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Title: ANIMAL ARM OF NARMS RECOVERY OF SALMONELLA HEIDELBERG FROM 1998-2003

Author
item Tankson, Jeanetta
item Cray, Paula
item HEADRICK, MARCIA - FDA/CVM

Submitted to: National Foundation for Infectious Disease
Publication Type: Abstract Only
Publication Acceptance Date: 4/27/2005
Publication Date: 6/27/2005
Citation: Tankson, J.D., Cray, P.J., Headrick, M.L. 2005. Animal arm of narms recovery of salmonella heidelberg from 1998-2003. National Foundation for Infectious Disease. Abstract. P2. P. 38.

Interpretive Summary:

Technical Abstract: Over 2500 different serotypes of Salmonella have been identified. Results from the animal arm of the National Antimicrobial Resistance Monitoring System – Enteric Bacteria (NARMS) located in Athens, GA, indicate that Salmonella Heidelberg has appeared among the top 5 most prevalent serotypes recovered from various animal sources from 1998-2003. In this study, we evaluated 160 Salmonella Heidelberg isolates recovered between 1998-2003 exhibiting an MIC >/= 2 'g/ml and 64 'g/ml, respectively. Total numbers of isolates by species were chicken (n=116; 73%), turkey (n=16; 10%), cattle (n=23; 14%), swine (n=3; 2%), and eggs (n=2; 1%). Collectively, isolates were geographically diverse in that they were recovered from all five designated NARMS regions of the US; 49 (30%) isolates from the Northeast, 44 (28%) isolates from the Southeast, 13 (8%) isolates from the North Central, 43 (27%) isolates from the South Central, and 6 (4%) isolates from the West. Antimicrobial susceptibility testing indicated that 159 (99%) isolates exhibited multiple drug resistance (MDR; defined as resistance to 2 or more antimicrobials) patterns while one (1%) isolate was resistant to only one antimicrobial. The most prevalent MDR profile (n=39; 24%) was to amoxicillin/clavulanic acid, ampicillin, cefoxitin, ceftiofur, and cephalothin. Pulse-field gel electrophoresis results to date indicate that approximately 33% of the isolates have unique pulseotypes.