Studies on Gnathostomes in Fujian.Ⅱ.A Study on the Epidemiology of Gnathostoma in Sanming and Pucheng and on Morphological observations in Intestinal tract of Adult G. hispidum and 3 Spccies of Larvae Gnathostoma

Abstract

报告三明地区是猪刚刺颚口和陶氏颚口线虫病散发性流行区。猪刚刺颚口线虫感染率为5%，陶氏颚口线虫在家猪和野猪的感染率分别为4%和60.3%。浦城县是刚刺颚口线虫病散发性流行区，猪的感染率为4%，野猪感染率高达75%。鳝鱼是刚刺颚口线虫的重要第二中间宿主，也是主要传病媒介，三明地区鳝鱼的感染率为11.3%。我国（省）三种人兽共患颚口线虫第3期幼虫肠道上皮细胞核的数目有明显不同，棘颚口线虫每个上皮细胞多数有3—7个核，陶氏颚口线虫多数有2个核，刚刺颚口线虫成虫和幼虫大多数含有一个明显的核。文中还讨论了颚口线虫病的防治和诊断。From 1992 to 1994,a survey of epidemiology was carried out in Sanming and Pucheng,Fujian.The results revealed that Sanming district was a sporadic epidemic area of both Gnathostoma hispidum and G.doloresi,where the inFection rate of G.hispidum in pig was 5%(5/100), while the InFection rates of G.doloresi in pig and wild boars,Sus scrofa were 4%(4/100)and 60.3%(35/58)respectively.It was Found that Pucheng county was a sporadic epidemic area of G.hispidum,where the inFection rates of the parasite in pig and wild boars were 4%(2/50)and 75%(15/20)respectively.Monopterus albus was an important second intermediate host of G.hispidum,its incidence was 11.3%(12/106).It is well know that 3species of Gnathostoma,G.spinigerum,G.doloresi and G.hispidum,are distributed in China ,In the present study,cross sections of the advanced 3rd-stage larva(ADL3)were compared among 3 species,Gspinigerum,G,doloresi and hispidum(adult and larva).The results showed that the characterics of the cross sections of intestinal regions of the larvae of 3 species are generally in agreement with the observational conclusion made by Akahane et al.(1986) in cross sections of 3 species of ADL3 Gnathostoma.In larva G.spinigerum, there were 3-7 nuclei in an epithelial cell,in larva G.doloresi, most of that cell,had two nuclei.In addition,in both adult and larva of G.hispidum,most of the epithelial cells had one nuclei.As mentioned above,these diFFerence are helpFul in identiFying cross sections of 3 species of From human cases of gnathostomiasis.福建省自然科学基