Coccidiosis, caused by parasites, is a common disease in rabbits. A distinction is made between liver coccidiosis and intestinal coccidiosis. Young, stressed, or weakened animals are particularly at risk.
The pathogen that causes coccidiosis is a single-celled parasite that is present in small numbers in healthy animals without causing disease and is excreted. However, the disease only breaks out when the single-celled organisms are able to multiply excessively due to an immature or weakened immune system or feeding errors. Liver or bile duct coccidiosis is caused by a specific type of coccidia, while intestinal coccidiosis is often a mixed infection involving many different types of coccidia. The severity of the disease varies depending on the pathogenicity (disease-causing potential) of the individual species.
The pathogen is usually transmitted during the rearing of young animals via the mother, through close contact with other rabbits, or through feed or water contaminated with feces. The risk of infection is particularly high in farms with high animal stocking densities and poor hygiene.
Different symptoms occur depending on whether the liver or intestines are affected. In general, the first signs of both forms of the disease are usually a lack of weight gain in young rabbits or weight loss in older rabbits. In intestinal coccidiosis, infection with coccidia causes extensive inflammation of the intestinal mucosa. The acute form is characterized by digestive disorders with watery to bloody diarrhea, gas formation, apathy, and loss of appetite. The severe diarrhea can very quickly lead to severe fluid loss, which can often be life-threatening. In young animals, the mortality rate can be as high as 100%.
Hepatic coccidiosis mostly affects older rabbits and can be asymptomatic in mild cases. In more severe cases, it causes severe inflammation of the bile ducts and liver tissue. Abscesses form on the surface of the liver, causing it to swell. The animals lose weight, have a dull coat and show signs of severe general distress, but only rarely have diarrhea. Ascites, jaundice, constipation and flatulence may also occur.
If your rabbit shows one or more of the symptoms listed above, or if they have already occurred, please consult a veterinarian promptly, as the disease can quickly become life-threatening, especially in young animals! Please also note that dogs and cats can also become infected with coccidia. Ingesting rabbit feces can cause recurrent diarrhea in dogs and cats. If dogs or cats live in a household with rabbits, they should also be tested for coccidia and treated if necessary.
The attending veterinarian will be able to make a preliminary diagnosis based on your preliminary report and a thorough clinical examination. However, the symptoms of intestinal coccidiosis are also similar to those of many other diseases.
To confirm the diagnosis, the veterinarian should always perform a microscopic examination of the feces. Since the parasites are not excreted continuously, it is advisable to collect feces samples over several days and take them to the veterinarian for examination.
The infection can be successfully treated with coccidia-killing preparations. However, in addition to medication, strict cleaning and hygiene measures must be implemented and maintained in the animals' housing or enclosure to prevent the rabbits from becoming reinfected, for example by eating their own feces. The highly resistant oocysts (the developmental stage of coccidia) are reliably killed by boiling water.
To compensate for extreme fluid loss, the veterinarian may administer electrolyte infusions and preparations that stabilize the intestinal flora to animals with persistent diarrhea. Occasional secondary bacterial infections are treated with antibiotic medication.
The prognosis depends greatly on the age of the animal and the time of diagnosis. In very young animals, the chances of recovery are very poor, with a mortality rate of almost 100%. Adult animals whose infection is treated promptly and correctly have a much better prognosis.
Due to the widespread occurrence of the pathogen, infections with coccidia cannot be completely prevented. However, the risk of disease can be significantly reduced with simple husbandry and hygiene measures. In larger stocks, such as pet shops or animal shelters, feed racks and cages should be cleaned and disinfected daily. Hay and green fodder should only be fed from feed racks so that they do not come into contact with the litter.
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