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Studies on the pathogenesis of Babesia argentina and Babesia bigemina infections in splenectomised calves


, : Studies on the pathogenesis of Babesia argentina and Babesia bigemina infections in splenectomised calves. Zeitschrift fur Parasitenkunde 39(Heft 2): 85-102

In both infections, renal damage prededed hepatic damage by one to two days. Blood urea nitrogen levels increased from about 0.30 mg% to a peak of 4.12 plus or minus 1.90 mg% in one group and up to 8-10 times in others. Conjugated bilirubin levels fell terminally. Sulphobromophthalein (BSP) fractional clearance levels fell in severe B. argentina cases but remained relatively unaltered in B. bigemina infections. A biphasic BSP fractional clearance curve was present in both normal and infected calves. Serum and urine sodium concentrations remained static. Serum potassium concentration fell in some infected calves. Urine potassium levels rose in all groups. Tubulonephrosis and degeneration of the convoluted and collecting tubules was present in severe infections. Vascular congestion was frequently observed, but vascular stasis only occurred in severe B. argentina cases. Glomerular shrinkage was usual in moderate and severe cases. Severe hepatic centrilobular and midzonal degeneration and necrosis was common in all severe cases. Vascular congestion accompanied this, but stasis was present only in some B. argentina infections.

US$19.90

PMID: 5081456

DOI: 10.1007/bf00329638


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