Jordá Graciela B, Marucci Raúl S, Guida Adriana M, Pires Patricia S, Manfredi Eduardo A
Cátedra de Microbiología General, Carrera de Bioquímica, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Mariano Moreno 1375 (3300) Posadas, Misiones, Argentina.
Rev Argent Microbiol. 2012 Apr-Jun;44(2):101-4.
Staphylococcus aureus causes food poisoning due to its ability to produce enterotoxins. Food handlers carrying enterotoxin-producing S. aureus can contaminate food, thus leading to food poisoning. Samples were obtained from 88 food handlers in the Province of Misiones, Argentina. S. aureus was isolated from nasal swaps and PCR amplification was performed for genes encoding staphylococcal enterotoxins. A total of 37.5 % food handlers were positive for S. aureus. Expression of enterotoxin genes was found in 13 of the 33 (39.4 %) S. aureus isolates studied, accounting for 14.7 % of food handlers. Gene sea was detected in 10 isolates followed by gene sec in 3 isolates. All isolates were susceptible to teicoplanin, gentamicin and rifampicin. Four isolates were resistant to methicillin whereas 2 isolates were resistant to clindamycin and erythromycin. These results constitute a critical alert and indicate the need for developing rational measures to reduce the potential risk of food poisoning.
金黄色葡萄球菌因其产生肠毒素的能力而导致食物中毒。携带产肠毒素金黄色葡萄球菌的食品处理人员会污染食物，从而导致食物中毒。从阿根廷米西奥内斯省的88名食品处理人员中采集了样本。从鼻拭子中分离出金黄色葡萄球菌，并对编码葡萄球菌肠毒素的基因进行了PCR扩增。共有37.5%的食品处理人员金黄色葡萄球菌检测呈阳性。在所研究的33株金黄色葡萄球菌分离株中，有13株（39.4%）检测到肠毒素基因表达，占食品处理人员的14.7%。在10株分离株中检测到sea基因，其次在3株分离株中检测到sec基因。所有分离株对替考拉宁、庆大霉素和利福平敏感。4株分离株对甲氧西林耐药，2株分离株对克林霉素和红霉素耐药。这些结果构成了一个重要警示，表明需要制定合理措施以降低食物中毒的潜在风险。
