|Headrick, Marcia - FDA-CVM|
|Dargatz, D - USDA-APHIS-VS-CEAH|
Submitted to: Poultry Science Association Meeting Abstract
Publication Type: Proceedings
Publication Acceptance Date: March 15, 2002
Publication Date: August 1, 2002
Citation: CRAY,P.J., HEADRICK,M., DARGATZ,D.A., GRAY,J.T., TANKSON,J.D., LADELY,S.R., MULTIPLE ANTIMICROBIAL RESISTANCE AMONG SALMONELLA ISOLATES ORIGINATING FROM POULTRY, POULTRY SCIENCE ASSOCIATION MEETING ABSTRACT, 2002. 80(SUPPL.): 439. (ABSTR.) Technical Abstract: Antimicrobial resistance to one antimicrobial presents an uncomplicated treatment option. However, development of resistance to more than one antimicrobial may complicate treatment options. Of particular concern is the development of resistance among food borne zoonotic pathogens. The animal arm of the National Antimicrobial Resistance Monitoring System - Enteric Bacteria (NARMS) monitors for developing antimicrobial resistance among Salmonella isolates of animal origin, particularly from chickens and turkeys. Salmonella isolates were collected from federally inspected slaughter and processing plants, on-farm studies, and veterinary diagnostic laboratories. Antimicrobial susceptibility testing was conducted using the Sensititre System (Trek Diagnostics) and a custom made antimicrobial panel. Data were analyzed for multiple antimicrobial resistance, defined as resistance to greater than or equal to 2 antimicrobials. Multiple resistance was observed most often among diagnostic isolates. However, serotypes varied widely between and within chicken and turkey isolates. Non-diagnostic serotypes from chicken were most often Salmonella Heidelberg, Kentucky, Hadar or Typhimurium while diagnostic serotypes were most often Salmonella Enteritidis, Heidelberg, Kentucky, Typhimurium, Tennessee or Hadar. Even more variability among serotypes from non-diagnostic and diagnostic isolates from turkeys was observed. Antimicrobial resistance, especially multiple resistance, varied widely among serotypes. Regardless of animal species surveyed or source surveyed, Typhimurium was both more resistant and the most multiple resistant serotype. These data indicate that multiple resistance is common among some serotypes of Salmonella but that serotype affects analysis of the data.