Multidrug resistant Salmonella enterica isolated from conventional pig farms using antimicrobial agents in preventative medicine programmes
Autor/a
Cameron-Veas, Karla
Lorenzo, Fraile
Garrido, Victoria
Grilló, María Jesús
Migura-Garcia, Lourdes
Fecha de publicación
2018-02-07ISSN
1090-0233
Resumen
A longitudinal study was conducted to investigate the presence of multidrug antimicrobial resistance (multi-AR) in Salmonella enterica in pigs reared under conventional preventative medicine programmes in Spain and the possible association of multi-AR with ceftiofur or tulathromycin treatment during the pre-weaning period. Groups of 7-day-old piglets were treated by intramuscular injection with ceftiofur on four farms (n = 40 piglets per farm) and with tulathromycin on another four farms (n = 40 piglets per farm). A control group of untreated piglets (n = 30 per farm) was present on each farm. Faecal swabs were collected for S. enterica culture prior to treatment, at 2, 7 and 180 days post-treatment, and at slaughter. Minimal inhibitory concentrations of 14 antimicrobial agents, pulsed-field gel electrophoresis and detection of resistance genes representing five families of antimicrobial agents were performed. Plasmids carrying cephalosporin resistant (CR) genes were characterised. Sixty-six S. enterica isolates were recovered from five of eight farms. Forty-seven isolates were multi-AR and four contained blaCTX-M genes harboured in conjugative plasmids of the IncI1 family; three of these isolates were recovered before treatment with ceftiofur. The most frequent AR genes detected were tet(A) (51/66, 77%), sul1 (17/66, 26%); tet(B) (15/66, 23%) and qnrB (10/66, 15%). A direct relation between the use of ceftiofur in these conditions and the occurrence of CR S. enterica was not established. However, multi-AR was common, especially for ampicillin, streptomycin, sulphonamides and tetracycline. These antibiotics are used frequently in veterinary medicine in Spain and, therefore, should be used sparingly to minimise the spread of multi-AR.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
English
Páginas
7
Publicado por
Elsevier
Publicado en
Veterinary Journal
Citación
Cameron-Veas, Karla, Lorenzo Fraile, Sebastian Napp, Victoria Garrido, María Jesús Grilló, and Lourdes Migura-Garcia. 2018. "Multidrug Resistant Salmonella Enterica Isolated From Conventional Pig Farms Using Antimicrobial Agents In Preventative Medicine Programmes". The Veterinary Journal 234: 36-42. Elsevier BV. doi:10.1016/j.tvjl.2018.02.002.
Program
Sanitat Animal
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