哥伦比亚琼脂基础 英文名称: Columbia agar base | ||||||
型号:null 产品货号: CM0331B | ||||||
价格:请致电:010-57128832,18610462672 | ||||||
品牌: oxoid | ||||||
货号 名称 中文 英文 规格 产地
【产品参数】 Typical Formula* gm/litre Special peptone 23.0 Starch 1.0 Sodium chloride 5.0 Agar 10.0 pH 7.3 ± 0.2 @ 25°C 【Directions】 Add 39g to 1 litre of distilled water. Boil to dissolve the medium completely. Sterilise by autoclaving at 121°C for 15 minutes. Cool to 50°C and add 5% sterile defibrinated blood. Storage conditions and Shelf life Store the dehydrated medium at 10-30°C and use before the expiry date on the label. Store the prepared plates of medium at 2-8°C. 【Technique】 Inoculate the culture suspected to be Clostridium perfringens in a straight line across a plate of Columbia sheep blood agar. Streak an overnight (or older) culture of Streptococcus agalactiae known to produce the CAMP factor at right angles to the first inoculation taking care that the lines do not touch. Incubate anaerobically at 35-37°C for 18-24 hours. A positive reverse CAMP test is indicated by the formation of an ``arrowhead’’ of haemolysis between the lines of the Clostridium perfringens and Streptococcus agalactiae growth. 【Description】 Traditionally, blood agar bases have been either casein hydrolysate or meat infusion media. The advantage of the first lies in the rapid production of large colonies, and of the second in clearly defined zones of haemolysis and good colonial differentiation. Columbia Agar Base (CM0331) ( Ellner et al.1 ) combines the virtues of both these types of media to give an improved all-round performance. This new base has shown versatility and superior performance in several applications. 哥伦比亚血琼脂基础(Columbia Blood Agar Base)现货供应 |