Samples (10gm) were enriched in 90 ml of APW at 37 C for 24 hours.The enriched cultures were streaked on selective media i.e thiosilphate Citrate Bilesalt Sucrose agar and plates were incubated at 37 C for 24 hours. The green colour colonies with blue centres were taken for further confirmation by biochemical tests like indole, methyl red, VP, TSI,urease and nitrate tests.