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VetMed Resource

Veterinary information to support practice, based on evidence and continuing education

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Abstract

Faeces containing ova were placed on 4-foot-square plots once each month for two years. Observations included: length of survival, lateral and vertical distribution of larvae on grass, and the effect of different faecal application methods. Faeces were placed as large (4, 200 g.) or as small (2,...

Author(s)
Williams, J. C.
Citation
Journal of Parasitology, 1965, 51, pp 53 p
Abstract

The effect of form of faeces (whether in compact pads, or scattered) on survival of infective larvae was negligible. The longest survival of larvae was observed on plots contaminated with faeces in Oct., Nov. and Dec. Larvae were recovered for as long as eight months (Oct. to May), but average...

Author(s)
Williams, J. C.; Bilkovich, F. R.
Citation
Journal of Parasitology, 1971, 57, pp 327-338
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 Louisiana, USA, post-mortem worm counts on the abomasa of 7 yearling beef steers in early February (1977) revealed from 5,000 to 20,000 Ostertagia ostertagi/steer of which 13.7 to 51.6% (average 36.2%) were inhibited (early 4th-stage) larvae. In controlled tests at the end of February...

Author(s)
Williams, J. C.; Knox, J. W.; Sheehan, D.; Fuselier, R. H.
Citation
Veterinary Record, 1977, 101, 24, pp 484-486
Abstract

The efficacy of albendazole in removing gastrointestinal nematodes and tapeworms was studied in 16 treated and 16 untreated (control) beef calves. It was administered as an oral drench at 5 ml/45.5 kg of body weight (5 mg/kg). Percentage of efficacy against the various genera was: Trichostrongylus...

Author(s)
Williams, J. C.; Sheehan, D.; Fuselier, R. H.
Citation
American Journal of Veterinary Research, 1977, 38, 12, pp 2037-2038
Abstract

Oxibendazole was given to 12 cattle naturally infected with gastro-intestinal helminths as a feed premix (mixed with 0.45 kg of a commercial ration) at a single dosage of 15 mg/kg. The treated and 12 control cattle were slaughtered 7 days after treatment. Based on the numbers of worms recovered the ...

Author(s)
Williams, J. C.; Sheehan, D.; Fuselier, R.
Citation
Proceedings of the Helminthological Society of Washington, 1978, 45, 1, pp 129-131
Abstract

In northwest Louisiana, USA, beginning in November 1977 two or 3 cattle were removed each month from a grazing herd and examined post-mortem to find out when inhibited 4th-stage larvae of Ostertagia ostertagi were most numerous. Peak worm populations (50 000 to 100 000/animal) were discovered in...

Author(s)
Williams, J. C.; Knox, J. W.; Sheehan, D. S.; Fuselier, R. H.
Citation
American Journal of Veterinary Research, 1979, 40, 8, pp 1087-1090
Abstract

Author(s)
Knox, J. W.; Williams, J. C.
Citation
Journal of Animal Science, 1979, 49, Suppl. 1, pp 193
Abstract

Albendazole, as a paste formulation, was evaluated for its efficacy against inhibited early fourth stage larvae of Ostertagia ostertagi in naturally infected, yearling beef cattle in April. The mean number of inhibited larvae in 11 untreated control cattle was 107,166. At the dosage level of 7.5 mg ...

Author(s)
Williams, J. C.; Knox, J. W.; Sheehan, D.; Fuselier, R. H.
Citation
Veterinary Record, 1979, 105, 5, pp 98-100
Abstract

Forty calves naturally infected with O. ostertagi were treated with albendazole or fenbendazole. PM examination after 7-9 days revealed that 80% of fourth stage larvae in the abomasum were dead after treatment with 15 mg/kg fenbendazole and slightly less with 10 mg/kg and with albendazole...

Author(s)
Snider, T. G.; Williams, J. C.
Citation
Veterinary Record, 1980, 106, 2, pp 34

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