The survey of flies of medical and veterinary importance in Thailand

Abstract

During 1978 we made surveys of flies in the northern, northeastern and central parts of Thailand. This paper presents fly species as well as their densities at market places, garbage, slaughter houses and animal sheds from those parts. A total of 142,656 flies consisting of 25 species of 13 genera was collected by sweeping nets. They comprised 85.7% of Musca domestica, 9.1% of Chrysomyia megacephala, 1.4% of Phaenicia cuprina, 1.2% of Musca sorbens, 0.6% of M. lucens, 0.6% of biting flies (Stomoxys spp., Haematobia exigua and Tabanus spp.), 0.8% of haematophagous flies (Musca fasciata, M. conducens, M. ventrosa and M. crassirostris), 0.3% of Chrysomyia albiceps, 0.1% of Parasarcophaga spp. and a few other flies of less than 0.1% including Orthellia indica, Ophyra chalcogaster, Lispe orientalis, Fannia scalaris, Cosmina bicolor and Muscina stabulans. There were more females than males, the female to male ratio ranged from 552.6 : 1 to 4.2 : 1. From these surveys Musca lucens, M. fasciata, M. crassirostris, Stomoxys indica and Haematobia exigua were collected only in the north, Stomoxys uruma in the northeast, Musca conducens, Orthellia indica and Tabanus spp. in the northern and central parts, and rest of the 14 species were found to be distributed throughout all the district surveyed.