Omar M S, Franz M, Büttner D W
Tropenmed Parasitol. 1979 Mar;30(1):113-9.
A pilot study on onchocerciasis and sowda was carried out in the south-western region of the Yemen Arab Republic. Of 61 persons examined in eight villages 35 (= 57%) were found positive for microfilariae by the skin-snip method, 13 had typical manifestations of sowda, 17 had other onchocercal-suggestive skin lesions and five had subcutaneous nodules. A single larva of Simulium damnosum s.I. was collected in Wadi Barakani. Numerous larvae and pupae of S. ruficorne and S. hargreavesi were taken in fast-flowing streams in four localities. The examination of microfilariae and adult worms by scanning electron microscopy as well as the histochemical staining of microfilariae for the demonstration of acid phosphatase activity confirmed that the concerned filaria belongs to the species Onchocerca volvulus. No morphological differences could be detected between the smaller number of the examined worms from the Yemen and the extensive parasite material from Liberia, West Africa.
在阿拉伯也门共和国西南部地区开展了一项关于盘尾丝虫病和“sowda”的试点研究。在八个村庄检查的61人中，通过皮肤切片法发现35人（占57%）微丝蚴呈阳性，13人有典型的“sowda”表现，17人有其他盘尾丝虫病疑似皮肤病变，5人有皮下结节。在瓦迪巴拉卡尼采集到一只致倦库蚊的幼虫。在四个地点的湍急溪流中采集到大量红角蚋和哈氏蚋的幼虫和蛹。通过扫描电子显微镜检查微丝蚴和成虫，以及对微丝蚴进行组织化学染色以显示酸性磷酸酶活性，证实相关丝虫属于盘尾丝虫种。在也门检查的数量较少的蠕虫与来自西非利比里亚的大量寄生虫材料之间未检测到形态差异。
