Farid H A, Morsy Z S, Gad A M, Ramzy R M, Faris R, Weil G J
Department of Entomology, Faculty of Science, Ain Shams University.
J Egypt Soc Parasitol. 1997 Aug;27(2):355-64.
Age-specific levels of Wuchereria bancrofti infection determined by microfilaremia in filarious 10 to 60 years old males from endemic village revealed that microfilaria intensity was higher in younger age, presumably because of increased vector biting rate of younger individuals. Out of 1334 Cx. pipiens captured while attempting to bite 51 child-adult bait pairs, 54.0% selected a host in the 10-15 age group. Biting preference towards children was more evaluated (79.2%) later than earlier in the night. Frequency distribution of age-specific biting collections indicated that 62.7% recorded exceeding numbers of bites on children, 21.6% adult biting, and 15.7% equal biting of one of the baits in the pair. Furthermore, 21.6% of the children were exposed to nightly bites ranging from 21 to 64 and only 7.8% of the adults experienced from 21 to 85 bites. Mosquito biting intensity averaged 14.2 and 11.6 bites/night for children and adults respectively. Children experienced 22.4% more bites per night than adults. Thus, children are more exposed to filaria infection and seem to represent an important source of infection. It is concluded that attempts at widespread control of filariasis in the densely populated Nile Delta, where youngsters may account for an immense proportion of the local population, should concentrate on immatures.
通过检测来自流行村庄的10至60岁男性丝虫病患者的微丝蚴血症来确定特定年龄的班氏吴策线虫感染水平，结果显示微丝蚴强度在较年轻年龄段更高，这可能是因为较年轻个体的媒介叮咬率增加。在试图叮咬51对儿童-成人诱饵的过程中捕获的1334只致倦库蚊中，54.0%选择了10 - 15岁年龄组的宿主。对儿童的叮咬偏好（79.2%）在夜间较晚时候比早期更为明显。按年龄划分的叮咬采集频率分布表明，62.7%记录到叮咬儿童的次数超过成人，21.6%为叮咬成人，15.7%为对诱饵对中一方的叮咬次数相等。此外，21.6%的儿童每晚遭受21至64次叮咬，而只有7.8%的成人经历21至85次叮咬。儿童和成人的蚊子叮咬强度平均分别为每晚14.2次和11.6次。儿童每晚遭受的叮咬次数比成人多22.4%。因此，儿童更容易感染丝虫病，似乎是一个重要的感染源。得出的结论是，在人口密集的尼罗河三角洲地区，年轻人可能在当地人口中占很大比例，若要广泛控制丝虫病，应集中针对幼虫阶段。
