Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

<jats:title>SUMMARY</jats:title><jats:p>We investigated the prevalence, diversity, and antimicrobial resistance (AMR) profiles of non-typhoidal <jats:italic>Salmonella</jats:italic> (NTS) and associated risk factors on 341 pig, chicken, and duck farms in Dong Thap province (Mekong Delta, Vietnam). Sampling was stratified by species, district (four categories), and farm size (three categories). Pooled faeces, collected using boot swabs, were tested using ISO 6575: 2002 (Annex D). Isolates were serogrouped; group B isolates were tested by polymerase chain reaction to detect <jats:italic>S.</jats:italic> Typhimurium and (monophasic) serovar 4,[5],12:i:- variants. The farm-level adjusted NTS prevalence was 64·7%, 94·3% and 91·3% for chicken, duck and pig farms, respectively. Factors independently associated with NTS were duck farms [odds ratio (OR) 21·2], farm with &gt;50 pigs (OR 11·9), pig farm with 5–50 pigs (OR 4·88) (<jats:italic>vs</jats:italic>. chickens), and frequent rodent sightings (OR 2·3). Both <jats:italic>S</jats:italic>. Typhimurium and monophasic <jats:italic>S.</jats:italic> Typhimurium were more common in duck farms. Isolates had a high prevalence of resistance (77·6%) against tetracycline, moderate resistance (20–30%) against chloramphenicol, sulfamethoxazole-trimethoprim, ampicillin and nalidixic acid, and low resistance (&lt;5%) against ciprofloxacin and third-generation cephalosporins. Multidrug resistance (resistance against ⩾3 classes of antimicrobial) was independently associated with monophasic <jats:italic>S.</jats:italic> Typhimurium and other group B isolates (excluding <jats:italic>S</jats:italic>. Typhimurium) and pig farms. The unusually high prevalence of NTS on Mekong Delta farms poses formidable challenges for control.</jats:p>

Original publication

DOI

10.1017/s0950268815000102

Type

Journal article

Journal

Epidemiology and Infection

Publisher

Cambridge University Press (CUP)

Publication Date

10/2015

Volume

143

Pages

3074 - 3086