Resumen

BRICENO-TORRES, Lilibeth et al. Fluoroquinolone Resistance and Other Drugs in Salmonella spp. Strains Isolated from Whole Chicken Processing.. Rev. Cient. (Maracaibo) [online]. 2007, vol.17, n.5, pp.521-528. ISSN 0798-2259.

The aim of this study was to determine the resistance and multi-resistance patterns of strains of Salmonella spp. isolated in a poultry processing plant in Zulia State, to quinolones and fluoroquinolones (Nalidixic acid=Na, ciprofloxacin=Cf, and enrofloxacin=Ex), as well as other antimicrobial drugs: tetracycline (T), oxitetracycline (O), neomycin (N), nitrofurantoine (Nf), trimetropim (Tr) and chloranfenicol (C). A total of 146 Salmonella isolates were obtained from different sources: 34 strains from pools of Intestines (duodenal and colon) and internal organs (liver and spleen); 87 strains of carcass samples collected in four different phases: carcasses after defeathering, evisceration, chilling, and final packed products; 8 strains from edible by-products (neck, liver, gizzard and legs) and 19 strains from environmental samples (water, ice, and equipment surfaces). The detection analyses were performed using conventional microbiological techniques, biochemical tests, serological and agar diffusion methods for antimicrobial susceptibility. The results showed a high resistance to Na (73.3%; 107/146), Nf (60.2%; 88/147), T (56.2%; 82/146), O (54.8%; 80/146), Tr (54.1%; 79/146) and low resistance to Ex (6.2%; 9/146), Cf (2.7%; 4/146), N (2.0%; 3/146) and C (2.7%; 4/146). There was observed a high percentage of multi-resistant strains (65.0%; 95/146) and within of them, the most common patterns were: NaNfTTr (42.1%), NaNfTr (26.3%) and NaNfT (10.5%). No significant relationship was observed (P>0.05) between resistance and multi-resistance patterns with the source of the Salmonella strains. These results are evidence of the emergence of resistant Salmonella strains to fluoroquinolones and the necessity of programs for antimicrobial resistance surveillance.

Palabras clave : Antibiotic resistance; Salmonella spp; poultry slaughterhouse; poultry carcasses.