Results 141 to 150 of about 4,733 (182)

Carbohydrate epitopes on Haemonchus contortus antigens

Parasitology Research, 1996
Extracts of infective larvae and adults of the trichostrongylid Haemonchus contortus were studied for the presence of carbohydrate moieties. Several different lectin-binding sites were demonstrated in both stages using a panel of nine lectins. The carbohydrate specificity of the lectins used strongly suggests that alpha-D-mannose, alpha-D-glucose, and ...
Schallig, H. D., van Leeuwen, M. A.
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Haemonchus contortus resistance to monepantel in sheep

Veterinary Parasitology, 2015
In a sheep farm in the Netherlands with a suspected Haemonchus contortus resistance to monepantel (Zolvix®, Novartis Animal Health), a fecal egg count reduction test was carried out in two groups of lambs, according to the method of the World Association for the Advancement of Veterinary Parasitology.
R, Van den Brom, L, Moll, C, Kappert, P, Vellema   +3 more
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Detection of resistance to ivermectin in haemonchus contortus

International Journal for Parasitology, 1991
Infective, third-stage (L3) larvae of Haemonchus contortus isolates resistant to ivermectin (IVM) show a decreased sensitivity to IVM-induced paralysis in vitro. The inhibition of larval motility by IVM can be detected in L3 larvae incubated in the dark on an agar matrix containing IVM, by the failure of affected larvae to move when stimulated by ...
J H, Gill, J M, Redwin, J A, van Wyk, E, Lacey   +3 more
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Development of a vaccine against haemonchus contortus

Parasitology Today, 1993
Haemonchus contortus is an economically important nematode parasite of sheep and the occurrence worldwide of strains resistant to anthelmintic chemicals has emphasized the need to develop a vaccine against it. Here, Ed Munn describes the approach to this problem adopted in his laboratory.
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Extracellular Matrix Degradation by Haemonchus contortus

The Journal of Parasitology, 1996
To better understand the in vivo function of secreted cysteine proteases of Haemonchus contortus, the ability of live parasites to degrade connective tissue was investigated using [3H]proline-labeled extracellular matrix produced by smooth-muscle cells (R22).
M L, Rhoads, R H, Fetterer
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Haemonchus contortus: The uptake and metabolism of closantel

International Journal for Parasitology, 1997
Closantel is an anthelmintic which associates with plasma albumin and is useful for the control of sheep parasites, such as Haemonchus contortus, that ingest blood. However, the utility of closantel for parasite control has been threatened by the emergence of resistance. The mechanisms of resistance are unknown.
Rothwell, J. T., Sangster, N.
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Haemonchus contortus: Food of preinfective larvae

Experimental Parasitology, 1971
Abstract Haemonchus contortus eggs were bacterially sterilized and cultivated in three different preparations of Escherichia coli cultures and a nutrient broth at 30 C for 7 days. The following percentages of infective larvae were recovered: supernatant fluid from E. coli culture, 0%; washed E. coli , 71%; heat-killed E.
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Hypergastrinaemia of sheep infected with Haemonchus contortus

Research in Veterinary Science, 1988
Radioimmunoassay of plasma gastrin has shown that a hypergastrinaemia occurs in yearling sheep, after infection with 10(6) infective third stage larvae of Haemonchus contortus. Plasma gastrin concentrations began to rise two to four days after infection, that is, at about the same time as, or slightly before, the abomasal pH was observed to increase.
C D, Nicholls, D L, Lee, T E, Adrian, S R, Bloom, A D, Care   +4 more
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The establishment and development of Haemonchus contortus in goats

Veterinary Parasitology, 1990
Twelve goats were inoculated with 40,000 third-stage Haemonchus contortus larvae and two were killed on each of Days 4, 7, 11, 14, 18 and 21 after inoculation (DAI). The number of worms that established, and the site of development were recorded. More worms established in the fundic, than in the middle or pyloric thirds of the abomasum.
W A, Rahman, G H, Collins
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Haemonchus contortus microtubules are cold resistant

Molecular and Biochemical Parasitology, 2014
Haemonchus contortus is an important nematode of livestock that is present in most parts of the world. The life cycle comprises free living stages (egg, L1, L2 and L3 larvae), and parasitic stages (L4, adult and egg) in a ruminant. Microtubules are filamentous structures which are made from polymerization of α- and β-tubulin. In vitro polymerization of
Shoaib Ashraf, Roger K. Prichard
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