Changes

sufficient supervision should be given at lambing time to ensure adequate intakes of colostrium and the maintenance of good hygiene.

sufficient supervision should be given at lambing time to ensure adequate intakes of colostrium and the maintenance of good hygiene.

Lamb dysentery can be controlled through vaccination against clostridial diseases. Before the development of modern clostridial vaccines in the 1970s, catastrophic losses of up to 30% of the lamb crop could occur due to lamb dysentery². The vaccines used today have several components, making them effective against a variety of clostridial diseases and, for some vaccines, ''Pasteurella''. The vaccines consist of toxoids, which are inactivated forms of the toxins produced by clostridial organisms. The principles of vaccination are the same whether a clostridium-only or ''Pasteurella''-combined product is used: a sensitising dose must be given 4-6 weeks before a second confirming dose². As immunity wanes over a period of a year booster doses are required annually. Therefore, ewes should receive the primary vaccination course before entering the breeding flock and an annual booster approximated about six weeks before lambing. This timing of the booster vaccination affords passive protection to lambs until around sixteen weeks of age. Lambs born to unvaccinated ewes should themselves be vaccinated at between 3 and 12 weeks old, with a second injection given at least four weeks later.

Lamb dysentery can be controlled through vaccination against clostridial diseases. Before the development of modern clostridial vaccines in the 1970s, catastrophic losses of up to 30% of the lamb crop could occur due to lamb dysentery². The vaccines used today are effective against a variety of clostridial diseases and some vaccines are combined for effects against ''Pasteurella''. The vaccines consist of toxoids which are inactivated forms of the toxins produced by clostridial organisms. The principles of vaccination are the same whether a clostridium-only or ''Pasteurella''-combined product is used: a sensitising dose must be given 4-6 weeks before a second, confirming dose². As immunity wanes over a period of a year booster doses are required annually. Therefore, ewes should receive the primary vaccination course before entering the breeding flock and an annual booster approximately six weeks before lambing. Timing the booster vaccination in this way affords passive protection to lambs until they are around sixteen weeks of age. Lambs born to unvaccinated ewes should be vaccinated between 3 and 12 weeks old, with a second injection given at least four weeks later.

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