عنوان مقاله [English]
نویسندگان [English]چکیده [English]
German Cockroaches (Blattela germanica) are insects that often live in dirty environment such as sewagesand toilets and feed from contaminatedmaterials.This insect is one of the most important factors to transport and spread bacteria in human environment, particularlybacteria of Enterobacteriaceae family. In this study, German cockroachand#39;s midgetandrsquo;s bacterial flora in Tehran was identified. German cockroaches from various regions of Tehran were round up and their gut were extracted and cultured on microbial media. Grown samples identified with differentculture media.Ten bacterial genera were identified in cockroachand#39;s midgut. Nine genera were belonging to gram negative bacteria and one isolates belong to gram positive bacteria. These genera belong to Citrobacter (20%), Psedomonas (18%), Proteus (17%), E. coli (15.5%), Enterobacter (12%), Staphilococcus (11.1%), Salmonella (3.3%), Klebsiella (1.1%), Shigella and Hafnia (1%). Several pathogenicbacteria are growing within the body of German cockroach and transmittedto the human environment with these insects. Most of these bacteria are pathogenic and can effect on human health. In this study, the most of identified bacteria were belong to Enterobacteriaceae family, and could be pathogen and effective on human hygiene.