Yacoubi B, Zekhnini A, Moukrim A, Rondelaud D
Département de Biologie, Faculté des Sciences, Agadir, Morocco.
Parasitol Res. 1999 Mar;85(3):239-42. doi: 10.1007/s004360050540.
Planorbarius metidjensis measuring 2 or 3 mm in diameter and originating from three populations in the Agadir province (Ida Ou Gnidif, Imouzzer, and Sidi Belkacem) were experimentally infected with Schistosoma haematobium to determine if the complete larval development of the parasite might be ensured by any snail population of the Agadir province and to compare the general characteristics of infection. No significant difference between the three populations was noted in the survival rates of snails when the first shedding occurred or in the prevalence of infection. The mean duration of the shedding period was significantly higher in the Imouzzer population (111 days versus 53-58 days). The total number of cercariae shed per mollusc was significantly lower in the Ida Ou Gnidif planorbids (1,398/snail versus 3,346 and 3,343/snail in the other 2 groups). The same rhythm in daily cercarial production was noted in the three snail groups, with the periodicity being 18-20 days. Despite some differences in parasite development between the three snail populations, the different populations of P. metidjensis can ensure the complete development of S. haematobium and maintain local transmission in the South of Morocco.
对来自阿加迪尔省三个地区（伊达乌吉迪夫、伊穆泽尔和西迪·贝尔卡塞姆）、直径为2或3毫米的梅蒂贾扁卷螺进行实验性感染埃及血吸虫，以确定阿加迪尔省的任何蜗牛种群是否能确保该寄生虫幼虫的完全发育，并比较感染的一般特征。在首次出现逸蚴时蜗牛的存活率或感染率方面，三个种群之间未发现显著差异。伊穆泽尔种群的逸蚴期平均持续时间显著更长（111天，而其他两组为53 - 58天）。伊达乌吉迪夫扁卷螺每只软体动物逸出的尾蚴总数显著更低（1398个/蜗牛，而其他两组为3346和3343个/蜗牛）。在三个蜗牛组中观察到每日尾蚴产生的节奏相同，周期为18 - 20天。尽管三个蜗牛种群在寄生虫发育方面存在一些差异，但梅蒂贾扁卷螺的不同种群能够确保埃及血吸虫的完全发育，并维持摩洛哥南部的本地传播。
