Monitoring Pasture Infectivity and Pasture Contamination with Infective Stages of Dictyocaulus viviparus
The technique for the estimation of pasture larval contamination by the examination of herbage is presented. Samples are taken near to faecal pats where the larvae are expected to be concentrated; a second sample taken at least 100 cm from the faecal pat provides information on the horizontal distribution of the pasture contamination.
The bile-agar technique for herbage samples is compared with results obtained with tracer calves. It is concluded that the two parameters are not directly comparable, nevertheless they both provide useful information on the presence of infective stages in the pasture.
KeywordsInfective Stage Pasture Infectivity Grazing Season Herbage Sample Cement Mixer
Unable to display preview. Download preview PDF.
- Iskander, A.R. and Jørgensen, R.J., 1980. Identification of infective Dictyocaulus viviparus larvae isolated from herbage by the bile-agar technique. Acta vet. Scand. 21 (in press)Google Scholar
- Jørgensen, R.J., 1980a. Recent Danish studies on the epidemiology of bovine parasitic bronchitis. Proceedings of a CEC Workshop meeting on ‘The epidemiology and control of nematodiasis in cattle’, Copenhagen, 4th to 6th February, 1980 (in press).Google Scholar
- Jørgensen, R.J., 1980c. An experimental study on the epidemiology and prevention of naturally acquired verminous bronchitis. Acta vet. Scand. (In press).Google Scholar
- Michel, J.F., 1969. Experiments on the loss of Dictyocaulus filaria from the lungs of infected sheep. V. Some general conclusions. Folia Parasitologica (Praha) 16, 361–363.Google Scholar