Genetic variation of Haemonchus contortus (Trichostrongylidae) in sheep and goats from Malaysia and Yemen

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• 作者：A.A. Gharamah ; M.N. Siti Azizah ; W.A. Rahman
• 关键词：Haemonchus contortus ; ND4 ; ITS-2 ; Malaysia ; Yemen
• 刊名：Veterinary Parasitology
• 出版年：2012
• 出版时间：10 September, 2012
• 年：2012
• 卷：188
• 期：3-4
• 页码：268-276
• 全文大小：378 K

文摘

The large stomach worm, <em>Haemonchus contortusem>, commonly known as ¡°the barber's pole worm¡±, is a blood-sucking nematode found in the abomasa of sheep and goats. This work is the first documentation on the ND4 sequences of <em>H. contortusem> from sheep and goats in Malaysia and Yemen and the results provide a preliminary insight on the genetic differences of <em>H. contortusem> found in the two countries. In general, this study showed a high degree of diversity and low population structure of this species within the same country in comparison with higher genetic structuring at a wider geographical scale. The results also showed that the majority of genetic variance was within <em>H. contortusem> populations. The Malaysian sheep and goat populations investigated appeared to share the same isolate of <em>H. contortusem> while different isolates may be found in Yemen which must be taken into account in the design of an effective control strategy. Analysis of the internal transcribed spacer-2 (ITS-2) confirmed that all samples investigated in this study belonged to <em>H. contortus.em> However presence of other <em>Haemonchusem> species parasitizing these two hosts can only be confirmed by further detailed studies.