1/2. Zoonotic onchocerciasis caused by a parasite from wild boar in Oita, japan. A comprehensive analysis of morphological characteristics of the worms for its diagnosis.Histological examination of a nodule removed from the back of the hand of a 58-year-old woman from Oita, Kyushu, japan showed an Onchocerca female sectioned through the posterior region of the worm (ovaries identifiable) and young (thin cuticle). Six Onchocerca species are enzootic in that area: O. gutturosa and O. lienalis in cattle, O. suzukii in serows (Capricornis crispus), O. skrjabini and an Onchocerca sp. in Cervus nippon nippon, and O. dewittei japonica in wild boar (sus scrofa leucomystax). Diagnostic characters of female Onchocerca species, such as the cuticle and its ridges, change along the body length. tables of the histologic morphology of the mid- and posterior body-regions of the local species are presented. In addition, it was observed that transverse ridges arose and thickened during the adult stage (examination of fourth stage and juvenile females of O. volvulus). The specimen described in this report, with its prominent and widely spaced ridges, was identified as O. d. japonica. Four of the 10 zoonotic cases of onchocerciasis reported worldwide were from Oita, three of them being caused by O. d. japonica, the prevalence of which in local wild boar was 22 of 24 (92%).- - - - - - - - - - ranking = 1keywords = onchocerciasis (Clic here for more details about this article) |
2/2. A human case of zoonotic onchocerciasis in japan.A 2-year-old girl living in southwestern japan had a nodule of 2 months' duration on the left foot. A biopsy from the lesion showed transverse sections of a worm surrounded by granulomatous tissue. The worm was identified as an Onchocerca sp. from the morphological characteristics such as relatively thick cuticles, annular ridges on the cortical layer, and high somatic muscles. Positive serological tests using ELISA for Onchocerca gutturosa and onchocerca volvulus supported the diagnosis. This was the first case of zoonotic Onchocerca infection detected in japan. The clinicopathological aspects of zoonotic onchocerciasis of this case were discussed.- - - - - - - - - - ranking = 1keywords = onchocerciasis (Clic here for more details about this article) |