Encephalitis on Taiwan

II. Mosquito Collection and Bionomic Studies

Stephen M. K. Hu United States Naval Medical Research Unit No. 2, Taipei, Taiwan

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J. Thomas Grayston United States Naval Medical Research Unit No. 2, Taipei, Taiwan

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Summary

Three stations—one in the north, one in the south, and one central—were established on Taiwan to collect mosquitoes for studies of the vector of Japanese encephalitis virus. Both Magoon traps and light traps caught only small numbers of mosquitoes. To obtain large numbers it was necessary to collect individually from cattle tethered outdoors. Most mosquitoes were collected during the first two hours after sunset. Culex tritaeniorhynchus was the predominant mosquito species collected with animal bait in northern Taiwan. Culex fuscocephalus was the predominant species in the south. A variety of other species were caught with different seasonal incidence. The results with various collection methods are presented.

Author Notes

Present address: United States Operation Mission, Nepal.

Present address: Department of Preventive Medicine, University of Washington, Seattle 5, Washington.

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