The three major groups of anthelmintics are all effective against lungworm. These can be used in conjunctionwithapasturemanagement programme to prevent clinical disease due to lungworm. Grazing strategies to reduce the risk of lungworm in young weaned cattle include: • Turn young weaned cattle out onto pasture on which there were no cattle the previous year • If this is not possible, turn young stock out onto pasture grazed by adult cattle the previous year • Turn young stock out as one group • If turnout is staggered, the later group should be turned out onto another low risk pasture rather than following previous groups. Anthelmintics can also be used therapeutically in the face of an outbreak. If coughing is detected in a group of cattle at grass and hoose is suspected, all cattle in the group should be dosed. Cattle should be moved to a ‘clean’ pasture, or an anthelmintic with persistent action may be used to prevent re- infection. A live lungworm vaccine is now available in Ireland and can provide good protection against hoose. It is necessary to complete the vaccination schedule prior to turnout. It may also be suitable for housed autumn born calves, not turned out until the following spring. Vaccination of second season grazing animals or adult cows before turnout could be indicated if hoose has affected older animals. Control strategies for lungworm should be discussed with the farm veterinary practitioner. Further information on lungworm is available in the AHI leaflet ‘Lungworm-the facts’ [Click here] .
SUMMER EDITION 2016
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