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Indian Journal of Occupational and Environmental Medicine
Medknow Publications
ISSN: 0973-2284
EISSN: 0973-2284
Vol. 9, No. 1, 2005, pp. 29-34
Bioline Code: oe05008
Full paper language: English
Document type: Research Article
Document available free of charge

Indian Journal of Occupational and Environmental Medicine, Vol. 9, No. 1, 2005, pp. 29-34

 en TNT biotransformation potential of the clinical isolate of Salmonella typhimurium - potential ecological implications
Litake Geetanjali M., Joshi Suresh G., Ghole Vikram S.

Abstract

Out of fifty-six isolates screened three bacterial strains enriched with TNT either as sole source of nitrogen (for Salmonella typhimurium   check for this species in other resources , Klebsiella pneumoniae   check for this species in other resources ) or along with co-substrate (for Acinetobacter baumannii   check for this species in other resources ), have been carried out nitro group reduction under aerobic conditions. During studies, S. typhimurium found to have high potential (100% of 50 mg l-l) in removal of TNT, than K. pneumoniae (70% of 20 mg l-l) and A. baumannii (52% of 40 mg l-l, in presence of co-substrate). Therefore studies were focused on S. typhimurium, which had shown good growth, and protein contents, with disappearance of TNT, and concomitantly release of nitrite over the period of time. Removal of TNT was analyzed by HPLC, and nitrite liberation was consistently found coincided with TNT disappearance from the medium. As compared to earlier reports, 100% disappearance of TNT within 30 h by S. typhimurium is encouraging, and may indicate its potential in bioremediation of TNT. This is the first report on S. typhimurium, Klebsiella pneumoniae and Acinetobacter baumannii for transformation of TNT with nitrite release into the medium.

Keywords
Acinetobacter baumannii, Bioremediation, Klebsiella pneumoniae, Salmonella typhimurium, TNT

 
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