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Comparison of the peripheral blood leukocyte population between Japanese Black and Holstein calves

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ABSTRACT

Japanese black (JB) calves have greater susceptibility to infectious diseases compared to Holstein (Hol) calves. In order to clarify the differences in cellular immune status between JB and Hol calves, the leukocyte population and lymphocyte proliferative ability were analyzed. In total 200 healthy calves, 1 day to 14 weeks of age, were examined: 105 JB and 95 Hol calves. Lower numbers in peripheral blood and percentage in peripheral blood mononuclear cells of CD3+TcR1-N12+ T cells and major histocompatibility complex class-II+CD14- B cells were observed in the JB compared to the Hol. The percentage of TcR1-N12+CD25+ T cell in the JB was significantly lower than that of the Hol at 4–6, and 8–10 weeks. Interleukin (IL)-2 sensitivity in the JB was lower than that in the Hol, and significant differences were observed in age groups of 6–8 weeks and 10–14 weeks. These findings indicated that the lower numbers of γδ T cells and B cells in the JB compared to the Hol might be associated with the specificity of the immune systems in JB calves.
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Keywords: Holstein; Japanese Black; calves; leukocyte population

Document Type: Research Article

Affiliations: 1: Veterinary Internal Medicine, School of Veterinary Medicine, Kitasato University, Towada 2: Kohiruimaki Large Animal Clinic, Tohoku, Aomori, Japan

Publication date: February 1, 2011

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