Treatment of coccidiosis
When to treat can be a matter of knowing the farm’s history and when challenges are expected. In general, calves are at most risk from 3 weeks – 6 months of age, and with indoor rearing systems, treatment can be given one week before the expected disease outbreak, or two weeks after a significant stress.
What are the treatment options?
In many circumstances, hygiene measures alone will not adequately control the level of oocysts in the environment. And, as noted previously, with oocyst excretion from adults at a very low level, it is infections in lambs and calves that are the source of the high levels of oocysts that can lead to clinical disease and production losses.
In this case, appropriate medication can be targeted at young stock that have been exposed to a significant challenge, thus preventing disease while allowing natural immunity to develop. Treatment options for young stock include sulphonamides (antibiotics, by injection), decoquinate (in feed) or the triazinone derivatives diclazuril and toltrazuril (oral drenches). Individuals with clinical signs of disease may also need other supportive treatments until the gut damage has had time to heal.
Whilst in-feed preparations rely on all animals eating enough to get an effective dose, oral drenches are generally the most convenient way of ensuring that each animal receives the correct dose at the correct time, allowing enough exposure to stimulate immunity before removing the parasites.
Management of coccidiosis
Good management of coccidia means helping animals to avoid disease and production losses whilst ensuring youngstock get enough exposure to the parasite to develop immunity.
Limiting the build-up of oocysts in the environment will help reduce infection pressure and the chances of disease. This can be done by taking simple measures such as:
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