High grade MacConkey Broth w/ Neutral Red is supplied by Micromaster. It is available in the form of a pale yellow to pink homogeneous free flowing powder with a pH in the range of 7.3 to 7.7. For maximum efficiency, it must be stored below 30C in tightly closed container.

Quantity provided: 500g /pack

MacConkey Broth w/ Neutral Red is used for direct inoculation of water samples for coliform counts and microbiological examination of foodstuffs. This medium is also accepted by the Standard Methods for the Examination of Milk and Dairy Products and pharmaceutical preparations. MacConkey Broth w/ Neutral Red is recommended by BIS under the specification IS:5887 (Part I) 1976 for Detection of Bacteria responsible for food poisoning Part I: for Isolation, Identification and Enumeration of Escherichia coli. This culture media is considered as a standard medium for the primary isolation as well as presumptive identification of coliaerogenes group in food and water which contains neutral red as an indicator. Bile salt inhibits most gram-positive bacteria. Gram-negative bacteria usually grow well on the medium and are differentiated by their ability to ferment lactose. Lactose fermenting strains grow as red. The red colour is due to production of acid from lactose, absorption of neutral red and a subsequent colour change of the dye when the pH of medium falls below 6.8. Lactose non-fermenting strains, such as Shigella and Salmonella are colourless and typically do not alter appearance of the medium.