Results 161 to 170 of about 10,812 (191)
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Genetic control of immunity to gastrointestinal nematodes of cattle
Veterinary Parasitology, 1990Previous studies have indicated that host genetics significantly affects the number of gastrointestinal nematode eggs per gram (epg) in the feces of calves during their first grazing season. An entire calf crop of approximately 190 animals was monitored monthly until weaning to verify these earlier results, and to begin to discern the basis for this ...
L C, Gasbarre +2 more
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Immunodiagnosis of gastrointestinal nematode infections
2000Thesis (Ph.D.) -- La Trobe University, 2000.; Submitted to the Dept. of Agricultural Sciences, School Life Sciences, Faculty of Science, Technology and Engineering.
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Age Resistance of Cattle to Nematodes of the Gastrointestinal Tract
The Journal of Parasitology, 1960The literature is replete with references to a greater resistance in older animals than in younger ones against the establishment of nematode parasites. Experimental data confirming the existence of age resistance have been presented for a variety of nematode host systems: viz, Ancylostoma braziliense in cats and dogs (Sarles, 1929) ; Nippostrongylus ...
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Effect of lactation on the immune response to gastrointestinal nematodes
Veterinary Record, 1976The immune expulsion of gastrointestinal nematodes is impaired during lactation by the inhibition of the lymphocyte mediated component. As a result the population of worms may increase. At the same time, the fecundity of female worms in previously immune hosts may increase to approach that of worms in fully susceptible animals.
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Gastrointestinal nematodes: the Karkar experience.
Papua and New Guinea medical journal, 1998This paper reviews our research on the hookworm Necator americanus over several years. Our field site for the research was on Karkar Island, Papua New Guinea, where we found a prevalence of N. americanus infection among adults of nearly 100%. The intensity of infection was related to host age and to the development of iron deficiency anaemia, which ...
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Control of gastrointestinal nematodes in Australia in the 21st century
Veterinary Parasitology, 1993Because the Australian livestock industries rely overwhelmingly on year-round grazing of pastures, nematode parasites are of major concern. Nematode parasitism is recognized as the cause of the most economically important diseases of sheep, while in cattle, the relative importance of nematode parasitism will probably increase following the eradication ...
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[Biology of gastrointestinal nematodes of ruminants].
Parassitologia, 2007The development and survival of free-living stages of gastro-intestinal nematodes of small ruminants are influenced by several abiotic and biotic factors. Within the abiotic factors, most important are the environmental temperature and humidity. They regulate the development of larvae from eggs dispersed on the pasture by the animals faeces.
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In vitro anthelmintic evaluation of three alkaloids against gastrointestinal nematodes of goats
Veterinary Parasitology, 2021Gisele Dias da Silva +2 more
exaly
Avermectin-resistance in gastrointestinal nematodes of Boer goats and Dorper sheep in Switzerland
Veterinary Parasitology, 2007L Kohler +2 more
exaly