Immune response in mice infected by Encephalitozoon cuniculi and suppressed by dexamethasone

Valenčáková, Alexandra and Halánová, Monika and Bálent, P. and Dvorožnáková, Emília and Jamborová, Erika and Lešník, F. and Neuschl, F. and Páleník, L. and Čisláková, Lýdia (2004) Immune response in mice infected by Encephalitozoon cuniculi and suppressed by dexamethasone. Acta Veterinaria Hungarica, 52 (1). pp. 61-69. ISSN 0236-6290

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Abstract

Several indicators ofimmune response were observed in immunocompetent mice of the ICR line and those suppressed by dexamethasone upon their experimental infection with the microsporidia of Encephalitozoon cuniculi. The mice were infected by one-shot intraperitoneal administration of 5×107 pathogenic spores. On Days 7, 14, 28 and 42 after infection, peripheral blood leukocyte phagocytic activity was determined and compared, including phagocytic index and the blastogenic response in spleen cells to mitogenic activation by concanavalin A and phytohaemagglutinin. The results point to the fact that E. cuniculi itself can cause a significant decrease in phagocytic activity of phagocytic leukocytes in the early stages of infection as well as a remarkable decrease in the proliferative response of spleen cells to T-cellular mitogens.

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