Frequent blood-feeding and restrictive sugar-feeding behavior enhance the malaria vector potential of Anopheles gambiae sl and An-funestus (Diptera: Culicidae) in western Kenya
Frequent blood-feeding and restrictive sugar-feeding behavior enhance the malaria vector potential of Anopheles gambiae sl and An-funestus (Diptera: Culicidae) in western Kenya
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DOI：
10.1093/jmedent/33.4.613
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发表时间：
1996-07-01
影响因子：
2.1
通讯作者：
Beier, JC
中科院分区：
文献类型：
--
作者：
Beier, JC
研究了冈比亚按蚊和安按蚊的自然摄血和摄糖行为。funestus Giles在肯尼亚西部的两个地点。在疟疾寄生虫传播高峰期，1569只在室内休息的雌蚊中有85%食用新鲜血液。55.4%的经血喂养的静息雌虫和72.0%的寻宿主雌虫的卵母细胞处于IV期或V期，这为雌虫在产卵前再次进食提供了有力的证据。这种淋养失调在两国全年都很常见。冈比亚和安哥拉。funestus。室内采集的新鲜采血蚊子的淋养循环测定表明，1287只蚊中有60.0%为淋养循环。冈比亚和974的60.0%。Funestus在一次血餐后产卵。产卵时间不规律，变异系数较高。冈比亚s.l (44.0%)；funestus(35.9%)。与频繁的血液喂养相关的是令人惊讶的低糖喂养率；1183只在室内休息的按蚊中只有6.3%和236只寻找宿主的按蚊中只有14.4%对果糖呈阳性。频繁吸血的自然模式、全年的淋养失调、不规则的产卵周期和有限的糖摄食表明，按蚊具有复杂的行为和生理手段来适应其环境。例如，在肯尼亚西部，适应频繁吸血的羚羊。冈比亚和安哥拉。Funestus增强了它们传播疟疾寄生虫的能力，远远超出了媒介能力的标准测量所预测的能力。
Natural blood-feeding and sugar-feeding behaviors were investigated for populations of Anopheles gambiae s.l. and An. funestus Giles at 2 sites in western Kenya. During peak levels of malaria parasite transmission, >85% of 1,569 indoor-resting females contained fresh blood meals. Findings that up to 55.4% of blood-fed resting females and 72.0% of host-seeking females had either stage IV or V oocytes provided strong evidence that females were refeeding before oviposition. Such gonotrophic discordance was common throughout the year for both An. gambiae s.l. and An. funestus. Determinations of gonotrophic cycles for freshly blood-fed mosquitoes collected inside houses indicated that only 60.0% of 1,287 An. gambiae s.l. and 60.0% of 974 An. funestus oviposited eggs after a single blood meal. The timing of oviposition was irregular as indicated by relatively high coefficients of variation for An. gambiae s.l. (44.0%) and An. funestus (35.9%). Associated with frequent blood feeding was a surprisingly low rate of sugar feeding; only 6.3% of 1,183 indoor-resting and only 14.4% of 236 host-seeking anophelines were positive for fructose. Natural patterns of frequent blood feeding, year-round gonotrophic discordance, irregular oviposition cycles, and limited sugar feeding illustrate that anopheline mosquitoes have complex behavioral and physiologic means for adapting to their environment. In western Kenya, for example, adaptations for frequent blood feeding by An. gambiae s.l. and An. funestus potentiates their ability to transmit malaria parasites, well beyond that predicted by standard measures of vectorial capacity.