Changes in peripheral leukocyte populations of weak calf syndrome of Japanese black calves |
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| Authors: | Ohtsuka Hiromichi Fukunaga Narumi Hara Hidefumi Fukuda Sigeo Hayashi Tomohito Hoshi Fumio Yoshino Tomo-o Koiwa Masateru Kawamura Seiichi |
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| Institution: | Department of Veterinary Internal Medicine, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan. |
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| Abstract: | To clarify the cellular immune condition in Japanese Black (JB) calves with a weak syndrome, peripheral leukocyte populations were analyzed by flow cytometry. Twenty JB calves were divided into two groups based on clinical observations; one group of calves was weak, because they had experienced an onset of diarrhea within 3 days after birth and needed treatment (Group 1 ;n=10), and the other group of calves was healthy (Group 2; n=10). With regard to leukocyte populations, CD8(+) cells and gamma delta T cells in Group 1 were markedly lower than those in Group 2 during the experimental periods. It is possible that immune-insufficiency might be based on T lymphocyte function in weak syndrome JB calves during the growth process. |
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