Occurrence of Some Mosquito Species in Tha-Ma-Nya Village, Hpa-an Township, Kayin State in Myanmar

Abstract

Among the numerous species of blood-sucking insects, mosquitoes stand out as most offensive to man and other warm-blooded animals. Mosquitoes were collected by indoor and outdoor CDC light traps in randomly selected household and larvae were collected in and around 3 Kilo meter radius from the study site. A total of 14 species, five genera under family Culicidae were recorded in Tha-ma-nya village. Recorded species included two species under genus Aedes, three species under genus Culex one species under the genus Armigeres, one species under the genus Toxorhynchities and 7 species under genus Anopheles. Species inentification was done according to different morphological keys. Altogether seven out of 14 recorded mosquito species were medically important vector species. Aedes aegypti and Ae. albopictus were primary and secondary vectors of dengue fever. Culex quinquefasciatus is a microfilariasis vector. The important vectors of Japanese encephalitis are Culex tritaeniorhynchus and Culex gelidus. High density of malaria vector Anopheles dirus was collected in outdoor light trap than An. minimus, although An. minimus was collected high density by indoor CDC light traps. Virus of Japanese encephalitis could transmit from rearing pig and ducks to persons living in the study area. Indoor clear water containers serve as the favorable places for living Aedes spp. Outdoor water storage concrete tanks provided stagnant water to breed Culex and Anopheles species. Water pools, rock pools and rice fields water were found high preferences for breeding of malaria vectors An. dirus and An. minimus larvae and An. dirus larvae was also collected from concrete tanks. Microfilariasis vector Cx. quinquefqsciatus and JE vector Cx. tritaeniorhynchus larvae were collected from polluted water pools and Dengue vector larvae as Aedes larvae were collected from metal drums, bago jars and concrete tanks. Status of the mosquito species composition in the Tha-ma-nya village provided database not only for further researches but also for giving good knowledge and practice in health workers for effective control of vector borne diseases.