弧菌显色琼脂500克/瓶

弧菌显色琼脂建议选择性隔离和弧菌物种的分化根据菌落的颜色,由于aÿ-galactosidase和aÿ-glucosidase酶的活动。弧菌属由海洋和河流生态系统微生物的自然栖息地。他们经常从海洋水分离,尤其是在温暖个月当水温高于17ºC。引起霍乱弧菌物种主要是负责),在人类食物中毒。中含有酵母膏和蛋白胨氮的来源,维生素(特别是用于b细菌生长所必需的),矿物质和氨基酸。特殊的胆汁能抑制革兰氏阳性生物体。蔗糖,葡萄糖和乳糖可发酵的碳水化合物,提供碳和能量。氯化钠为运输和渗透提供重要的电解质平衡。柠檬酸钠、硫代硫酸钠和胆盐的钠选择性药物,抑制革兰氏阳性细菌。显色底物添加到检测弧菌物种通过颜色的变化在殖民地。 This medium is designed for the development and diferentation of 3 types of Vibrio depending on the enzyme activity of each strain. ß-glucosidase activity will appear as blue-green colonies, as in the case of V. parahaemoliticus. The activity of ß-galactosidase enzyme will show red or pink colonies in the case of V. cholerae. And finally, the yellowish-white colonies will be V. alginolyticus, which has ß-galactosidase, but is not expressed due to the high concentration of sugars. The alkaline pH of the medium enhances the recovery of V. cholerae. ISO 21872: Microbiology of the food chain - Horizontal method for the detection of potentially enteropathogenic species Vibrio spp. Detection of Vibrio parahaemolyticus, Vibrio cholerae and Vibrio vulnificus (ISO 21872-1: 2017), recommends an alternative selective medium to TCBS for the detection of Vibrio enteropathogenic species.