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Morphological variation between isolates of the nematode Haemonchus contortus from sheep and goat populations in Malaysia and Yemen

Published online by Cambridge University Press:  26 November 2012

A.A. Gharamah ,
W.A. Rahman  and
M.N. Siti Azizah
A.A. Gharamah*
Affiliation:
School of Biological Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia
W.A. Rahman
Affiliation:
School of Biological Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia
M.N. Siti Azizah
Affiliation:
School of Biological Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia
*
*E-mail: ghrama77@yahoo.com
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Abstract

Haemonchus contortus is a highly pathogenic nematode parasite of sheep and goats. This work was conducted to investigate the population and host variations of the parasitic nematode H. contortus of sheep and goats from Malaysia and Yemen. Eight morphological characters were investigated, namely the total body length, cervical papillae, right spicule, left spicule, right barb, left barb, gubernaculum and cuticular ridge (synlophe) pattern. Statistical analysis showed the presence of morphological variation between populations of H. contortus from Malaysia and Yemen, with minor variation in the synlophe pattern of these isolates. Isolates from each country were grouped together in the scatterplots with no host isolation. Body, cervical papillae and spicule lengths were the most important characters that distinguished between populations of the two countries. This variation between Malaysia and Yemen may be attributed to geographical isolation and the possible presence of a different isolate of this worm in each country.

Type
Research Papers
Information
Journal of Helminthology , Volume 88 , Issue 1 , March 2014 , pp. 82 - 88
Copyright
Copyright © Cambridge University Press 2012 

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