@conference {40211,
	title = {Induction oestrus in the ovariectomised red deer with exogenous progesterone and oestradiol benzoate},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {50},
	year = {1990},
	month = {Jan},
	pages = {155-160},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Preventive control programmes for nematode infections of sheep,   which depend upon strategically timed treatments of anthelmintics, are   based on epidemiological knowledge of the time relationships between   contamination of pastures and seasonal availability of infective larvae   in different climatic regions.     In Australia by the time these programmes were being actively promoted   resistance to two of the three families of anthelmintic drugs had   already emerged. A high prevalence of resistance is now widespread in   Australia and measures for the management of resistance have been   incorporated into recommendations of worm control. These include, a   reduction in frequency of treatments, elimination of underdosing,   assessment of effective drugs, their use at high dose rates in an annual   rotation and the integration of treatment with grazing management.   Nevertheless, there is concern that preventive control programmes may   not be sustainable over the long term.     Increased attention is now directed to alternative means of control,   such as vaccination of sheep against nematode infections and breeding   sheep with enhanced resistance to infection. The integration of these   measures into preventive control programmes and the extent to which they   can replace chemotherapy are topics for ongoing study.    },
	issn = {1176-5283},
	author = {Meikle LM and Fisher MW}
}
