Yasuyuki Morishima

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Onchocerpa lupi was first isolated from a wolf in Russia. Since then, canine ocular onchocercosis has been increasingly reported, particularly in Europe and the United States. It is thought that blackflies and midges are the vectors of transmission, and it is possible that these vectors could transmit the parasite to humans. The first human case of O. lupi(More)
Mitochondrial DNA variation in the cytochrome b (cyt b) gene and the control region was examined in the red fox Vulpes vulpes from Japan, with special focus on the population divergence between Hokkaido and northern Honshu. Resultant haplotypes from Hokkaido were subdivided into two distinct groups (I and II), with an average genetic distance of 0.027 for(More)
Echinococcus multilocularis is a causative agent of human alveolar echinococcosis. The distribution of the parasite in Japan was thought to be limited to the northernmost insular prefecture of Hokkaido, where the Tsugaru Strait acts as a natural physical barrier against migration to Honshu, the mainland of Japan; however, in Aomori Prefecture, situated in(More)
An epidemiological investigation on echinococcosis was made in Jiuzhi County of Qinghai Province, western China. Ultrasonography and an indirect hemagglutination test revealed a morbidity of 8.0% (124/1,549) and a seroprevalence of 25.8% (287/1,113), respectively, in the Tibetan population. The morbidity in herdsmen (16.6%) and Buddhist priests (15%) was(More)
We studied the prevalence of intestinal parasites in animal companions in Saitama Prefecture, Japan, where no detailed data is currently available. Between May 1999 and December 2007, fecal samples were collected from 906 dogs and 1,079 cats in public animal shelters and examined by microscopy. Overall, prevalence of intestinal parasites in dogs was 38.6%(More)
Metacercariae, the encysted larval stage of flukes capable of infecting the final and/or paratenic hosts, of Paragonimus miyazakii and of both diploid and triploid forms of P. westermani are found in the Japanese freshwater crab, Geothelphusa dehaani, which acts as the second intermediate host in Japan. This crab is known as Sawagani in Japanese and is(More)
A total of 6 lung fluke species have been documented in Thailand, of which P. heterotremus is the most important, since it affects humans. Although P. westermani is found as metacercariae in the same crab species as P. heterotremus in Thailand, human infections with P. westermani have not been confirmed. To accurately discriminate between the individual(More)
Human dirofilariasis caused by infection with Dirofilaria worms has been frequently reported. The symptoms associated with infection by these filarial parasites, which are transmitted to humans by zooanthropophilic mosquitoes, are characterized by mainly pulmonary and subcutaneous nodules. Here, we report the first case in Vietnam of a subcutaneous(More)