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Veterinary Pathology, Vol 23, Issue 5 556-562, Copyright © 1986 by American College of Veterinary Pathologists

ARTICLES

Experimental Babesia bovis infection in Holstein calves

J. I. Everitt, J. A. Shadduck, C. Steinkamp and G. Clabaugh

One intact and two splenectomized Holstein calves were infected intravenously with a Mexican strain of Babesia bovis and killed following the onset of severe clinical disease. A light and electron microscopic study was conducted on selected tissues to examine the relationship between parasitized erythrocytes and microvascular endothelial cells. The pattern and degree of specific organ sequestration of parasitized erythrocytes was assessed and correlated to lesions. Red blood cells infected with Babesia bovis exhibited stellate membrane protrusions. This morphological change appeared to mediate erythrocyte sequestration in the microvascular and capillary beds of the brain, kidney, and adrenal gland by an as yet unknown mechanism(s).




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Copyright © 1986 by the American College of Veterinary Pathologists.