Kassem H A, Hassan A N
Institute of Environmental Studies and Research, Ain Shams University, Postal Code 11566, Cairo, Egypt.
Ann Trop Med Parasitol. 2003 Jul;97(5):521-6. doi: 10.1179/000349803235002461.
The ovarian development and blood-feeding of Phlebotomus bergeroti were investigated using a laboratory colony derived from Egyptian flies. Most (89%) of the females in this colony were autogenous. The level of ovarian development observed at the time of blood-feeding varied between Christophers' stages IIB and V, indicating that vitellogenesis did not inhibit blood-feeding and that the females that ingested blood before their initial egg-laying were facultative, not obligatory, blood-feeders. The females ingested blood 2-8 days after they had emerged, the probability of a female taking an offered bloodmeal being highest between days 4 and 7 post-emergence. Blood-feeding significantly increased fecundity, significantly reduced the number of eggs that were not laid although apparently mature, and decreased the mean duration of the gonotrophic cycle by almost 1 day. Bloodmeals increased fecundity by stimulating the previtellogenic primary follicles of the autogenous females to precipitate yolk, possibly by initiating concurrent vitellogenesis in the primary and secondary follicles of the same ovarioles. Autogeny in P. bergeroti probably has little influence on the transmission of Leishmania parasites by this species.
利用源自埃及果蝇的实验室群体，对伯氏白蛉的卵巢发育和吸血情况进行了研究。该群体中大多数（89%）雌性为自体产卵型。吸血时观察到的卵巢发育水平在克里斯托弗斯IIB期至V期之间变化，这表明卵黄生成并不抑制吸血，且在初次产卵前吸血的雌性是兼性而非 obligatory吸血者。雌性在羽化后2至8天吸血，羽化后第4天至第7天雌性接受提供血餐的概率最高。吸血显著提高了繁殖力，显著减少了虽明显成熟但未产出的卵的数量，并使生殖营养周期的平均持续时间缩短了近1天。血餐通过刺激自体产卵型雌性的卵黄生成前初级卵泡沉淀卵黄来提高繁殖力，可能是通过在同一卵巢小管的初级和次级卵泡中启动同步卵黄生成来实现的。伯氏白蛉的自体产卵可能对该物种传播利什曼原虫寄生虫影响不大。 （注：这里“obligatory”原文有误，推测可能是“obligate”，意为“专性的” ）
