›› 2008, Vol. 26 ›› Issue (4): 9-285.

• 论著 • Previous Articles     Next Articles

Investigation on Malaria Transmission Vectors in Motuo County,Tibet Autonomous Region

PAN Jia-yun1,WU Song1,3,WANG Xue-zhong2,JIANG Wei-kang1,ZHUOMA Yang-jin4,HU Yong-hong4,ZHOU Shui-sen1, CIREN-Quzheng5,SANGDAN-Lamu6,TANG Lin-hua1*
   

  1. 1 National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention,WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis,Shanghai 200025,China;2 Yunnan Institute of Parasitic Diseases,Puer 665000,China;3 School of Integrated Traditional and Western Medicine,Anhui College of Chinese Traditional Medicine,Hefei 230038,China;4 Linzhi Prefectural Center for Disease Control and Prevention,Linzhi 860100,China;5 Motuo County Health Bureau,Motuo 860700,China;6 Motuo County Center for Disease Control and Prevention,Motuo 860700,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-08-30 Published:2008-08-30

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Abstract: Objective To investigate the malaria transmission vectors in Motuo County of Linzhi Prefecture，Tibet. Methods Three natural villages with higher malaria incidence rate in Motuo County were selected for the study in July and August，2007. The anopheline mosquitoes were collected by overnight/semi-overnight trapping indoor and outdoor with human and cattle baits，overnight trapping with ovitrap lights in human dwellings and cowsheds，and by searching in human dwellings in the early morning. The mosquitoes collected were identified morphologically，and the group proportion，density，man-biting rate，blood preference，habits and multiparous ratios were observed. Mosquito larvae breeding place was surveyed，and species of the larvae were identified. Results A total of 5 345 anopheline mosquitoes were captured with 94.71%（5 062/5 345）of An. pseudowillmori，2.39%（128/5 345）of An.willmori and 2.90%（155/5 345）of An. peditaeniatus. The average density of An. pseudowillmori observed through semi-overnight trapping was 17/per person indoor and 105/per person outdoor. The average man-biting rate of An. pseudowillmori through overnight trapping was 15.80/per person（79/5）indoor and 326.22/per person（1 468/4.5）outdoor. The ratio of blood preference to human and cattle through overnight trapping outdoor were 30.51%（714/2 340）and 69.49%（1626/2 340）and 32.02%（57/178）and 67.98%（121/178） through overnight trapping with ovitrap lights respectively. It suggested that An. pseudowillmori feeding both of the human and cattle blood but preferred to cattle blood. Totally 7 An. pseudowillmori mosquitoes were found in the human dwellings in the early morning，and none of them has digested the engorged blood. The Anopheles larvae were only found in the rice field where 106 larvae were collected，including 62 An. pseudowillmori larvae，An. willmori larvae，and 44 An. peditaeniatus larvae. Conclusion An. pseudowillmori seems qualified as the vector biological perspectives for the local malaria transmission.

Key words: Tibet Autonomous Region, Motuo County, Malaria, Vector investigation, Anopheles maculatus group, An. pseudowillori, An. willmori