Giannuzzi L, Parada J L
Centro de Investigación y Desarrollo en Criotecnología de Alimentos, CIDCA, La Plata, Argentina.
Rev Argent Microbiol. 1991 Apr-Jun;23(2):79-85.
The purpose of this study was to determine whether S. aureus could grow in solid substrates with aw 0.843 adjusted by water adsorption. The media used included dehydrated powder of pork, beef and milk as basic substrates in order to compensate an eventual deficiency; additional source of nutrients was added. The tested strains were ATCC 6538 P, FDA-C243, NA1 and FM1. It was observed that no strain grew at 30 degrees C in those media at aw 0.843. These data were compared with others which indicate that S. aureus could grow al aw 0.83-0.84. The possible reasons for the difference in the minimal aw value reported to be required for the growth of S. aureus are discussed.
本研究的目的是确定金黄色葡萄球菌能否在通过水吸附调节至水分活度（aw）为0.843的固体基质中生长。所使用的培养基包括猪肉、牛肉和牛奶的脱水粉末作为基本基质，以弥补可能出现的营养缺乏；还添加了额外的营养源。测试菌株为ATCC 6538 P、FDA - C243、NA1和FM1。观察到在30摄氏度下，这些菌株在水分活度为0.843的那些培养基中均未生长。这些数据与其他表明金黄色葡萄球菌能在水分活度为0.83 - 0.84时生长的数据进行了比较。讨论了报道的金黄色葡萄球菌生长所需最低水分活度值存在差异的可能原因。
