Immunity to sarcocystosis: modification of intestinal coccidiosis, and disappearance of sarcocysts in dairy goats

Veterinary Parasitology
J P Dubey

Abstract

Fifty, 2-3 month old dairy goats were each vaccinated orally with 10000 sporocysts of Sarcocystis capracanis and 25 age-matched goats served as uninoculated controls. Groups of vaccinated and control goats were challenged with lethal doses of S. capracanis at 95, 113, 205, and 274 days post-vaccination. Vaccinated goats developed subclinical sarcocystosis. Twenty-three vaccinated goats and 1 control goat died of intestinal coccidiosis and bacterial pneumonia, 15-118 days after vaccination. Myositis and degenerating sarcocysts were seen in muscles of goats necropsied at 90-186 days postvaccination. Very few, or no sarcocysts were seen in goats necropsied at 272 and 332 days post-vaccination. Vaccinated goats survived a lethal challenge inoculation indicating persistent protective immunity.

References

Jan 1, 1973·International Journal for Parasitology·W H Ewers
Nov 1, 1980·New Zealand Veterinary Journal·G H Collins

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Citations

Sep 1, 1984·Veterinary Parasitology·R Fayer, J P Dubey
Feb 1, 1992·Epidemiology and Infection·G SaviniP Seneviratna
Dec 10, 2008·Experimental Parasitology·Konstantinos I TerpsidisIoannis Th Theodoridis
Oct 1, 1988·Immunology and Cell Biology·H S GillK M Moriarty

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