title: Wolbachia infections in mosquitoes and their predators inhabiting rice field communities in Thailand and China.
abstract: Wolbachia are inherited, endocytoplasmic bacteria that infect a wide range of arthropods. Here is the first systematic report on the study of Wolbachia infection in mosquitoes and their predators from both Thailand and China. In Thailand, 632 mosquito specimens (20 spp.) and 424 insect predators (23 spp.) were collected from the rice agroecosystem, mostly from the Central region, followed by the Northeast, the North and the South and were inhabiting rice fields, wetlands and ditches. In China, 928 mosquitoes (15 spp.) and 149 insect predators (16 spp.) were collected from rice fields along the Weishan Lake in Shandong province. Specimens were classified in the orders Diptera, Coleoptera, Odonata and Hemiptera. Using wsp, ftsZ, 16S rRNA and groE gene amplifications, Wolbachia were detected in 12 mosquito spp. and 6 predator spp. from Thailand and 11 mosquito spp. and 5 predator spp. from China. The relative Wolbachia densities of these species were determined using quantitative real-time PCR. The mosquito, Aedes albopictus, and the predator, Agriocnemis femina, had the highest bacterial densities. These results imply that Wolbachia of supergroup B are distributed throughout these insects, probably via horizontal transmission in rice agroecosystems.
authors.affiliation: Department of Plant Production Technology, Faculty of Agricultural Technology, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand. Electronic address: itsanun.wi@kmitl.ac.th.
authors.forename: Itsanun
authors.initials: I
authors.lastname: Wiwatanaratanabutr
authors.affiliation: Department of Medical Entomology, Vector Biology Key Laboratory of Medicine and Health Shandong Province, Shandong Institute of Parasitic Diseases, Shandong Academy of Medical Sciences, Jining, Shandong 272033, PR China.
authors.forename: Chongxing
authors.initials: C
authors.lastname: Zhang
mesh_terms: D000383:Agriculture; D000818:Animals; D002681:China; D009033:Culicidae / Q000235:genetics* / Q000382:microbiology*; D004269:DNA, Bacterial / Q000235:genetics*; D063191:Odonata / Q000235:genetics* / Q000382:microbiology*; D012275:Oryza; D013785:Thailand; D020577:Wolbachia / Q000235:genetics* / Q000302:isolation & purification*
chemical_list: D004269:DNA, Bacterial
keywords: Mosquito endosymbionts; Predation; Rice field ecosystem; Wolbachia