Results 131 to 140 of about 4,792 (182)
Some of the next articles are maybe not open access.
Immunity to Haemonchus contortus and Vaccine Development
2016Sheep are capable of developing protective immunity to Haemonchus contortus through repeated exposure to this parasite, although this immune protection is the result of a complex interaction among age, gender, physiological status, pregnancy, lactation, nutrition and innate and adaptive immunity in the host animal.
Nisbet, A. J. +3 more
openaire +3 more sources
Inheritance of Cambendazole Resistance in Haemonchus contortus
American Journal of Veterinary Research, 1981SUMMARY Fourth-molt larvae (M4) of cambendazole-resistant (CBZ-R) and cambendazole-susceptible (BPL) strains of Haemonchus contortus were recovered from donor lambs and inoculated orally into source lambs to effect mating in a 2nd lamb. Eggs produced by these parasitic matings were collected, cultured, and inoculated into lambs to compare the ...
H, Herlich, R S, Rew, M L, Colglazier
openaire +2 more sources
Haemonchus contortus: Cloning and characterization of serpin
Experimental Parasitology, 2010The 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 +3 more
openaire +2 more sources
Localisation of serotonin and dopamine in Haemonchus contortus
International Journal for Parasitology, 2011Serotonin 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 +3 more
openaire +2 more sources
Carbohydrate epitopes on Haemonchus contortus antigens
Parasitology Research, 1996Extracts 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.
openaire +3 more sources
Haemonchus contortus resistance to monepantel in sheep
Veterinary Parasitology, 2015In 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 +3 more
openaire +2 more sources
Detection of resistance to ivermectin in haemonchus contortus
International Journal for Parasitology, 1991Infective, 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 +3 more
openaire +2 more sources
Haemonchus contortus: The uptake and metabolism of closantel
International Journal for Parasitology, 1997Closantel 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.
openaire +5 more sources
Hypergastrinaemia of sheep infected with Haemonchus contortus
Research in Veterinary Science, 1988Radioimmunoassay 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 +4 more
openaire +2 more sources
Development of a vaccine against haemonchus contortus
Parasitology Today, 1993Haemonchus 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.
openaire +2 more sources