Journal of clinical microbiology 38, no. 12, 4633 - 4636.

Presentations

  • "Campylobacter and food safety issues at postharvest levels." 2005, Presented at Postharvest Needs Assessment Conference, Cincinnati,
  • "Antimicrobial resistance in swine enteric pathogens and control strategies." 2009, Presented at Symposium on control of enteric pathogens, Bakum, DE|DEU
  • "Public Health Aspects of Foodborne Diseases Related to Swine." 2002, Presented at Pork Quality and Safety Summit, Des Moines,
  • "Preliminary investigation of Methicillin resistant staphylococci in Paraiba, Brazil: a collaborative effort between OSU and UFPB.." 2009, Presented at National Semi Arid Institute Food Safety Workshop, Campina Grande, BR|BRA
  • "Molecular Epidemiology of Antimicrobial Resistance among Key Foodborne Pathogens.." 2009, Presented at Asia-Pacific Foodborne and Zoonoses Symposium,
  • "Molecular Epidemiology of Salmonellae in swine." 2001, Presented at Department of Veterinary Medicine, University of Maryland, College Park,
  • "Diversity of Foodborne Pathogens: Phenotypic and Genotypic Approaches." 2003, Presented at Livestock Insect Research Workers' Conference, Atlantic Beach,
  • "Prevalence and antimicrobial resistance in antimicrobial-free and conventional production systems." 2008, Presented at Ohio Environmental Council, Columbus,
  • "Passive surveillance of MRSA and other predominant pathogens in OSU-VTH." 2008, Presented at OSU-CVM Alumni reunion weekend continuing education conference, Columbus,
  • "Clostridium difficile: An emerging Zoonosis?." 2008, Presented at One Medicine Conference, Columbus,
  • "Prevalence and characterization of Methicillin Resistant Staphylococcus aureus (MRSA) in pigs and farm workers." 2008, Presented at National Pork Board, Des Moines,
  • "Salmonella and Antimicrobial Resistance: From Farm to the Genome." 2002, Presented at Department of Food Science, College of Agriculture and Life Sciences, NC State University, Raleigh,
  • "Research and training capacity building: veterinary public health in East Africa.." 2008, Presented at Center for African Studies at OSU,
  • "Molecular Epidemiology and Characterization of foodborne and nosocomial pathogens.." 2008, Presented at Molecular Medicine and Genomics in Africa, Khartoum, SD|SDN
  • "Antimicrobial use in food animals and association with antimicrobial resistance." 2008, Presented at Ohio Department of Agriculture,
  • "Food Safety and optimum production of food animals without the use of antimicrobials." 2007, Presented at Phytobiotics GMBH, Munich, DE|DEU
  • "Antimicrobial Use, Resistance, and Molecular Characterization of Salmonella isolated from swine." 2001, Presented at Department of Veterinary Anatomy and Public Health, Texas A&M University, College Station,
  • "Characterization of Foodborne Pathogens: Phenotypic and Genotypic Approaches." 2005, Presented at University of Cape Town, Department of Medical Microbiology, Cape Town,
  • "Antimicrobial use and antimicrobial resistance issues in Swine production systems." 2005, Presented at Food and Drug Administration, Center for Veterinary Medicine, Rockville,
  • "Workshop on Microbial Isolation/ Identification and Characterization." 2004, Presented at National Animal Health Research Center (NAHRC), Sebeta, ET|ETH
  • "Biocide use in swine production systems and association with multi-drug resistant Salmonella." 2008, Presented at USDA, Washington, D.C.,
  • "The Role of antimicrobial alternatives in Production immunologic and Gut Physiologic Parameters in Swine." 2009, Presented at Phytobiotics GMBH symposium, Rennes, FR|FRA
  • "Molecular Epidemiology of Antimicrobial resistance and Food Safety.." 2010, Presented at International Turkey Diseases Symposium, Berlin, DE|DEU
  • "Milk Quality in Goats: Technologic Advances and Capacity Needs." 2010, Presented at 10th International Goat Association Conference, Recife, BR|BRA
  • "Control and prevention of enteric pathogens using alternatives to antimicrobials.." 2010, Presented at Phytobiotics Symposium, Nuremberg, DE|DEU
  • "Molecular epidemiology and characterization of Campylobacter and Salmonella in swine and humans." 2005, Presented at FDA, Center for Veterinary Medicine, Laurel,
  • "Salmonella Serotypes that Cause Illness in Humans and Characterization." 2006, Presented at Special Presentation to USDA-FSIS technical and professional staff, Washington, US|USA
  • "Antimicrobial Resistance in Foodborne Pathogens." 2006, Presented at American Association of Swine Veterinarians (AASV) Annual Conference, Kansas City, US|USA
  • "Antimicrobial use and resistance in foodborne pathogens.." 2006, Presented at American Association for Veterinary Laboratory Diagnosticians (AAVLD), Minneapolis, US|USA
  • "Molecular Epidemiology of Salmonellae in swine." 2001, Presented at Department of Preventive Veterinary Medicine, Ohio State University, Columbus,
  • "Epidemiology of Salmonellae in swine: from farm to the genome." 2001, Presented at Food Animal Health Research Program, Ohio State University, Wooster,
  • "Truck wash practices and Salmonella dispersion in commercial swine production systems." 2007, Presented at Iowa State University, Ames,
  • "Epidemiology of hypervirulent Clostridium difficile in pigs and humans.." 2009, Presented at Midwest Veterinary Conference,
  • "Updates on current activities on food safety in the US pork industry." 2003, Presented at North Carolina Swine Veterinarians bimonthly Meeting, Kenansville,
  • "Source, Diversity and Resistance of Foodborne Pathogens in Swine and Pork." 2003, Presented at Salmonella Working Group Meeting, Des Moines,
  • "Antimicrobial resistance among swine Salmonella and Campylobacter and Molecular Epidemiology of Multi-drug Resistance." 2004, Presented at University of Bristol, School of Veterinary Medicine, GB|GBR
  • "Comparative epidemiology, toxino- and genotyping of Clostridium difficile isolated from swine and humans.." 2007, Presented at Joint NPB/CDC and USDA symposium on C. difficile, Chicago, US|USA
  • "Core Fingerprinting Technologies for Subtyping Foodborne Pathogens." 2003, Presented at FUTURES Biotechnology and Biodiversity Seminar Series, Greensboro,
  • "Update on international initiative on harmonization of sampling methods and culturing techniques for Salmonella." 2003, Presented at National Pork Board, Des Moines,
  • "Review of the 12th International Symposium on Campylobacter, Helicobacter and Related Organisms." 2003, Presented at National Pork Board, Des Moines,
  • "Prevalence and Antibiotic Resistance of Campylobacter among Antimicrobial free and conventional Swine Herds." 2004, Presented at Pork Quality and Safety Summit, Des Moines,
  • "Antimicrobial Resistance and Molecular Epidemiology of Salmonella in Swine and Humans." 2002, Presented at Department of Microbiology, College of Agriculture and Life Sciences, NC State University, Raleigh,
  • "Diversity of Foodborne Pathogens: Phenotypic and Genotypic Approaches." 2003, Presented at Ethiopian Health and Nutrition Research Institute, Addis Ababa, ET|ETH
  • "Diversity of Foodborne Pathogens: Phenotypic and Genotypic Approaches." 2003, Presented at Addis Ababa University, Faculty of Veterinary Medicine, Debre Zeit, ET|ETH
  • "Antimicrobial Resistance of Foodborne Pathogens and Genotypic Approaches." 2003, Presented at National Animal Health Research Center, Sebeta,

Papers in Proceedings

2010

  • W.A. Gebreyes, Molla, Z. B., M. Abley, S. Thakur, C. Jackson, P. Fedorka-Cray "Methicillin resistant staphylococci (MRS+) in pigs and farm workers. 2nd ASM Conference on Antimicrobial Resistance in Zoonotic Bacteria and Foodborne Pathogens in Animals, Humans and the Environment." in 2nd ASM Conference on Antimicrobial Resistance in Zoonotic Bacteria and Foodborne Pathogens in Animals, Humans and the Environment. Toronto, (1 2010).
  • W. A. Gebreyes, Molla, Z. B., M. J. Abley, V. Artuso-Ponte, W. Farmer, C. Martin, W. E. M. Morrow, P. Rajala-Schultz "Antimicrobial resistance and association with biocide in Salmonella enterica in conventional swine production environment." in 2nd ASM Conference on Antimicrobial Resistance in Zoonotic Bacteria and Foodborne Pathogens in Animals, Humans and the Environment. Toronto, (1 2010).
  • Mathews, J., Tiao, N. Patchanee, P., and Gebreyes, W.A. "Passive Surveillance and Genotyping of Methicillin Resistant Staphylococci at OSU Veterinary Medical Center." in 2nd ASM Conference on Antimicrobial Resistance in Zoonotic Bacteria and Foodborne Pathogens in Animals, Humans and the Environment. Toronto, (1 2010).

2009

  • Zewde M. B., M. J. Abley, V. P. Artuso, W. Farmer, C. Martin, W. E. M. Morrow, P. Rajala-Schultz, W. A. Gebreyes "Association between biocide use and antimicrobial resistance of Salmonella in swine production environment." in 8th International Symposium on Epidemiology and Control of Foodborne Patogens in Pork. (1 2009).
  • Gebreyes, W. A., Drobotij, M., Zewde, M. B. and Abley, M "Prevalence of Methicillin-resistant Staphylococcus aureus (MRSA) in Pigs and Farm Workers." in 96th Annual Meeting of the International Association of Food Protection. Grapevine, (1 2009).
  • J. Mathews, N. Tiao, P. Patchanee, J. Daniels, A. Hillier, C. Kohn and W.A. Gebreyes. "Phenotypic and Genotypic Characterization of Staphylococci Isolates Collected from OSU Veterinary Teaching Hospital." in 60th American College of Veterinary Pathologists Conference. Monterey, (1 2009).
  • Thakur, S, Zewde, M. B., Gebreyes, W. "Phenotypic heterogeneity of Campylobacter coli isolated from conventional and antimicrobial free swine at farm and slaughter." in 8th International Symposium on Epidemiology and Control of Foodborne Pathogens in Pork. (1 2009).
  • Molla Z. B., M. J. Abley, V.P. Artuso, W. Farmer, C. Martin, J. Mathews, W. E. M. Morrow, A. Sterman, P. Rajala-Schultz, W. A. Gebreyes "Biocide Use and Association with Antimicrobial Resistance of Salmonella Recovered in Swine Barn Floors." in 96th Annual Meeting of the International Association of Food Protection. Grapevine, (1 2009).
  • P. Fry, M. Sullivan, M. Abley, S. Thakur, M. Marcon, W. Gebreyes. "Hypervirulent Strains of Clostridium difficile of Porcine and Human Origin and Risk to Pork Safety." in 8th International Symposium of the Epidemiology and Control of Foodborne pathogens in Pork.. Quebec City, (1 2009).
  • Drobotij, M., B.M. Zewde, M.J. Abley, C. Jackson and W.A. Gebreyes "Prevalence of methicillin resistant staphylococci (MRS+) in pigs and farm workers.." in 8th International Symposium on Epidemiology and Control of Foodborne Pathogens in Pork. (1 2009).

2008

  • N. Tiao, L. Filho, C. Bruno and Gebreyes WA "Phenotypic and Genotypic analysis of Staphylococcus spp. from raw bovine milk in Northeastern Brazil." in Int’l Association for Food Protection Congress. Columbus, (1 2008).
  • Gebreyes WA*, V. Srinivasan, G. Rajamohan, P. Pancholi, K. Stevenson, M. Marcon "Novel Secondary Active Transporters Conferring Antimicrobial Resistance in Acinetobacter baumannii With Broad Substrate Specificity." in 48th Interscience Conference on Antimicrobial Agents and Chemotherapy (ICAAC). Washington, (1 2008).
  • Daniel A. Tadesse, Peter B. Bahnson, Julie A. Funk, W.E. Morgan Morrow and Gebreyes WA "Molecular epidemiology and characterization of virulence gene in Y. enterocolitcia isolated from swine." in Int’l Association for Food Protection Congress. Columbus, (1 2008).
  • W. A. Gebreyes, Bayleyegn Molla Zewde, Melanie J. Abley, Brandon House, W.E. Morgan Morrow, Rebecca Robbins. "Distribution of Salmonella in swine and swine production environment before and after disinfection of barns." in Int’l Pig Veterinarian Society Congress (IPVS). (1 2008).
  • Gebreyes WA*, N. Tiao, C. Bruno, L. Santos Filho "Occurrence of methicillin resistant Staphylococcus aureus (MRSA) in Milk in Northeastern Brazil." in 48th Interscience Conference on Antimicrobial Agents and Chemotherapy (ICAAC). Washington, (1 2008).
  • Gebreyes WA, Patchanee P, White N, Line D and Shea D "Identification of sources of Salmonella in watersheds and characterization of multiple antimicrobial resistant strains.." in Nattional Water Conference. Sparks, (1 2008).
  • Prapas Patchanee, Daniel Tadesse and Gebreyes WA "Phenotypic and genotypic characterization of multi-drug resistant Salmonella serotype Heidelberg isolated from humans and animals." in Int’l Association for Food Protection Congress. Columbus, (1 2008).
  • W. A. Gebreyes, D. A. Tadesse, M. Abley, P. Bahnson, J. Funk, M. Morrow. "Molecular epidemiology and virulence genes characterization in Yersinia enterocolitcia of Porcine Origin." in International Pig Veterinarian Society (IPVS) Congress. (1 2008).
  • Pamela Fry, Melanie Abley, Neely Kaydos-Daniels, Paula Cray, Gebreyes WA "Comparison of antimicrobial resistance determinants among Salmonella, Campylobacter, E. coli, and Enterococcus isolated from Swine." in Int’l Association for Food Protection Congress. Columbus, (1 2008).
  • Bayleyegn Zewde, W.E. Morgan Morrow, Rebecca Robbins, Gebreyes WA "Comparison of swiffer® wipes and conventional drag swab methods in the recovery of Salmonella from swine production environment." in Int’l Association for Food Protection Congress. Columbus, (1 2008).
  • P. Fry, M. Abley, S. Kaydos-Daniels, P. Cray, J. Frye, Gebreyes WA "Characterization of Antimicrobial Resistance Determinants among Salmonella, Campylobacter, Escherichia, and Enterococcus using PCR and Microarray Approaches." in 48th Interscience Conference on Antimicrobial Agents and Chemotherapy (ICAAC). Washington, (1 2008).
  • W. A. Gebreyes, Prapas Patchanee., Nancy White., Daniel E. Line, Damian Shea "Identification of Sources of Salmonella in Watersheds associated with Swine Production and Characterization of Multiple Antimicrobial Resistant Strains." in Pig Veterinarian Society (IPVS) Congress. (1 2008).

2007

  • W.A. Gebreyes, K. B. Stevenson, P. Pancholi, M.Marcon "Antimicrobial Resistance in Pseudomonas aeruginosa and Acinetobacter spp." in 47th Interscience conference on Antimicrobial Agents and Chemotherapy (ICAAC). Chicago, (1 2007).
  • W. A. Gebreyes and P. M. Dorr. "Truck wash practices and Salmonella dispersion in commercial swine production systems." in Swine Diseases Conference. (1 2007).
  • N. Tiao, A.Hoet, A. Hillier, W.A. Gebreyes "SCC-mec typing of staphylococci isolated from veterinary teaching hospital." in 47th Interscience conference on Antimicrobial Agents and Chemotherapy (ICAAC). Chicago, (1 2007).

2006

  • Gebreyes, W A, Bahnson, PB, Funk, JA, Morrow, WEM "ANTIMICROBIAL RESISTANCE OF THREE MAJOR FOODBORNE PATHOGENS AMONG PIGS REARED IN CONVENTIONAL AND ANTIMICROBIAL-FREE ENVIRONMENT IN THREE GEOGRAPHIC LOCATIONS IN THE UNITED STATES." in International Pig Veterinary Society Congress. Copenhagen, (1 2006).
  • Robbins, RC and Gebreyes, WA "DEVELOPMENT OF ASSAY DETECTING SALMONELLA TYPHIMURIUM FROM FECES USING QUANTITATIVE PCR." in International Pig Veterinary Society Congress. Copenhagen, (1 2006).
  • Robbins, RC and Gebreyes, WA "ANTIMICROBIAL ACTIVITY OF COPPER SULFATE, BORON, AND SANGUINARINE AGAINST MULTI-DRUG RESISTANT SALMONELLA ISOLATED FROM SWINE." in International Pig Veterinary Society Congress. Copenhagen, (1 2006).

2005

  • Thakur, S. and Gebreyes, W.A. "Comparative genotyping of Campylobacter coli using Multi Locus Sequence Typing and Pulsed Field Gel Electrophoresis." in 6th International Symposium on Epidemiology and Control of Food-borne pathogens in Pork. Rohnert Park, (1 2005).
  • Thakur, S. and Gebreyes, W.A. "Prevalence, antimicrobial resistance and genotypic diversity of Campylobacter coli isolated from antimicrobial-free swine production systems." in 6th International Symposium on Epidemiology and Control of Food-borne pathogens in Pork. Rohnert Park, (1 2005).
  • Dorr, P. and Gebreyes, W.A. "The Role of Truck-wash Practices in Dissemination of Salmonella and Campylobacter in Commercial Swine Production." in International Symposium on Epidemiology and Control of Food-borne pathogens in Pork. Rohnert Park, (1 2005).
  • Davies, P., Funk, J. and Gebreyes, W.A. "Differential translocation of Salmonella serovars to mesenteric lymph nodes of pigs." in 6th International Symposium on Epidemiology and Control of Food-borne pathogens in Pork. Rohnert Park, (1 2005).
  • Gebreyes, W.A., Thakur, S. and Morrow, M.W.E "Prevalence and antimicrobial resistance of Salmonella isolated from conventional and antimicrobial-free swine herds in North Carolina." in 6th International Symposium on Epidemiology and Control of Food-borne pathogens in Pork. Rohnert Park, (1 2005).
  • Dorr, P., Tadesse, D. and Gebreyes, W.A. "Evaluation of Phenotypic and Genotypic Approaches as predictors of Salmonella strains of Clinical and Non-clinical Origin." in 6th International Symposium on Epidemiology and Control of Food-borne pathogens in Pork. Rohnert Park, (1 2005).
  • Robbins, R., Lowman, H. and Gebreyes, W. A. "Developing Real-time PCR Assay for Detection of Multi-drug Resistant Salmonella strains in Pigs." in 6th International Symposium on Epidemiology and Control of Food-borne pathogens in Pork. Rohnert Park, (1 2005).