The Use of Anthelmintic Given at Continuous Low Dosage in Drinking Water to Control Nematodiasis in Calves
A number of anthelmintic compounds were found to suppress the faecal output of trichostrongylid eggs or Dictyocaulus viviparus larvae or both when administered at various low dosage levels via the drinking water to artificially infected calves maintained indoors. Under grazing conditions, morantel, levamisole and oxfendazole administered in this fashion to calves during May, June and early July suppressed egg output and this was reflected later in greatly reduced levels of infection on the herbage and in the calves. Calves receiving this system of parasite control achieved excellent liveweight gains. From clinical observations and liveweight data, animals that had undergone the treatment as calves in their first grazing season did not seem to be unduly susceptible to trichostrongylid infection in their second grazing season. Preliminary studies showed that the anthelmintics thiophanate and phenothiazine, administered in the drinking water at low daily dosage, had marked ovicidal and possibly larvicidal effects.
KeywordsDrinking Water Grazing Season Parasite Control Grazing Experiment Faecal Output
Unable to display preview. Download preview PDF.
- Bürger, H.-J., 1974. Epidemiology and control of trichostrongyle infections in cattle. Proceedings of IIIrd International Congress of Parasitology, Munich. Vol. 2, p. 744–746.Google Scholar
- Downey, N.E., O’Shea, J. and Spillane, T.A., 1974. Preliminary observations on the use of low-level medication in calves’ drinking water as a means of parasite control. Irish Veterinary Journal, 28, 221–222.Google Scholar
- Downey, N.E. and O’Shea, J., 1978. The control of nematode parasites in calves through low-level anthelmintic in the drinking water. Proc. IVth International Congress of Parasitology, Warsaw. Section C. p. 170–171.Google Scholar
- Parfitt, J.W., 1955. Two techniques used for the detection and enumeration of the larvae of Dictyocaulus viviparus in faeces and herbage. Laboratory Practice, 4, 15–16.Google Scholar
- Parfitt, J.W., 1958. A technique for the enumeration of helminth eggs and protozoan cysts from farm animals in Britain. Laboratory Practice, 7, 353–355.Google Scholar
- Shum, K.L., 1976. The impact of prophylactic chemicals on trichostrongylid parasitism in sheep. Ph.D. Thesis, University of Wisconsin-Madison.Google Scholar