Reference | Quintana.Hayashi_2012_AppandEnvMic (10322)

10.1128/AEM.07723-11

Longitudinal study of the persistence of antimicrobial-resistant Campylobacter strains in distinct swine production systems on farms, at slaughter, and in the environment.

Quintana-Hayashi, Macarena P. and Thakur, Siddhartha (United States of America)

Applied and Environmental Microbiology (2012)

Reference

A total of 10 cohorts of conventionally raised pigs and 8 cohorts of ABF pigs (35 pigs/cohort) were sampled five times each on 30 conventional and 8 ABF farms. Healthy pigs were purposely selected in the present study to ensure sampling at slaughter. Pigs reared under the conventional farms were housed indoors under an all-in all-out (AIAO) system and received antimicrobials for therapeutic and prophylaxis purposes. Under the ABF production system, pigs were housed outdoors in the open under a continuous flow and completed all of their production stages on the same site. ABF systems did not use antimicrobials for any purpose.

At slaughter, mesenteric lymph nodes (MLN) and postevisceration and postchill swabs from ABF (n=565) and conventionally raised (n=798) pigs were collected. Samples from ABF and conventionally raised pigs were collected from the farms at five time points, including once at the farrowing stage (sows and 7- to 10-day-old piglets), twice at the nursery stage (4 and 7 weeks old), and twice again at the finishing stage (16 and 26 weeks of age). The final finishing sampling at 26 weeks of age was done 48 h before the pigs were transported to the processing facility.

AST Method: Broth Microdilution

Reference explicitly reports AST breakpoints: False

Reference reports using a MIC table: False

Is Excluded: False

Country Sub-Region Sub-Region Detail
United States of America None North Carolina
ID Note Resolution

Factors

Title Host Host Production Stage Description ROs
Production Type Swine Other Farm Predominantly C. coli (98.3%). 1
Enrofloxacin use Swine Piglets Farm 50 mg, injected. Predominantly C. coli (98.3%). 2
Chlortetracycline Use Swine Grower-finisher Farm Chlortetracycline Use (Finishing, C. coli) [400 g/ton]. 1
Oxytetracycline use Swine Piglets Farm 400g/ton, in feed. Predominantly C. coli (98.3%). 1
Tiamulin Use Swine Grower-finisher Farm Tiamulin Use (Finishers, C. coli) [35 g/ton]. 2
Production Type Swine Other Farm Predominantly C. coli (99.8%), sampled at farrowing, nursery, and finishing. 9
Tiamulin use Swine Piglets Farm 35 g/ton, in feed. Predominantly C. coli (98.3%). 2
Lincomycin use Swine Piglets Farm 32 mg, in water. Predominantly C. coli (98.3%). 1
Production Type Swine Carcass Farm Predominantly C. coli (98.3%). 8
Enrofloxacin use Swine Sows Farm 50 mg, injected. Predominantly C. coli (98.3%). 2