For holding clinical specimens during collection, like, Enterobacter aerogenes, Klebsiella pneumoniae,Neisseria meningitidis, Salmonella Typhimurium, Vibrio cholera etc. TRANSPORT MEDIUM CARY-BLAIR W/O CHARCOAL is used for transportation and preservation of bacteriological samples, without significant increase in growth. Cary-Blair Transport Medium is a modification of Stuart’s Medium. It is a chemically defined, non-nutritive, low oxidation/reduction potential medium to maintain the viability of organisms during collection and transportation of the specimen(s), without allowing significant multiplication. Sodium chloride maintains the osmotic balance of the medium. Disodium phosphates act as a buffer system. Agar is a solidifying agent. Sodium thioglycollate and small amount of agar suppress oxidative changes and provide a reduced environment. An alkaline pH of the medium prevents bacterial destruction caused by the acid produced. Sterile swab allows the easy absorption of specimen.