KUSAKISAKO K, NIIYAMA H, ASANO E, HARAGUCHI A, HAKOZAKI J, NAKAYAMA K, NAKAMURA S, SHINDO J, KUDO N, IKADAI H. Morphological and molecular phylogenetical identification of <i>Tricodectes pinguis</i> from Japanese black bears (<i>Ursus thibetanus japonicus</i>) in Aomori Prefecture, Japan.
J Vet Med Sci 2022;
84:1015-1018. [PMID:
35644573 PMCID:
PMC9353088 DOI:
10.1292/jvms.22-0107]
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Abstract
Trichodectes pinguis, referred to commonly as the bear-biting louse, has been reported in several bear species. However, graphical (blurred or coarse) and genetic
information on the louse is limited. In this study, we identified T. pinguis collected from Japanese black bears in the Aomori Prefecture, Japan. We confirmed 12S rDNA
sequences derived from the collected T. pinguis and performed molecular phylogenetic analysis based on 12S rDNA. The analysis revealed the parasitic louse to be T.
pinguis. Interestingly, the body size of T. pinguis found in this study was smaller than the previous recorded body size of them in Japan and Turkey. To better
understand the biting louse infesting bears, morphometric and genetic information from other bear hosts needs to be accumulated.
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