Infect Genet Evol. Jan; doi: / Epub Nov 1. Unexpected occurrence of Haemonchus placei in cattle in southern . ABSTRACT. Molecular and morphological methods were evaluated to distinguish between Haemonchus contortus and Haemonchus placei species. A total of. Haemonchus placei is a species of parasitic nematode that infects cattle. What is a nematode? Nematodes, also called roundworms, are worm-shaped animals.

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Int J Parasitol ; 38 Aust J Zool ; 1 2: Sheep fecal pellets were crumbled and put in wide-mouthed glass jars of approximately 0. Initial download of the metrics may take a while. Haemonchus placei presented higher mean spicule and barb lengths than H. Trichostrongyloidea and identification of PCR primers for rapid differentiation.

Unexpected occurrence of Haemonchus placei in cattle in southern Western Australia.

Vet Parasitol ; 4: Biological characterization and pathogenicity of three Haemonchus contortus isolates in primary infections in lambs.

June 5, ; Accepted: However, these treatments have not been very efficient due to the emergence of resistant parasitic populations. The anterior region of the worm body was transferred to a 1.

Differentiation of Haemonchus placei from H. There are 28, described species of nematode, most of them less than 1 cm in length.

J Parasitol ; 80 1: Rev Bras Parasitol Vet ; 20 4: Morphological variation between isolates of the nematode Haemonchus contortus from sheep and goat populations in Malaysia and Yemen.


It has plaeci distinct morphological features from sheep and goats Haemonchus contortus and presents only two female morphotypes linguiform and knobbed instead of three recorded in H.

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They can infect most mammals, birds, fish, reptiles, lizards and insects. The PCR reactions confirmed that the animals were infected only with H. Parasitology ; 71 3: Significant differences were found in measurements of total length and tail length.

Molecular identification by PCR and morphometrics means followed by size range in parentheses of male specimens of Haemonchus contortus and Haemonchus placei.

Haemonchus placei – WormBase ParaSite

Changes haemonchys gastro-intestinal helminth species diversity in lambs under mixed grazing on irrigated pastures in the tropics French West Indies. Parasite Immunol ; 33 7: Related Articles From isolates to a synthetic laboratory population: This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the hxemonchus work is properly cited.

In the present study, we evaluated molecular and morphological methods for distinguishing between H.

Therefore, it is important to highlight that when specimens present intermediate size with a discriminate function between 0. Identification of Haemonchus species in domestic ruminants based on morphometrics of spicules.

Molecular and morphological methods were evaluated to distinguish between Haemonchus contortus and Haemonchus placei species. When possible, larvae per fecal culture were measured. Notify me of new comments via email. Helminthologia ; 51 2: J Helminthol ; 88 haemonchhs It infers with the muscle function and nervous system of the worm — killing it.


Therefore, efforts have focused on the development of vaccines efficient against both parasites.

The adults mate harmonchus the females produce thousands of eggs every day. Introduction Haemonchus contortus and Haemonchus placei are among the most important parasites of ruminants in tropical and sub-tropical areas of the world.

Moreover, the larvae of females placie in sheep from larvae taken from cattle maintained their cattle-type and vice versa, which is in agreement with our results. Fill haemonchks your details below or click an icon to log in: Despite the laboratorial differences in the methodology used in fecal cultures to produce the third stage larvae, as well as the genetic differences in Haemonchus populations from different parts of the world, very consistent results can be observed with respect to the difference between the length of the sheath tail extension of H.