关键词: 蚊虫, 有瓣蝇类, 密度, 监测

Abstract:

Objective　To evaluate the impact Wenchuan earthquake exerted on vectors and vector-borne diseases and identify the species, density dynamics and ecologic patterns, providing scientific basis for the risk assessments of vector-borne diseases. Methods　The density of vectors was monitored using such approaches as cage traps, light traps, visual observation and mist net capture, the species of mosquitoes and flies investigated. Results　Low density of mosquitoes, flies, mice and fleas in the earthquake-stricken areas was identified, clearly below the reference indexes. However, high positive rates of larvae in stool were found. More than 800 mosquitoes and flies were captured, flies belonging to 42 species, 28 genera and 4 families and mosquitoes belonging to 5 species, 3 genera and 1 family. Helicophagella melanura, Mascina stabulans, Musca domestica, Culex tritaeniorhynchus and Cx. pipiens quinquefasciatus were dominant species there. Conclusion　Aggregate analysis revealed that vector control was effective and played a key role in preventing the occurrence of major epidemics after the earthquake. However, redundant and inadequate vector control was still noticed. Therefore, it is necessary to establish a long-term effective mechanism in conjunction with comprehensive responding teams for prompt emergency response.

Key words: Mosquito, Calyptratae flies, Density, Surveillance