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Studies on Onchocerca cervicalis Railliet and Henry 1910: 3. Morphological and taxonomic studies on Onchocerca cervicalis from British horses

Published online by Cambridge University Press:  05 June 2009

Philip S. Mellor
Philip S. Mellor
Affiliation:
Winches Farm Field Station, London School of Hygiene and Tropical Medicine, St. Albans, Hertfordshire*
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Abstract

Distinct morphological differences were found between microfilariae of Onchocerca cervicalis in the uterus of the adult and those in the skin of the horse, suggesting that development occurs during migration from the adult worm to the skin.

Uterine microfilariae can be divided into two types which represent stages of development not embryonic male and female worms.

Skin microfilariae of O. cervicalis were readily distinguishable from those of O. volvulus and O. gutturosa. Morphological comparisons between adult and larval O. cervicalis collected during this project with published descriptions of O. reticulata show that there is insufficient evidence for their specific separation.

The first two papers in this series have dealt with the prevalence of Onchocerca cervicalis in British horses and with the pathology caused by the parasite to the definitive host. The present paper is concerned with the morphology and taxonomy of the parasite, particularly the microfilarial stage.

Type
Research Article
Information
Journal of Helminthology , Volume 48 , Issue 2 , June 1974 , pp. 145 - 153
Copyright
Copyright © Cambridge University Press 1974

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