关键词: 蜚蠊, 带菌, 检出率, 传播疾病

Abstract: Objective To investigate the ecto-enteric bacteria and endo-enteric bacteria carried by Blattella germanica and Periplaneta americana at different sites in Beijing,to provide the evidence for understanding the diseases transmitting possibility.Methods In this study,cockroaches were trapped by jars in the field,pathogens were isolated in laboratory.Then routine methods,i.e.bacteria culturing,biochemical reaction,slide agglutination and ELISA,were used to identify them.Results 16 groups of B.germanica were trapped from different sites(hospital,restaurant,school,resident room,food manufactory,office and cockroach rearing laboratory).9 species of enteric pathogens and opportunistic pathogens were isolated from the surface of 93.8%(15 of 16) of the groups;11 species were isolated in the body of 100%(16 of 16) of the groups.The main pathogens included: Escherichia coli,Salmonella sp,Shigella,Proteus,Citrobacter,Hafnia alvei,E.cloacae,Serrati marcescens etc.Of the 16 groups,was positive with HBsAg.From the specimens of P.americana,7 species were isolated from the insects surface and 9 species were isolated in the body.The main pathogens consisted of E.coli,Citrobacter,E.aerogenes,Proteus,E.cloacae,H.alvei,Shigella,Salmonella sp,S.marcescens,Klebsiella pneumoniae,and negative positive with HBsAg/ The results showed that the cockroaches in hospitals carried more pathogens species,than that in restaurants and food manufactories.This situation might be mainly related to the temperature and humidity of the habitats,as well as the food abundance,the tangled crowd.Conclusion Cockroaches can carry pathogens,and high risks exist to human health in cockroaches abundance place especially in hospitals.