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1 July 1981 STUDIES ON CROSS-TRANSMISSION AND PATHOGENICITY OF Haemonchus contortus IN WHITE-TAILED DEER, DOMESTIC CATTLE AND SHEEP
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Abstract

Experiments were conducted to compare the relative pathogenicity and infectivity of deer- and cattle-derived Haemonchus contortus for three hosts, viz., white-tailed deer, cattle and domestic sheep. Parameters evaluated for all animals were: general physical condition, basic hematologic values, fecal egg counts and parasite infectivity rates. Clinical signs attributable to H. contortus infections were not observed in any of the experimental animals. Deer harboring H. contortus burdens > 70 worms/kg body weight had decreased packed cell volume, hemoglobin and total serum protein values. Statistical analyses indicated there was not a significant difference (P>.05) in infectivity of deer-derived H. contortus in these hosts. No significant difference (P>.05) in infectivity for deer was noted between deer-derived H. contortus and cattle-derived H. contortus. Morphometric comparisons of helminths recovered indicated that parasites of deer and cattle origin were both compatible with the description for H. contortus. Results suggest that cross-transmission of H. contortus occurs between deer and domestic livestock.

McGHEE, NETTLES, ROLLOR, PRESTWOOD, and DAVIDSON: STUDIES ON CROSS-TRANSMISSION AND PATHOGENICITY OF Haemonchus contortus IN WHITE-TAILED DEER, DOMESTIC CATTLE AND SHEEP 1
MICHAEL B. McGHEE, Victor F. Nettles, EDWARD A. ROLLOR, ANNIE K. PRESTWOOD, and WILLIAM R. DAVIDSON "STUDIES ON CROSS-TRANSMISSION AND PATHOGENICITY OF Haemonchus contortus IN WHITE-TAILED DEER, DOMESTIC CATTLE AND SHEEP ," Journal of Wildlife Diseases 17(3), (1 July 1981). https://doi.org/10.7589/0090-3558-17.3.353
Received: 17 November 1980; Published: 1 July 1981
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