ISSN: 0973-7510

E-ISSN: 2581-690X

Khushbu Singhal, Harshada Joshi and B.L. Chaudhary
Department of Biotechnology, Vigyan Bhawan Block B: New Campus, Mohanlal Sukhadia University, Udaipur, India.
J Pure Appl Microbiol. 2008;2(2):501-505
© The Author(s). 2008
Received: 17/04/2008 | Accepted: 24/07/2008 | Published: 31/10/2008
Abstract

A total of 140 strains of lactobacilli were isolated on MRS agar medium supplemented with 0.2% of sodium taurocholate and 0.2% of sodium thioglcocholate from 10 samples comprising of 4 samples of cow milk, 4 samples of curd, and 2 samples of camel milk. Among 140 strains 36 were isolated from cow milk, 12 from camel milk and 92 strains were isolated from curd samples. The isolated strains were identified on the basis of their cultural, morphology, and biochemical characteristics. Among the 140 isolates, only 68 isolates showed positive characteristics of genus Lactobacillus. A total of 82 of them showed precipitation of deoxycholic acid which was diffused in the surrounding medium.  All of them showed gram- positive reaction, growth at 15 0C temperature, white colonies on MRS agar medium and produced yellowish colonies on BCP agar medium. All the 68 isolates showed negative test for catalase, no growth at 45 0C temperature and no gas production from glucose. Among the 68 isolates 35 isolates reduced litmus milk fast whereas 33 isolates were quite slow in this reaction.

Keywords

Lactobacillus, isolates, biochemical reactions

Article Metrics

Article View: 581

Share This Article

© The Author(s) 2008. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.