十和田湖周边日本黑熊（Ursus thibetanus japonicus）丝虫感染情况调查。
Survey of filarial infection in Japanese black bears (Ursus thibetanus japonicus) around Lake Towada area.
作者信息
Kusakisako Kodai, Asano Erika, Kaneda Nanami, Kamiharako Yuichi, Haraguchi Asako, Hakozaki Jun, Nakayama Kazuhiko, Nakamura Sakure, Hasan Hajar, Nakanome Naoki, Wahid Isra, Shindo Junji, Ikadai Hiromi
机构信息
Laboratory of Veterinary Parasitology, School of Veterinary Medicine, Kitasato University, Aomori, Japan.
Animal Health Technology Department, Yamazaki Professional Collage of Animal Health Technology, Tokyo, Japan.
出版信息
J Vet Med Sci. 2025 Sep 1;87(9):1026-1030. doi: 10.1292/jvms.25-0067. Epub 2025 Jul 1.
In this study, we examined filarial infections in Japanese black bears around the Lake Towada area from 2020 to 2022. Microfilariae were observed in 81.6% of blood smears. Consistent with previous findings in Iwate Prefecture, polymerase chain reaction (PCR) analysis detected Dirofilaria ursi (89.7%) and Mansonella sp. (66.7%) in extracted blood DNA. The body size of D. ursi microfilariae matched previous reports, whereas Mansonella sp. microfilariae were smaller than those of D. ursi and other known species. Although we attempted to identify Mansonella sp. adult filariae using PCR, all recovered adults were D. ursi; no adult Mansonella sp. were detected. Further studies are needed to better identify and understand both the adult filariae and microfilariae of Mansonella sp. in Japanese black bears.
在本研究中，我们调查了2020年至2022年十和田湖周边日本黑熊的丝虫感染情况。在81.6%的血涂片中观察到了微丝蚴。与岩手县之前的研究结果一致，聚合酶链反应（PCR）分析在提取的血液DNA中检测到了熊恶丝虫（89.7%）和曼氏丝虫属（66.7%）。熊恶丝虫微丝蚴的体型与之前的报道相符，而曼氏丝虫属微丝蚴比熊恶丝虫及其他已知物种的微丝蚴更小。尽管我们尝试用PCR鉴定曼氏丝虫属成虫，但所有回收的成虫均为熊恶丝虫；未检测到曼氏丝虫属成虫。需要进一步研究以更好地鉴定和了解日本黑熊体内曼氏丝虫属的成虫和微丝蚴。
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