Antimicrobial resistance profile of Salmonella spp. isolates in laying-hens from Bastos-SP region

Author(s)

Valdinete Pereira Benevides

• Document type: Master's Dissertation
• Press: Jaboticabal. 2019-08-27.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal
• Defense date: 2019-07-30
• Advisor: Marcela da Silva Rubio; Angelo Berchieri Junior; marcela da silva ubio

Abstract

Avian paratyphoid infections are caused by several serovars of Salmonella spp. which can affect a wide range of hosts, like humans and animals. In order to implement a control program against this pathogen, it is indispensable to take notice of which serovar is facing up. Thus, this study was done to investigate the presence of Salmonella spp. and to identify the antimicrobial resistance profiles of the isolates in the Midwest of São Paulo state, which is known as the main region of Brazilian table egg production. For this, 2008 feces samples were collected from 151 commercial laying hen farms and were submitted to microbiological analysis. Twenty-two Salmonella serovars were identified in 80 (52.9 %) farms and the most prevalent were S. Mbandaka (37.2 %) and S. Braenderup (12.8 %). All strains were resistant to at least one of the 23 antimicrobials tested, being the highest levels of resistance against to streptomycin (93.5 %) and sulfonamide (84.6 %). Multiresistance was observed in 41 % of the isolates and the maximum resistance profile observed was to 10 drugs. Thus, the identification of Salmonella spp. in avian production provides epidemiological knowledge to develop prevention and control measurements of the pathogen in order to guarantee poultry health and to prevent human foodborne salmonellosis. Keywords: Antimicrobial susceptibility, avian salmonellosis, food-borne desease, multiresistance, public health. (AU)

• FAPESP's process: 17/25743-7 - Antimicrobial resistance profile of Salmonella spp. isolates in laying-hens from Bastos-SP region
• Grantee: Valdinete Pereira Benevides
• Support Opportunities: Scholarships in Brazil - Master