Results 171 to 180 of about 14,790 (212)
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International Journal for Parasitology, 1981
Abstract There were distinct ecotypie differences in the ability to develop to third stage larvae at a constant 11 or 13°C for two weeks. H. conforms cayugensis could develop at both 11 and 13°C; H. contortus from Louisiana could develop at 13°C but not 11°C and H. placei could not complete development at either temperature.
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Abstract There were distinct ecotypie differences in the ability to develop to third stage larvae at a constant 11 or 13°C for two weeks. H. conforms cayugensis could develop at both 11 and 13°C; H. contortus from Louisiana could develop at 13°C but not 11°C and H. placei could not complete development at either temperature.
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Resistance of Haemonchus contortus to thiophanate
Research in Veterinary Science, 1980The 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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Veterinary parasitology, 2018
Haemonchus contortus is an economic problem in sheep farms worldwide, mainly in the tropics and subtropics. A vaccine against haemonchosis, called Barbervax®, was evaluated in ewes under two nutritional status, naturally infected with gastrointestinal ...
C. C. Bassetto +7 more
semanticscholar +1 more source
Haemonchus contortus is an economic problem in sheep farms worldwide, mainly in the tropics and subtropics. A vaccine against haemonchosis, called Barbervax®, was evaluated in ewes under two nutritional status, naturally infected with gastrointestinal ...
C. C. Bassetto +7 more
semanticscholar +1 more source
Ovicidal and larvicidal activity of extracts from medicinal-plants against Haemonchus contortus.
Experimental parasitology, 2018The use of medicinal plants (MP) containing bioactive compounds is an alternative strategy to control of parasitic nematode of small ruminants Haemonchus contortus at various stages of their life cycle.
Z. Váradyová +8 more
semanticscholar +1 more source
International Journal for Parasitology, 2014
A vaccine containing integral membrane glycoproteins from the intestine of Haemonchus contortus was evaluated in three groups of eight 5 months old grazing calves, naturally infected by Haemonchus similis, Haemonchus placei and other gastrointestinal nematodes.
Bassetto, C. C. +6 more
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A vaccine containing integral membrane glycoproteins from the intestine of Haemonchus contortus was evaluated in three groups of eight 5 months old grazing calves, naturally infected by Haemonchus similis, Haemonchus placei and other gastrointestinal nematodes.
Bassetto, C. C. +6 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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Veterinary Parasitology: Regional Studies and Reports, 2018
Anthelmintic resistance was explored by fecal egg count reduction test in a sheep flock from the French Pyrenees at the request of the veterinary practitioner after a poor response to anthelmintics was noted. The FECRT confirmed the suspicion with a mean
T. Cazajous +8 more
semanticscholar +1 more source
Anthelmintic resistance was explored by fecal egg count reduction test in a sheep flock from the French Pyrenees at the request of the veterinary practitioner after a poor response to anthelmintics was noted. The FECRT confirmed the suspicion with a mean
T. Cazajous +8 more
semanticscholar +1 more source
Pre-mating barriers in hybrid Haemonchus
International Journal for Parasitology, 1983Abstract The F 1 (HX 1 ) from the mating of female Haemonchus placei (Hp) × male Haemonchus contortus (Hc) and the F 2 (HX 2 ) from the reciprocal mating, male Hp × female Hc, consist of sterile males and semi-sterile females. Infections in sheep of HX 2 established from 5000 larvae were found to exclude 90% of a subsequent H.
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Haemonchus contortus: Food of preinfective larvae
Experimental Parasitology, 1971Abstract 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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