Results 121 to 130 of about 1,258 (169)
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Cytology of Reproduction in Cooperia pedunculata
American Journal of Botany, 1953exaly +4 more sources
Establishment of Cooperia oncophora in calves
Veterinary Parasitology, 2018The establishment rate of Cooperia oncophora related to host age and previous infection was investigated in young calves. Calves of similar age were kept on a feed pad and allocated into multiple groups, based on their age and weight. Two groups (each n = 16) received trickle infections with an ivermectin-susceptible C.
Christian W. Sauermann +4 more
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Veterinary Parasitology, 2020
In Australia, Cooperia spp. are often overshadowed by parasites believed to be more pathogenic production-limiting nematodes. A rise in anthelmintic resistance and reports of reduced growth rates attributed to infection with Cooperia spp. in Europe increases the need to be able to monitor the presence of C. pectinata, C. punctata and C.
Emily Kate Francis +4 more
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In Australia, Cooperia spp. are often overshadowed by parasites believed to be more pathogenic production-limiting nematodes. A rise in anthelmintic resistance and reports of reduced growth rates attributed to infection with Cooperia spp. in Europe increases the need to be able to monitor the presence of C. pectinata, C. punctata and C.
Emily Kate Francis +4 more
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Cooperia punctata: Effect on cattle productivity?
Veterinary Parasitology, 2012Cooperia spp. have become the most prevalent parasites in United States cow/calf operations as observed in the USDA NAHMS (National Animal Health Monitoring System) Beef Cow/Calf survey in 2008. This is at least in part due to the widespread use of macrocyclic lactones that have recently been shown to have a reduced activity against these parasites ...
Bert E, Stromberg +7 more
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Studies on the pathogenicity ofCooperia curticeifor sheep
New Zealand Veterinary Journal, 1975Abstract Extract Cooperia curticei is commonly found in sheep in New Zealand, frequently in relatively large numbers. The pathogenicity of this nematode, for sheep has been the subject of few experimental studies; the evidence available suggests that C. curticei produces few pathological changes in sheep (Andrews, 1938), although it has been claimed to
J S, Ahluwalia, W A, Charleston
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Completion of the Life Cycle of Cooperia punctata In vitro
The Journal of Parasitology, 1971L3 Cooperia punctata were cultivated in vitro to adult worms that laid large numbers of eggs; many of these eggs hatched to L1 and L2 and a few of the latter developed to L.. Parasitic stages were cultivated in Ae medium (38.5 C); free-living stages were cultivated in A-s medium at 27 C.
G L, Zimmerman, S E, Leland
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Resistance of Cooperia curticei against fenbendazole
Research in Veterinary Science, 1986Resistance of Cooperia curticei against fenbendazole was demonstrated in The Netherlands. Experimental infection of lambs followed by intraruminal injection of 5 mg kg-1 showed a 100 per cent survival of the C curticei population. With an in vitro egg development assay LC50 values between 0.23 and 0.38 micrograms ml-1 thiabendazole were found.
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Exsheathment of infective larvae ofCooperia curticei
New Zealand Veterinary Journal, 1974Abstract Extract Although exsheathment of the infective larvae of many strongylate nematode parasites of ruminants has been studied (Rogers, 1966), that of Cooperia curticei larvae has not. By analogy with other trichostrongylid species inhabiting the small intestine, they would be expected to exsheath in response to conditions provided by the abomasum,
J S, Ahluwalia, W A, Charleston
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Transactions of the Kansas Academy of Science (1903-), 1937
Mr. B. H Hill of Neodesha, Kan., last summer took us to see a colony of Cooperias occupying a high, rocky pasture of the farm of Mr. Howard Hill, his brother, near the village of La Fontaine. Indeed, he gave us two introductions to this colony in its two very strikingly different aspects: First, in May, when the Cooperias appeared above the ground each
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Mr. B. H Hill of Neodesha, Kan., last summer took us to see a colony of Cooperias occupying a high, rocky pasture of the farm of Mr. Howard Hill, his brother, near the village of La Fontaine. Indeed, he gave us two introductions to this colony in its two very strikingly different aspects: First, in May, when the Cooperias appeared above the ground each
openaire +1 more source