Isolation,screening and identification of methamidoghos-degrading bacteria from habitats at a pesticide factory

To study methamidoghos-degrading bacteria in different habitats at a pesticide factory,soil samples from sewage,drainage ducts and surroundings at Fu-Nong Biochemistry Co.,Ltd in Fujian were collected for the isolation.Sixty-seven bacterial stains were isolated employing media containing high concentration of methamidoghos followed by identification using the fatty-acid analysis.They were determined to belong to 22 genera.In the 3 different types of habitats,35 microcial stains belonging to 8 genera were found.The numbers of Bacillus and Pseudomonas strains were 21 and 19,respectively.In combination,they amounted to 59.7% of the total.Among them,Bacillus cereus and Pseudomonas putida could grow in soils of all the sampling sites.