Abstract
Multidrug resistance is a global public health problem. In 2017, in Mexico, Salmonella caused 192,771 foodborne zoonosis cases. Sonora, Hidalgo, Mexico State and Jalisco have reports of multi-resistant Salmonella strains in chicken and beef carcasses in slaughterhouses; however, the prevalence in livestock herds is unknown. From January 2012 to October 2013, 144 diarrheal stool samples were collected from bovine hatchlings from the Altos Sur region of the Jalisco State. As a result, the presence and serotype of Salmonella was determined, as well as the antibiotic resistance profile, and the genetic relationship, using PFGE. The Salmonella prevalence was 4.16 % (6/144) in feces, identifying the serotypes Anatum, Pullorum, Poona, Typhi, Gallinarum and Salmonella enterica subsp. arizonae. All the strains showed resistance to ampicillin, cephalothin, trimethoprim-sulfamethoxazole, and some of them, additionally, to amikacin, cefotaxime and/or ceftriaxone. In addition, the persistence and potential spread of two Salmonella Anatum strains was discovered in one herd. This is the first study conducted in neonate bovine in the Jalisco State, Mexico, to detect multidrug resistant Salmonella. Continuous monitoring of multi-drug resistance in animal biota for human food and ongoing training of veterinary doctors are key elements for efficient prophylaxis and antimicrobial pharmacotherapy.
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