Epidemiology and deworming of gastrointestinal nematodes in cattle of public pastures in Hokkaido
2018
Kitano, N. (Rakuno Gakuen University Graduate School, Ebetsu, Hokkaido (Japan). Graduate School of Dairy Science) | Fukumoto, S. | Tokuyama, K. | Ikeda, K. | Takahashi, T.
The field study conducted to investigate infestation of gastrointestinal nematodes (GINs) and deworming practice in public pastures in Hokkaido showed that 1) infestation of GINs and Coccidia were yet wide-spread over Hokkaido, 2) fecal egg counts of GINs tended to be high in the northern and southern regions, 3) majority of deworming practice was endectocides treatment that were given three times during the season; upon arrival at the pasture, summer season and upon departure, 4) in approximately more than 70% of the studied pastures, deworming had been continuously practiced over 10 years and 5) it was shown that fecal egg counts of GINs were significantly higher in the small scale pastures than the large scale ones. Effective utilization of public pastures contributes to achieve 1) homogeneous heifer population in the region and 2) improvement of future performance of the animals. To effectively utilize public pastures, 1) appropriate deworming regimen reflecting geographical location and pasture size, and 2) monitoring of fecal egg counts are advisable. A voiding excess use of endectocides such as ivermectin and applying a minimal dose that well exerts good effect with an appropriate timing of dosing would allow efficiency and health in the heifer production, naturally, contributing to livestock industry in Japan.
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