Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: December 1, 1998
Publication Date: N/A
Technical Abstract: The Food and Feed Safety Research Unit is actively pursuing research on various aspects of enteropathogens in swine. We conducted an epidemiological survey of the prevalence of Salmonella and Campylobacter in swine in an integrated swine operation in Texas. There was a mean prevalence of 61% (range of 11-88%) Salmonella in pigs. Of the salmonellae recovered, 362 pure cultures were sent to the National Veterinary Services Laboratory for serotyping. Twenty-nine different serovars were reported. Antibiotic resistance on these typed samples was determined using the Dispens-O-Disc Susceptibility Test System using 13 different antimicrobial agents that have been utilized in either veterinary medicine, human medicine, or both. Analysis of the 362 Salmonella isolates indicated that 304 of the samples (83.98%) were resistant to penicillin G, 225 samples (62.15%) were resistant to chlortetracycline, 61 samples (16.85%) were resistant to streptomycin, and 49 samples (13.54%) were resistant to sulfisoxazole. We isolated, typed, and enumerated Campylobacter (C. coli, C. jejuni, and C. lari) from pigs of these farms. The overall prevalence was 92%. Of the C. coli and C. jejuni isolates tested, 12% were resistant to 4 antibiotics, 63% were resistant to 3 antibiotics, 12% were resistant to 2 antibiotics, and 12% were resistant to only 1 antibiotic. All isolates (100%) were resistant to lincomycin, 75% were resistant to tetracycline, 50% were resistant to chlortetracycline, and 25% were resistant to ampicillin.