Results 141 to 150 of about 10,812 (191)

Gastrointestinal Nematode Immunization Trials in Cattle

American Journal of Veterinary Research, 1979
SUMMARY Three experiments were conducted to immunize calves against Ostertagia ostertagi, Trichostrongylus axei, and T colubriformis. Calves were given intraperitoneal injections with in vitro-grown parasitic larvae of the three species and iv and intraperitoneal injections of exoantigens obtained from culture media used to grow O ostertagi.
H, Herlich, F W, Douvres
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Antigens of gastrointestinal nematodes

Transactions of the Royal Society of Tropical Medicine and Hygiene, 1986
Nematodes occupying the gastrointestinal (GI) tract of man shed an as yet undefined array of chemicals into their environment. To combat effectively the potentially debilitating disease caused by infection with these organisms we must (a) define the parasite products chemically, (b) determine their ability to induce protective immunity (or to counter a
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Incidence of Gastrointestinal Nematodes in Kansas Cattle

American Journal of Veterinary Research, 1973
SUMMARY A survey of bovine gastrointestinal nematodes was conducted during 1969 to 1971 on herds totalling more than 10,000 cattle of which 10% were individually sampled. On the basis of egg counts and differentiation, cultured infective larvae, and cultivation of parasitic stages, the following results were obtained: Of 1,032 fecal samples 67.3% were ...
S E, Leland, H K, Caley, R K, Ridley
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Gastrointestinal Nematodes, Diagnosis and Control

Veterinary Clinics of North America: Food Animal Practice, 2018
Disease caused by nematodes in the gastrointestinal tract of cattle is primarily economic and the effect of treatment is cattle grow larger faster because of increased feed intake. The disease, control measures, and drugs used must be focused on different ages and environments.
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Acetylcholinesterases of Gastrointestinal Nematodes

2000
Vertebrate cholinesterases (ChEs) are broadly classified into two families based on their substrate specificity. Acetylcholinesterases (AChEs) terminate transmission of neuronal impulses by rapid hydrolysis of acetylcholine (ACh), and are therefore primarily associated with synaptic contacts in nerves and muscle (Fig. 1).
Murray E. Selkirk, Ayman S. Hussein
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The Effect of Gastrointestinal Nematodes on Metabolism in Calves

1987
The results of metabolic studies on calves infected with gastrointestinal nematodes are critically reviewed with some reference to work carried out in sheep. Special attention is given to feed intake, energy and nitrogen utilization. Impairment of all these processes may be contributing factors in the poor performance of parasitized animals.
Kloosterman, A., Henken, A.M.
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Efficacy of Albendazole Against Gastrointestinal Nematodes of Cattle

American Journal of Veterinary Research, 1976
SUMMARY Forty-five calves with artificial and pasture-acquired nematode infections were medicated with albendazole at dose levels of 0, 2.5, 5.0, or 10 mg/kg of body weight. A dose level of 2.5 mg/kg removed at least 99% of adult Trichostrongylus axei, Trichostrongylus colubriformis, Cooperia oncophora, and Bunostomum phlebotomum. Burdens of Haemonchus
V J, Theodorides, T, Nawalinski, J F, Freeman, J R, Murphy   +3 more
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The efficacy of febantel on gastrointestinal nematodes in sheep

Research in Veterinary Science, 1978
Febantel (Bay h 5757, Rintal) is a broad-spectrum anthelmintic of a new type. A single oral dose of 5 mg/kg is fully effective against larval and adult stages of Haemonchus contortus, Trichostrongylus colubriformis, Oesophagostomum columbianum, Ostertagia circumcincta and Bunostomum trigonocephalum in sheep.
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Immunological control of gastrointestinal nematode infections

Veterinary Parasitology, 1997
Control of nematode parasitism by an active manipulation of the host immune response has been a goal of veterinary and medical parasitologists for decades. The reality of achieving this goal has been questioned vigorously and demonstrations of the feasibility of using immunological control under field conditions are minimal.
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The immunobiology of gastrointestinal nematode infections in ruminants

2000
The major gastrointestinal nematode parasites of ruminants all belong to the Order Strongylida and the family Trichostrongyloidea. Despite this close evolutionary relationship, distinct differences exist in the microenvironmental niches occupied by the developmental stages of the various parasites, which may account for the variable susceptibility of ...
A, Balic, V M, Bowles, E N, Meeusen
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