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Abundance and prevalence of Culicoides (Diptera: Ceratopogonidae) on some Philippine chicken farms.

In total, 10,067 biting midges of the genus Culicoides comprising 17 species were collected in a light trap survey of 50 chicken farms in the province of Batangas, southern Luzon, Philippines, between 14 September and 5 December 1988. The species of greatest prevalence and abundance were Culicoides effusus Delfinado, Culicoides peregrinus Kieffer, and Culicoides palpifer Sen & Das Gupta. Engorged females of C. effusus, C. peregrinus, C. palpifer, Culicoides oxystoma Kieffer, Culicoides arakawae (Arakawa), Culicoides guttifer (Meijere), Culicoides albibasis Wirth & Hubert, Culicoides huffi Causey, Culicoides clavipalpis Mukerji, and Culicoides wenzeli Delfinado were collected. The abundance and prevalence of C. effusus, C. peregrinus, and C. C. palpifer in the overall sample of farms as well as in farms with previous occurrence of leucocytozoonosis indicated that these species are potential vectors of Culicoides-borne Leucocytozoon caulleryi Mathis & Leger among chickens in this area. Although blood-engorged females of C. arakawae were collected frequently, the prevalence and abundance of this species were limited.