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Abstract

Four calves were given 50 000, 150 000, 200 000 or 300 000 infective larvae by mouth; 2 calves were not inoculated. From 46 days later all 6 calves were given 470 000 infective larvae over 63 days in increasing doses (1000-50 000 larvae 3 times each week) and examined PM on day 122, 13 days after...

Author(s)
Snider, T. G.; Williams, J. C.; Sheehan, D. S.; Fuselier, R. H.
Citation
Veterinary Parasitology, 8, 2, pp 173-183
Abstract

In all of 6 calves injected intravenously with 85,000 to 165,000 Ostertagia ostertagi infective larvae the infection became patent within 17 to 21 days. In none of 4 calves inoculated subcutaneously or intraperitoneally with 85,000 larvae did the infection reach patency. Oral challenge of those...

Author(s)
Williams, J. C.; Roberts, E. D.; Todd, J. M.
Citation
International Journal for Parasitology, 1974, 4, 1, pp 55-61
Abstract

In a series of experiments young goats and calves were experimentally infected with O. ostertagi L3 from calf and goat-passaged isolates. Patent infections were established in 73 out of 86 inoculated goats. The largest number of patent infection was observed when inoculation consisted of a single...

Author(s)
Williams, J. C.
Citation
Veterinary Parasitology, 1987, 23, 1/2, pp 51-67
Abstract

The epidemiology of O. ostertagi and other gastrointestinal nematodes in yearling beef cattle was examined in each of 2 successive years. During each year 50 head of newly weaned beef calves were each given a single dose of thiabendazole and then placed on experimental pastures. 24 of the animals...

Author(s)
Williams, J. C.; Knox, J. W.; Marbury, K. S.; Kimball, M. D.; Baumann, B. A.; Snider, T. G.
Citation
Parasitology, 1987, 95, 1, pp 135-153
Abstract

The anthelmintic efficacy of ivermectin (IVM) delivered from a sustained-release (SR) bolus was evaluated against natural infections with gastrointestinal tract nematodes in 12 crossbred beef heifers in spring in Louisiana, USA. The 12 calves were randomly allotted to 2 groups of 6 calves each....

Author(s)
Williams, J. C.; Plue, R. E.
Citation
American Journal of Veterinary Research, 1992, 53, 5, pp 793-795
Abstract

Persistent anthelmintic efficacies of topical formulations (all at a dosage of 500 µg/kg) of doramectin (DOR, Dectomax), ivermectin (IVM, Ivomec), eprinomectin (EPR, Eprinex) and moxidectin (MOX, Cydectin), in comparison with untreated control cattle (CONT), were studied in stocker beef calves...

Author(s)
Williams, J. C.; Loyacano, A. F.; DeRosa, A.; Gurie, J.; Clymer, B. C.; Guerino, F.
Citation
Veterinary Parasitology, 1999, 85, 4, pp 277-288
Abstract

The effectiveness, safety and production-enhancing benefit (improved weight gains) of moxidectin long-acting injection given subcutaneously in the ear at the rates of 0.75, 1.0 and 1.5 mg/kg bw were evaluated in three studies under common protocol. The only adverse reaction to treatment was a mild...

Author(s)
Yazwinski, T. A.; Williams, J. C.; Smith, L. L.; Tucker, C.; Loyacano, A. F.; DeRosa, A.; Peterson, P.; Bruer, D. J.; Delay, R. L.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Veterinary Parasitology, 2006, 137, 3/4, pp 273-285

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