Rubio-Palis Y
Division de Investigaciones, Escuela de Malariologia y Saneamiento Ambiental, Maracay, Venezuela.
Am J Trop Med Hyg. 1994 Apr;50(4):420-4. doi: 10.4269/ajtmh.1994.50.420.
The vectorial capacities of Anopheles nuneztovari, An. albitarsis s.l., and An. triannulatus to transmit Plasmodium vivax in western Venezuela were estimated in different seasons. In general, there was a decrease in the vectorial capacities of the three species during the dry season, which seems to be due mainly to a reduction in the mosquito biting populations. Comparing the observations made during the two wet seasons, there was a decrease in the vectorial capacities of the three species due to different factors for each species. In An. nuneztovari, the reduction in vectorial capacity seems to be due to a reduction in the human blood index (HBI); in An. albitarsis, it is probably due to a reduction in the HBI and a slight reduction in parity, whereas in An. triannulatus, the cause is probably a reduction in the mosquito biting population and in parity. The overall reduction in vectorial capacities of the three anopheline species in 1989 compared with the vectorial capacities in 1988 could partly explain the marked reduction in prevalence from 46.2 per 1,000 population in 1988 to 7.5 per 1,000 population in 1989.
在委内瑞拉西部的不同季节，对努氏按蚊、白跗按蚊复合组及环纹按蚊传播间日疟原虫的媒介能量进行了评估。总体而言，这三种按蚊的媒介能量在旱季有所下降，这似乎主要是由于蚊虫叮咬人群数量减少所致。比较两个雨季期间的观察结果，由于每种按蚊的影响因素不同，这三种按蚊的媒介能量均有所下降。对于努氏按蚊，媒介能量的降低似乎是由于人群血指数（HBI）下降；对于白跗按蚊，可能是由于HBI下降和平产率略有降低；而对于环纹按蚊，原因可能是蚊虫叮咬人群数量和平产率下降。与1988年的媒介能量相比，1989年这三种按蚊的媒介能量总体下降，这在一定程度上可以解释患病率从1988年的每千人口46.2例显著下降到1989年的每千人口7.5例的原因。
