Haroun N H
Department of Medical Malacology, Theodor Bilharz Research Institute, Giza, Egypt.
J Egypt Soc Parasitol. 1996 Aug;26(2):327-35.
Biomphalaria alexandrina snails were collected from irrigation canals at Gize and Dakahlia Governorates. They were exposed to strains of Schistosoma mansoni from these localities. The snails showed different rates of susceptibility to the parasite. There was a high range of snail sensitivity to S. mansoni infection (53.9%-60.7%) when snail populations and parasite strains were from the same governorate. Supporting this was the high cercarial production from infected snails of these cases (288.2 cercariae/ snail/week of Dakahlia-Dakahlia group). However, snail populations and parasite strains from different Governorates (Gize-Dakahlia) exhibited poor values of snail sensitivity and cercarial production with significant variations from those of the group of the same governorate.
亚历山大双脐螺从吉萨省和达卡利亚省的灌溉渠中采集。它们接触来自这些地区的曼氏血吸虫菌株。这些螺对该寄生虫表现出不同的易感性。当螺种群和寄生虫菌株来自同一省份时，螺对曼氏血吸虫感染的敏感性范围较高（53.9%-60.7%）。这些病例中受感染螺的尾蚴产量很高（达卡利亚-达卡利亚组为288.2条尾蚴/螺/周），这也支持了上述情况。然而，来自不同省份（吉萨-达卡利亚）的螺种群和寄生虫菌株表现出较差的螺敏感性和尾蚴产量值，与同一省份组的值有显著差异。
