Stephan G. Thayer
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View article: Enumeration of Salmonella and Campylobacter spp. in Environmental Farm Samples and Processing Plant Carcass Rinses from Commercial Broiler Chicken Flocks
Enumeration of Salmonella and Campylobacter spp. in Environmental Farm Samples and Processing Plant Carcass Rinses from Commercial Broiler Chicken Flocks Open
A prospective cohort study was performed to evaluate the prevalences and loads of Salmonella and Campylobacter spp. in farm and processing plant samples collected from 55 commercial broiler chicken flocks. Environmental samples were collec…
View article: Characterization of Fluoroquinolone Resistance among Veterinary Isolates of Avian <i>Escherichia coli</i>
Characterization of Fluoroquinolone Resistance among Veterinary Isolates of Avian <i>Escherichia coli</i> Open
Fluoroquinolone-resistant avian Escherichia coli isolates from northern Georgia were investigated for gyrA and parC mutations. All isolates contained a mutation in GyrA replacing Ser83 with Leu; seven isolates also contained mutations repl…
View article: Detection of Florfenicol Resistance Genes in<i>Escherichia coli</i>Isolated from Sick Chickens
Detection of Florfenicol Resistance Genes in<i>Escherichia coli</i>Isolated from Sick Chickens Open
Florfenicol is an antibiotic approved for veterinary use in cattle in the United States in 1996. Although this drug is not used in poultry, we have detected resistance to florfenicol in clinical isolates of avian Escherichia coli . Molecul…
View article: Incidence and Characterization of Integrons, Genetic Elements Mediating Multiple-Drug Resistance, in Avian <i>Escherichia coli</i>
Incidence and Characterization of Integrons, Genetic Elements Mediating Multiple-Drug Resistance, in Avian <i>Escherichia coli</i> Open
Antibiotic resistance among avian bacterial isolates is common and is of great concern to the poultry industry. Approximately 36% ( n = 100) of avian, pathogenic Escherichia coli isolates obtained from diseased poultry exhibited multiple-a…
View article: Evaluation of Cross-Contamination on Automatic Viscera Removal Equipment
Evaluation of Cross-Contamination on Automatic Viscera Removal Equipment Open
Contamination of poultry carcasses by fecal or ingested material is a major problem in the processing of poultry products. It was determined that the automatic equipment used to process uncontaminated carcasses could be used to clean and r…
View article: Multivalent Inactivated Virus Oil Emulsion Vaccines in Broiler Breeder Chickens
Multivalent Inactivated Virus Oil Emulsion Vaccines in Broiler Breeder Chickens Open
Inactivated Newcastle disease virus (NDV) and infectious bursal disease virus (IBDV) were incorporated into water-in-oil emulsion vaccines alone or as a bivalent vaccine. Twenty-week-old broiler breeder chickens that had received previous …
View article: Multivalent Inactivated Virus Oil Emulsion Vaccines in Broiler Breeder Chickens
Multivalent Inactivated Virus Oil Emulsion Vaccines in Broiler Breeder Chickens Open
Inactivated Newcastle disease (NDV), infectious bursal disease (IBDV), and viral arthritis/tenosynovitis (VA) viruses were incorporated into water-in-oil emulsion vaccines either alone, in bivalent combinations, or in a trivalent vaccine. …
View article: Multivalent Inactivated Virus Oil Emulsion Vaccines in Broiler Breeder Chickens
Multivalent Inactivated Virus Oil Emulsion Vaccines in Broiler Breeder Chickens Open
Inactivated Newcastle disease (NDV), infectious bursal disease (IBDV), and viral arthritis/tenosynovitis (VA) viruses were incorporated into water-in-oil emulsion vaccines, either alone, in bivalent combinations, or in a trivalent vaccine.…
View article: Vaccination of Broiler Chicks from Breeder Flocks Immunized with a Live or Inactivated Oil Emulsion Newcastle Disease Vaccine ,
Vaccination of Broiler Chicks from Breeder Flocks Immunized with a Live or Inactivated Oil Emulsion Newcastle Disease Vaccine , Open
One-day-old chicks used in this study were from breeder flocks vaccinated with live (B1 and LaSota) or inactivated oil emulsion Newcastle disease (ND) vaccine. Chicks were vaccinated against ND by various procedures. The vaccination respon…
View article: Further Studies with an Inactivated Oil Emulsion Newcastle Disease Vaccine in Broiler Breeders
Further Studies with an Inactivated Oil Emulsion Newcastle Disease Vaccine in Broiler Breeders Open
Chickens vaccinated with a live Newcastle disease (ND) vaccine and subsequently revaccinated with an inactivated oil emulsion ND vaccine had higher and more persistent hemagglutination-inhibition (HI) antibody titers than birds vaccinated …