Species composition of sandfly in Leishmaniasis affected foci in Chiang Rai Province Northern Thailand

  • ทวีศักดิ์ ศรีวงค์พันธ์ Vector Borne Disease Control Center 1.3 Chiang Rai
  • กุณากร ชัยพูน Vector Borne Disease Control Center 1.3 Chiang Rai
  • สุรเกียรติ พรชัยกิตติกุล Vector Borne Disease Control Center 1.3 Chiang Rai
  • ไพรวรรณ์ เพี่ยงพิศ Vector Borne Disease Control Center 1.3 Chiang Rai
  • วรรณภา สุวรรณเกิด Office of Disease Prevention and Control Region 1, Chiang Mai
Keywords: Leishmaniasis, Phlebotomus, Sergentomyia

Abstract

This study aims to investigate the sandflies species composition. A cross-sectional survey was conducted, in three purposive selected villages where Leishmaniasis cases were previously reported in Village 4 Pa-ao-Donchai Canton, Munag District and Vil. 14 Por Canton, WeingKhan District including adjacent location where no Leishmaniasis has been reported, Vil. 11, TarnThong Canton, Phan Distrit, Chiang Rai Province. The study was carried out from August-November 2015. Sampling was conducted during three consecutive nights, using light traps, the collection time beginning after sunset 18.00 pm. - 06.00 am. The results revealed that, total of 430 sandflies were collected with 17 species of 2 genera: Sergentomyia (365/84.9%) and Phlebotomus (65/15.1%) respectively. Females were slightly collected higher than male (218:212). The sandflies were collected highest in November (300/69.8%), October (58/13.5%), August (46/10.7%) and September (26/6%) respectively. The first three most abundant species of sandflies captured were Sergentomyia punjabensis (31.2%), follow by Sergentomyia gemmea (27.2%) and Sergentomyia barraudi (8.8%) respectively. In addition, two species of the genus Phlebotomus, Phlebotomus argentipes and P. major major a known vector of Leishmaniasis were also detected. None of the captured sandflies was infected with Leishmania spp. by PCR technique. Collection sites with most collected of sand¬flies were clump of bamboos (120/430) 27.9% follow by abandoned house (80/430) 18.6% and termite hill (68/430) 15.8%. The determination of the species composition of sandfly populations, seasonal vari¬ations, relative abundances and estimations of infection in the vector population may provide information about the dynamics of leishmaniasis transmission that is useful in planning vector control activities.

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Published
2017-04-28
Section
Original Article