Molecular phylogenetical identification of bear roundworms (Baylisascaris transfuga) derived from wild Japanese black bears (Ursus thibetanus japonicus) around Lake Towada

The bear roundworm Baylisascaris transfuga has been identified in several host bears (Ursinae). However, limited genetic information is available on the bear roundworm in Japanese populations. This study evaluated the genetic composition of bear roundworms isolated from wild Japanese black bears ind...

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Bibliographic Details
Published in:Journal of Veterinary Medical Science 2024, Vol.86(9), pp.951-955
Main Authors: KUSAKISAKO, Kodai, KANEDA, Nanami, KAMIHARAKO, Yuichi, HARAGUCHI, Asako, HAKOZAKI, Jun, NAKAYAMA, Kazuhiko, HASAN, Hajar, NAKAMURA, Sakure, SHINDO, Junji, IKADAI, Hiromi
Format: Article
Language:English
Subjects:
Animals
Ascaridida Infections - parasitology
Ascaridida Infections - veterinary
Ascaridoidea - classification
Ascaridoidea - genetics
Ascaridoidea - isolation & purification
Baylisascaris transfuga
Body size
cytochrome c oxidase subunit II
Cytochrome-c oxidase
Electron Transport Complex IV - genetics
Genetic analysis
internal transcribed spacer 2
Japan
Lakes
Parasitology
phylogenetic analysis
Phylogeny
Population genetics
Population studies
Ursidae - parasitology
Ursus thibetanus japonicus
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Summary:The bear roundworm Baylisascaris transfuga has been identified in several host bears (Ursinae). However, limited genetic information is available on the bear roundworm in Japanese populations. This study evaluated the genetic composition of bear roundworms isolated from wild Japanese black bears indigenous to Lake Towada, Japan. First, we conducted genetic and/or molecular phylogenetic analyses based on cytochrome c oxidase subunit II and internal transcribed spacer 2 among Baylisascaris species. These analyses revealed that the identified roundworms were genetically B. transfuga. In addition, the average body size of the obtained roundworms in this study was almost the same as that previously reported for B. transfuga. This study represents an important step in genetic research on the roundworm B. transfuga in Ursinae bears not only from Japan but also from the rest of the world.
ISSN:0916-7250
1347-7439
1347-7439
DOI:10.1292/jvms.24-0142