摘要
1989年在儋县选点普查,山区和丘陵区分别有50％和62.5％的调查点捕获微小按蚊,滨海平原区未发现。1990年在该县丘陵区调查18个点,全部发现微小按蚊,占人饵诱捕按蚊组成的52.5％。调查显示当前微小按蚊习性倾向于外食性、外栖性和对人、牛相同的趋向性。各地微小按蚊的传播疟疾强度不同,外来垦殖人员居民点、农村居民点和农场居民点的疟疾感染率分别为10％、2.9％和0.5％。提示微小按蚊已由20多年来的残存分布上升为次要媒介,或为部分地区的主要媒介。
Anopheles minimus was once a main malaria vector in Hainan Island and had been e-liminated basically through the campaign of indoor residual spraying launched in 1959. It again became an incriminated vector of some focal malaria outbreaks in recent years. The present study was conducted in a selected county-Danxian and a typical hilly area-Feibar in the west part of Danxian county in 1989-1990.An. minimus was found in 50% and 62. 5 % of the surveyed sites at mountainous and hilly area of Danxian county,but not found in coastal region. An. minimus was found in all 18 sites surveyed in Feibar district constituting 52% of anopheline composition. Man-biting rate made by human-baited collection was 3. 2 before midniaght and 38. 2 when collected through whole night in some sites. However, the behaviour characteristics of An. minimus has changed. It has become exophilic,exophagic, and has an equal preference for man and cattle. The vectorial capacity of An. minimus estimated by quantitative data was in accord with malaria infection rate in Feibar district ,and the malaria infection rate among the inhabitants in three types of residential quarter with different socioeconomic conditions. Malaria infection rates of residential quarter of land-reclamation outcomers, villagers and state farm residents were 10%,2. 9% and 0. 5% respectively during 40 days from July to August,1990.Owing to the fact that An. minimus has become a secondary vector only next to An. dirus, with a wide range of distribution and a considerable different characteristics in behaviour compared to that before spraying campaign , it is suggested that a malaria control programme must be seriously planned to adjust the new problem of malaria epidemiology in Hainan Province.
出处
《中国寄生虫学与寄生虫病杂志》
CSCD
北大核心
1993年第2期120-123,共4页
Chinese Journal of Parasitology and Parasitic Diseases
基金
卫生部科学研究基金
关键词
疟疾
微小按蚊
生态习性
传疟作用
Malaria
An. minimus
ecological behaviour
role of malaria transmission
