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    Beef

    Prepare for the Threat of Coccidiosis in Spring Born Calves and Lambs

    John SwireBy John SwireMay 7, 20213 Mins Read
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    Sheep and beef producers are being encouraged to be on the lookout for coccidiosis in spring born calves and lambs as any passive immunity gained from colostrum starts to wear off.

    According to Dr Kat Baxter-Smith from MSD Animal Health, young calves and lambs are particularly susceptible to the performance damaging Eimeria parasite as they grow and develop over the late spring and early summer months.

    “Thanks to antibodies gained through ingesting colostrum early in life, calves and lambs initially acquire some passive immunity to the parasite. But this protection is short-lived, leaving young animals particularly susceptible to infection as they grow and develop as the weather warms up. In spring born calves, disease can occur at any age from three weeks to six months old and in lambs, maternal immunity wanes at four to eight weeks of age,” she says.

    Dr Baxter-Smith explains that clinical coccidiosis is caused by a build-up in the rearing environment of oocysts produced the Eimeria parasite. 

    “Susceptible growing calves and lambs become infected by ingesting these oocytes when they lick contaminated objects in their rearing environment or ingest feed or water contaminated by faeces. Once taken into the body in sufficient numbers, the oocysts hatch and the parasites invade and destroy intestinal cells. Infection often leads to diarrhoea, weight loss and poor growth rates.”

    She says that alongside good hygiene practices, anticoccidial treatments often have to be used strategically to manage the disease threat on many cattle and sheep units as a consequence.

    “This allows youngstock some level of exposure to the parasite so that they gain longer-term immunity, but also removes it before it is able to impact on productivity and further contaminate the environment.

    “Oral drenches such as Vecoxan® – which recently joined the MSD Animal Health portfolio of enteric products – are generally the most convenient way of ensuring that each calf or lamb receives the correct dose at the right time.

    “Easy-to-administer as a single oral dose, Vecoxan® is a flexible coccidiosis management solution that can be used in calves and lambs of any weight, in any management system and without any environmental restrictions or meat withdrawal period. In addition, its strategic use with all young animals in a group allows natural immunity to develop in your youngstock and there’s no need to dilute manure from treated animals before spreading1.”

    However, Dr Baxter-Smith adds that it is important to recognise that coccidiosis is only one of a number of causes of diarrhoea in calves and lambs. Farmers unsure about a particular disease management situation, should contact their vet for advice.

     

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    John Swire

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