A young male little grebe (Tachybaptus ruficollis), caught at Kobe in Hyogo Prefecture, Japan in December 1995, died of a severe infection with Eustrongylides tubifex Jagerskiold 1909 (Nematoda:Dioctophymatoidea). Numerous nematodes were found in the lumen of the proventriculus, attaching to the mucosa, and some were penetrating into muscle layer. Histopathologically, severe inflammation was found around the nematodes. E.tubifex may be one of factors contributing to the mortality of wild little grebes. 野生カイツブリ(Tachybaptus ruficollis)一羽が兵庫県下で衰弱のために保護され死亡した。剖検により腺胃漿膜面に付着する多数の線虫(Eustrongylides tubifex)が認められ, 筋層を貫通して内腔に頭部もしくは尾部を露出していた。病理組織学的には線虫が侵入した周囲組織に炎症性細胞浸潤を伴う高度な病変が認められ, 本線虫寄生が野生における死因のひとつになっていると推察された。
Fatal Eustrongylidosis in a Young Wild Little Grebe (Tachybaptus ruficollis) from Japan
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