Results 171 to 180 of about 11,878 (215)

Resistance of Haemonchus contortus to thiophanate

Research in Veterinary Science, 1980
The occurrence of a field strain of Haemonchus contortus which was resistant to thiophanate and susceptible to thiabendazole and levamisole is reported. The LD95 of thiophanate for the strain was found to be 156.1 mg/kg and its resistance factor was 6.7.
J R, Edwards, G, De Chaneet
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Immune response to Haemonchus contortus and Haemonchus placei in sheep and its role on parasite specificity

Veterinary Parasitology, 2014
Two trials were conducted to determine the prepatent and the patent period of Haemonchus contortus and Haemonchus placei in Santa Ines crossbred sheep and to determine whether serial infections with both species confer protection against homologous or heterologous challenge. To evaluate the prepatent and patent periods of infection, five lambs received
Santos, Michelle C., Xavier, Jorge K., Amarante, Monica R. V., Bassetto, Cesar C., Amarante, Alessandro F. T.   +4 more
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Pyruvate kinase in Haemonchus contortus larvae

Comparative Biochemistry and Physiology, 1968
Abstract 1. 1. By using an indirect assay procedure, pyruvate kinase was detected in Haemonchus contortus extracts. 2. 2. The level of activity detected in H. contortus was considerably lower than that detected in rat liver and the significance of these findings in relation to fermentative metabolism in parasites is discussed.
C W, Ward, P J, Schofield, I L, Johnstone   +2 more
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Development and Survival of Haemonchus contortus on Pasture

American Journal of Veterinary Research, 1974
SUMMARY A study was made of the development and the survival of Haemonchus contortus eggs and larvae on a bluegrass pasture at Urbana, IL, during 1967–1969. A total of 296 experiments was done. In 148, unembryonated eggs in fresh sheep fecal pellets were placed on the pasture, and vegetation, pellets, and soil were examined periodically for infective ...
N D, Levine, K S, Todd, P A, Boatman
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Haemonchus contortus: Cloning and characterization of serpin

Experimental Parasitology, 2010
The serpin gene of Haemonchus contortus (hc-serpin) was cloned and characterized in this study. Specific primers for rapid amplification cDNA ends (RACE) were designed based on the expression sequence tag (EST, BM173953) to amplify the 3'- and 5'-ends of hc-serpin. The full length of the cDNA of this gene was obtained by overlapping the sequences of 3'-
Daosheng, Yi, Lixin, Xu, Ruofeng, Yan, Xiangrui, Li   +3 more
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Localisation of serotonin and dopamine in Haemonchus contortus

International Journal for Parasitology, 2011
Serotonin and dopamine play important roles in the biology of nematodes where they exert their effect on feeding, locomotion and reproductive behavior. Haemonchus contortus, a parasitic nematode which infects small ruminants, is responsible for considerable economic losses in agriculture.
Vijayaraghava T S, Rao, Sean G, Forrester, Kathy, Keller, Roger K, Prichard   +3 more
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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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Factors associated with the hatchability of Haemonchus species eggs and molecular identification of Haemonchus contortus

Bangladesh Journal of Veterinary and Animal Sciences, 2019
Haemonchus species is a common parasitic nematode infecting all ruminants and causing significant economic losses in developing countries. Accurate and reliable identification of various Haemonchus species and their molecular epidemiology is essential to formulate effective control strategies against Haemonchosis.
Mannan, M. A., Siddiki, A.M.A.M.Z., Miya, M. S., Chowdhury, S, Kamal, T, Hossain, M. A   +5 more
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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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