Antimicrobial susceptibility and presence of resistance & enterotoxins/enterotoxin-likes genes in Staphylococcus aureus from food

The aim of this study was to investigate the antibiotic resistance profiles and staphylococcal enterotoxins/enterotoxin-likes genes (se/sel) of Staphylococcus aureus from food. About 93 S. aureus strains were screened and 43 strains harbored se/sel genes, which were from raw meat, pickles, cooked meat, egg products, bean products, aquatic products, grains and fresh vegetables, respectively. Among the 21 se/sel genes, selx gene was found in 30/93 (32.26%) strains, followed by seb, ser, sea, sec, selp, sell and set. About 50/93 strains carried 10 antibiotic resistance genes. The prevalence rate of norA, chlA and grlA genes was relatively high, followed by ermC, tetA, aac6'/aph2, ermB, tetM, msrA and blaZ. Sixty-two strains of the 93 S. aureus isolates (62/93, 66.67%) were multidrug-resistant (3 antimicrobial agents). RESUMENEl presente estudio se oriento a investigar los perfiles de resistencia a los antibioticos y los genes de enterotoxinas estafilococicas y de aquellos parecidos a enterotoxinas (se/sel) de S. aureus aislada de alimentos. Con este objetivo se cribaron 93 cepas de S. aureus, 43 de las cuales albergaban genes se/sel, procedentes de carne cruda, pepinillos, carne cocida, productos de huevo, productos de frijol, productos acuaticos, granos y verduras frescas. En 30 de las 93 cepas (32,26%) se encontro el gen selx entre los 21 genes se/sel y, en orden descendente, los genes seb, ser, sea, sec, selp, sell y set. Asimismo, se constato que 50 de las 93 cepas albergaban 10 genes de resistencia a los antibioticos. La tasa de prevalencia de los genes norA, chlA y grlA fue relativamente elevada siguiendole, en orden descendente, las de los genes ermC, tetA, aac6'/aph2, ermB, tetM, msrA y blaZ. De las 93 cepas de S. aureus aisladas (62/93, 66,67%) 62 son resistentes a diversos medicamentos (tres agentes antimicrobianos).