The present study aimed to phenotypically characterize S. aureus isolates originated from bovine raw milk and different steps of the pig slaughterhouse flowchart to evaluate the biofilm formation ability of these bacterial isolates, the factors that may influence this ability, the behavior of these bacterial pathogens in the food environment, and the sensitivity of these microorganisms to methicillin. In this survey, 28 S. aureus isolates were analyzed, seven of which originated from bovine raw milk, and 21 from swine samples. Biofilm production ability was observed in 57.1% (16/28) of the isolates tested corresponding to 85.7% (6/7) of bovine milk samples and 47.6% (10/21) of pig samples. Most of the isolates previously classified as strong biofilm formers maintained this ability after being exposed to different types of sublethal stress. Regarding the sensitivity of the isolates to methicillin, 42.9% (12/28) were resistant.

中文翻译：

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从动物源及其他相关来源的食物中分离出的金黄色葡萄球菌的表型特征

本研究旨在表型表征源自牛生乳的金黄色葡萄球菌分离株和猪屠宰场流程图的不同步骤，以评估这些细菌分离株的生物膜形成能力，可能影响该能力的因素，这些细菌病原体的行为。食物环境，以及这些微生物对甲氧西林的敏感性。在这项调查中，金黄色葡萄球菌28对分离物进行了分析，其中7种源自牛生乳，21种来自猪样品。在57.1％（16/28）的分离株中观察到生物膜的生产能力，对应于85.7％（6/7）的牛乳样品和47.6％（10/21）的猪样品。以前被归类为强生物膜形成剂的大多数分离株在暴露于不同类型的亚致死压力后仍保持这种能力。关于分离物对甲氧西林的敏感性，有42.9％（12/28）具有耐药性。