Results 151 to 160 of about 4,733 (182)
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The mechanism of hatching of eggs of Haemonchus contortus
International Journal for Parasitology, 1977Abstract Fluid collected from hatching eggs of Haemonchus contortus contained a lipase which hydrolysed 2-naphthyl laurate (about 0·7 μmol naphthol freed /h/10 6 eggs). The fluid also hydrolysed l -leucinamide (about 2·3 μmol leucine freed/h/10 6 eggs). The fluid when added to normal or heated eggs caused ‘hatching’.
W P, Rogers, F, Brooks
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Levamisole binding sites in Haemonchus contortus
International Journal for Parasitology, 1998Larval and adult extracts from isolates of Haemonchus contortus were assayed for specific [3H]levamisole binding activity. All of the tissue preparations displayed [3H]levamisole binding sites. The sensitive isolate SE and resistant isolate RJ showed no differences in larval and adult binding data. Larval SE extracts had higher receptor density (Bmax =
M J, Moreno-Guzmán +5 more
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Inheritance of avermectin resistance in Haemonchus contortus
International Journal for Parasitology, 2000A larval development assay was used to compare the responses of the Chiswick Avermectin Resistant (CAVRS) isolate of Haemonchus contortus, an avermectin-susceptible isolate (VRSG) and their crosses to avermectins. The F(1) and F(2) generations of reciprocal crosses between CAVRS and VRSG were denoted as CAVRS malesxVRSG females=CXV, and VRSG ...
Le Jambre, LF +3 more
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Progress on vaccination against Haemonchus contortus
International Journal for Parasitology, 1995Control of Haemonchus contortus at present is largely by the use of anthelmintics, assisted in some regions by management programs. Widespread development of resistance, particularly in South Africa and Australia, and concerns associated with the manufacture and use of chemicals have led to increasing interest in vaccination as an alternative means of ...
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A Developmentally Regulated Hyaluronidase of Haemonchus contortus
The Journal of Parasitology, 2000The trichostrongylid nematode Haemonchus contortus released a hyaluronic acid-degrading enzyme during in vitro development from the third (L3) to fourth (L4) larval stage. The enzyme did not degrade chondroitin sulfate A. Enzyme activity was optimal between pH 4.0 and 6.0, and the enzyme was inhibited by high concentrations of NaCl; the divalent ...
M L, Rhoads +2 more
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A family of galectins from Haemonchus contortus
Molecular and Biochemical Parasitology, 2000C J, Greenhalgh +4 more
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Transcriptomics and Proteomics of Haemonchus contortus in Response to Ivermectin Treatment
Animals, 2023Bintao Zhai, Xiaoye Yang
exaly