Japanese Journal of Veterinary Research;Volume 21, Number 3

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HELMINTHS OF STRAY DOGS IN SAPPORO, HOKKAIDO, JAPAN

KAMIYA, Haruo;ISHIMOTO, Takashi;ARAKI, Jun;KAMIYA, Masao

Permalink : http://hdl.handle.net/2115/2017
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Abstract

Helminth parasites of 32 males and 29 females of adult stray dogs captured in Sapporo were investigated in September, 1972. Helminths were found in 47 (77.0%) of 61 dogs ; 27 (84.4%) of 32 males and 20 (69.0%) of 29 females. The rate of helminth infection in dogs in Sapporo is lower than that of other districts of Japan. Eight helminth species belonging to 8 genera were recovered : Clonorchis sinensis (rate of infection 1.6%), Plagiorchis muris (19.7%), Trichuris vulpis (44.3%), Dirofilaria immitis (24.6%), Ancylostoma caninum (19.7%), Toxocara canis (3.3%), Toxascaris leonina (3.3%), Corynosoma sp.(1.6%). No cestode was recovered. In the infected dogs, cases parasitized by one, two and three species of helminths were 57.4%, 31.9% and 10.6% respectively. The case of Clonorchis sinensis is the first one recorded in Hokkaido. It is obscure whether this dog had been infected in Hokkaido or not, but Bithynia ussuriensis, which may serve as the first intermediate host, has been found in Hokkaido. Therefore, the establishment of life cycle of C. sinensis might be undeniable. The case of Corynosoma sp. in dogs is the first description in Japan. Infection rates in general and those of T. vulpis, A. caninum, D. immitis and P. muris were higher in males than females.

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