Analysis of malaria prevalence in national malaria surveillance sites of Jiangsu Province / 中国血吸虫病防治杂志

ABSTRACT

Objective To understand the current status of malaria prevalence,its impacts and malaria transmission trends in Jiangsu Province.MethodsThe malaria incidence,and its symptoms,mosquito preventive measures,Anopheles density,mosquito biting rates and related factors were investigated in malaria epidemic villages as surveillance sites such as Guanshan Town of Suining County,Tangzhang Town of Tongshan County,Tianganghu town of Sihong County,Qiuji Town of Xuyi County and Zhangzhu Twon of Yixing City.ResultsIn 2006,the bednet coverage was 20.29% and bednet-using rate was 34.32% in 27903 residents of 7921 households of 15 administrative villages.In 2005,750 Anopheles sinensi were captured from 50 bednets in the early morning,the human biting ratio was 0.17/person per night,and in 2006,1927 Anopheles sinensi were captured from 50 bednets in the early morning,human biting ratio was 0.38/person per night.The average blood smear checking rate was 2.72%(6089 people)and the average positive rate was 0.48%(29 plasmodium positive individuals).ConclusionThe lower blood smear microscopy testing,few positive rates of febrile patients and increased Anopheles sinensis density were the main factors of malaria relapses in the area of the North Huaihe River in Jiangsu Province.