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Arquivos do Instituto Biológico

On-line version ISSN 1808-1657

Abstract

NASCIMENTO, Janilene de Oliveira et al. Morphometric aspects of Haemonchus contortus (Rudolphi, 1803) from goats (Capra hircus) of semiarid region of Rio Grande do Norte, Brazil. Arq. Inst. Biol. [online]. 2013, vol.80, n.4, pp.447-449. ISSN 1808-1657.  https://doi.org/10.1590/S1808-16572013000400012.

In northeastern Brazil, Haemonchus contortus is considered a gastrointestinal nematode with great veterinary relevance, causing reduced production, delayed development, economic losses and death of small ruminants. The objective of this study was to identify the morphometric variation and the types of vulvar appendages in H. contortus from goats in the semiarid region of Rio Grande do Norte. We used 100 units of H. contortus, from the collection of the Laboratory of Animal Parasitology of Federal Rural University of the Semi-Arid (UFERSA), where they were mounted between slide and coverslip with glycerin, to measure in micrometer ocular at 10X objective with correction factor of 1.3636. The body length of males was lower than females (p < 0.05), which showed, respectively, mean ± standard deviation of 13,26 ± 1,15 e 18,32 ± 1,39 μm. Regarding the type of vulvar appendage found in females, 72% were linguiforme type, 18% flat type and 10% button. These data contribute significantly to the taxonomy and differentiation of these endoparasites, especially in northeastern semi-arid region, where haemonchose has a worrisome role for raising goats.

Keywords : Capra hircus; morphometry; nematode.

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