Abstract
Simulium asakoae Takaoka and Davies has been confirmed to bite humans and has been incriminated as a vector of blood protozoan parasites of the genera Leucocytozoon and Trypanosoma, as well as an unknown filarial parasite in Thailand. However, its attraction to humans has remained uninvestigated in Malaysia. Recently, 27 black flies were collected in Pahang, Malaysia, of which 25 were captured in CO2-baited Malaise traps and two were collected from humans during trapping activity. All specimens were morphologically identified as S. asakoae. Cytochrome c oxidase I sequences of the two specimens caught on humans showed 100% similarity with those of S. asakoae in the NCBI GenBank, confirming their morphological identity. Blood-meal analysis using a HAL·HARTM kit did not show the presence of domestic or wild animal DNA. However, human DNA was amplified from one engorged fly in the cytochrome b gene amplification assay, providing the first evidence of blood-feeding by S. asakoae in Malaysia.
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