Prevalence of Trichinella T9 in Japanese black bears (Ursus thibetanus japonicus) in Iwate prefecture, Japan
2021
Tominaga, Taisuke | Aoki, Mikiko | Biswas, Peru Gopal | Hatta, Takeshi | Itagaki, Tadashi
Trichinellosis is a meat-borne zoonotic disease caused by nine Trichinella speices and three unclassified genotypes. In Japan, four domestic outbreaks of human trichinellosis are reported sporadically and were associated with the consumption of wild bear meat. This study examined Trichinella prevalence and its species in black bears, Ursus thibetanus japonicus in Iwate prefecture, Japan. Trichinella T9 larvae identified molecularly were first detected in 1.4% (2/144) of the masseters of black bears examined, and their densities were low (1 and 0.3 larvae /g muscle, respectively). Two cytochrome C oxidase I (COI) haplotypes (sequences) of Trichinella T9 were found in distinct bear populations, suggesting that Trichinella T9 populations isolated genetically by bear populations would occur in Japan.
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