Haemonchus placei is an abomasal parasite of cattle, primarily in tropical and subtropical areas of the world. In Australia, this nematode can be extremely pathogenic in summer rainfall areas, particularly in the hot, sub-tropical Kimberley region, in the far north of the state of Western Australia WA. Although cattle are occasionally transferred to southern parts of WA, it was believed that H. Here, we show that, although H. While investigating the prevalence of anthelmintic resistance in nematodes of cattle in WA, the existence of H.
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Giudici 1 , J. Durette-Desset 2. E-mail: cabaret tours. Received: 25 August Accepted: 23 September Haemonchus placei in cattle has never been completely described, possibly due to great morphological similarity with small ruminants Haemonchus contortus.
It is newly described on one isolate from Atgentina. It has cleat distinct morphological features from sheep and goats Haemonchus contortus and presents only two female morphotypes linguiform and knobbed instead of three recorded in H.
A key is proposed to identify females. We propose to differentiate three sub-species, H. Data correspond to usage on the plateform after The current usage metrics is available hours after online publication and is updated daily on week days.
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Differentiation of Haemonchus placei from Haemonchus contortus by PCR and by morphometrics of adult parasites and third stage larvae. Molecular and morphological methods were evaluated to distinguish between Haemonchus contortus and Haemonchus placei species. A total of H. These PCR results were used as gold standard for Haemonchus spp. Haemonchus placei presented higher mean spicule and barb lengths than H. However, some measurements overlapped. For this reason, a discriminate function did not allow the correct identification of 13 H.
Unexpected Occurrence of Haemonchus Placei in Cattle in Southern Western Australia
What is a nematode? Nematodes, also called roundworms, are worm-shaped animals. They are not the same as earthworms, which are segmented. Nematodes are non-segmented. There are 28, described species of nematode, most of them less than 1 cm in length.