title: Tannic acid resistance in ruminal streptococcal isolates.
abstract: Tannin degrading isolates of Streptococcus spp. from rumen of non-adaptive cattle, when grown in BHI broth, were able to tolerate tannic acid upto a level of 50 g/l. An increase in lag period from 1.5 to 6 h was observed for the isolates in presence of increased concentration of tannic acid. In addition, the morphology of gram positive diplococci converted to an elongated chain of 40-50 cells with increasing tannic acid from 1 to 4%. Qualitatively, the tannase activity was found to be present in the isolates tested, indicating their potential of being a tannin degrader.
authors.affiliation: Dairy Microbiology Division, National Dairy Research Institute, Karnal-132 001, India.
authors.forename: Gunjan
authors.initials: G
authors.lastname: Goel
authors.forename: Anil Kumar
authors.initials: AK
authors.lastname: Puniya
authors.forename: Kishan
authors.initials: K
authors.lastname: Singh
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002265:Carboxylic Ester Hydrolases / Q000032:analysis; D002417:Cattle; D024881:Drug Resistance, Bacterial; D012417:Rumen / Q000382:microbiology*; D013291:Streptococcus / Q000166:cytology / Q000187:drug effects* / Q000254:growth & development / Q000302:isolation & purification; D013634:Tannins / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D013634:Tannins; D002265:Carboxylic Ester Hydrolases; C022711:tannase