Revista Panamericana de Salud Pública
Print version ISSN 1020-4989
MEDEIROS, Marcelo Augusto Nunes; OLIVEIRA, Diana Carmem Nunes de; RODRIGUES, Dália dos Prazeres and FREITAS, Daniel Roberto Coradi de. Prevalence and antimicrobial resistance of Salmonella in chicken carcasses at retail in 15 Brazilian cities. Rev Panam Salud Publica [online]. 2011, vol.30, n.6, pp. 555-560. ISSN 1020-4989. http://dx.doi.org/10.1590/S1020-49892011001200010.
OBJECTIVE: To describe the prevalence and antimicrobial resistance of Salmonella spp. in frozen chicken carcasses at retail from 15 Brazilian cities. METHODS: A descriptive study of data from the Brazilian National Program for Monitoring the Prevalence of Bacterial Resistance in Chicken (PREBAF) was conducted from September 2004 to July 2006. The program collected chicken carcasses in 15 state capitals of Brazil in the five geographic regions of the country. Standardized methodologies were used to isolate Salmonellaspp. and identify serotypes. The minimal inhibitory concentration method was used to test resistance to 18 antimicrobials. RESULTS: In 2 679 carcasses examined, the prevalence of Salmonella spp. was 2.7% (range 0.0%-8.9%). São Paulo State produced 50.6% of positive samples. Eighteen serotypes were identified. The most frequently occurring were Salmonella Enteritidis (48.8%), Salmonella Infantis (7.6%), Salmonella Typhimurium (7.2%), and Salmonella Heidelberg (6.4%). All 250 strains tested were resistant to one or more antibiotics, and 133 (53.2%) were multidrug resistant (≥ 3 classes). S. Heidelberg was resistant to ceftriaxone (75.0%) and to ceftiofur(43.8%). CONCLUSIONS: The prevalence of Salmonella spp. found in this study was relatively low. However, there were a high proportion of multidrug-resistant strains, including third-generation cephalosporins used to treat invasive salmonellosis. The results confirm the relevanceof the PREBAF program. It is recommended that PREBAF be improved, including a timely data analysis. A review of permitted limits for Salmonella spp. in retail chicken in Brazil is also needed.
Keywords : Salmonella; drug resistance, microbial; chickens; food microbiology; health surveillance; Brazil.