Toxocara vitulorum infection in a yak (Bos mutus grunniens) calf from Tyrol (Austria)
2020
Schoener, Ellen | Wechner, Franz | Ebmer, David | Shahi-Barogh, Bita | Harl, Josef | Glawischnig, Walter | Fuehrer, Hans-Peter
The domestic yak Bos mutus grunniens is an important livestock animal in parts of Asia, especially of the Himalayan region, where people rely on it for meat, wool, milk and labour. In its countries of origin, the yak is commonly infected with the ascarid Toxocara vitulorum. This parasite mainly infects cattle (Bos taurus) and domestic buffalo (Bubalus bubalus) and is most commonly found in sub-tropical regions, but has been occasionally reported in more temperate climates, including several Central European countries.Here we describe a fatal case of toxocarosis in a yak calf in Tyrol in May 2018, which is the first report of these parasites in yaks in Austria. A moribund calf had to be euthanized and gross pathology showed masses of cream-coloured, up to 25 cm long nematodes filling the whole of the small intestine, as well as parts of the colon. PCR of parts of the mitochondrial cytochrome c oxidase subunit I gene was performed and sequence analysis confirmed the helminths as Toxocara vitulorum.
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