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Prevalence of listeria monocytogenes in various food from andhra pradesh india

Authors:SIVA MALLIKA DONEPUDI*, KASTURI KONDAPALLI
Int J Biol Med Res. 2017; 8(4): 6146-6149  |  PDF File

Abstract

Present study aim to know the prevalence of Listeria monocytogenes from various food sources divided into three categories i.e. Dairy products, street food and refrigerated ready to eat food. Total of 1008 sample was analyzed. The organism isolation was done by USDA method and further screened by biochemical assays such as gram straining, catalase activity, motility, hemolysis and CAMP test. Finally conformation of Listeria sps was done by prs gene and L. monocytogenes was confirmed by 5 virulence genes likely, hly A, iap, act A, prf A, plc A. from the study 321 Listeria isolates was identified among this 128 were pathogenic L. monocytogenes.