Toxoplasmosis – caution during pregnancy

Toxoplasmosis is an infectious disease that primarily affects cats but can also be transmitted to humans, which is why it is classified as a zoonosis. Humans are considered intermediate hosts, although clinical symptoms do not usually occur. It only becomes truly dangerous when pregnant women come into contact with toxoplasma for the first time and the pathogen infects the unborn child.

INHALT
Cause and origin Symptoms Diagnosis Treatment Prophylaxis
Cause and origin

The pathogen that causes toxoplasmosis is a single-celled parasite whose main host is cats. Cats excrete certain stages of the toxoplasma, which can survive in the outside world as resistant spores for up to several years. These can then be ingested either by another cat or by a so-called intermediate host. The pathogen can therefore go through different stages of development.

Due to the many different intermediate hosts and the pathogen's resistance in the environment, there are many other sources of infection for humans besides cats, such as raw and undercooked pork and lamb, unwashed vegetables, unpasteurized goat's milk, contaminated soil, and sandboxes contaminated with cat feces.

Symptoms

Whether the disease breaks out and clinical symptoms appear in cats depends primarily on the type of infection. If cats infect each other, clinical symptoms rarely develop, although infection via an intermediate host almost always leads to the onset of the disease.

Older cats show only mild signs of illness, if any, such as slight diarrhea. Once infected, cats are immune to the pathogen and no longer shed any stages of the disease. However, younger or immunocompromised animals may experience much more severe symptoms. These include diarrhea, swollen lymph nodes, coughing, breathing difficulties, jaundice, eye infections, inflammation of the heart and skeletal muscles, and meningitis. Kittens may also die suddenly.

Chronic toxoplasmosis can only develop in cats with a compromised immune system. It is characterized by gait disorders, convulsions, emaciation, digestive problems, and eye inflammation.

Diagnosis

Since most cats show no or very few symptoms of toxoplasmosis infection, they are rarely taken to the vet. The focus is rather on determining whether an otherwise healthy cat is a carrier of toxoplasma in its developmental stages. This can be determined by a stool test, but only during the initial infection, which lasts about three weeks. Young animals are particularly affected, although only about one to two percent of all cats excrete toxoplasma.

Litter box
An infected cat can excrete toxoplasmosis development stages in its feces
Treatment

In adult cats, treatment is usually not necessary due to the mild symptoms. The infection is often discovered by chance during other examinations. In young or weakened animals with more severe cases, treatment with antiparasitic and antibiotic drugs is necessary.

Prophylaxis

The best measure to effectively protect your cat from infection with toxoplasma is to feed it only meat that has been heated or frozen for a long time, or ready-made food. This significantly reduces the risk of infection, at least for cats that live indoors. Due to potential contact with rodents, the risk of infection cannot be completely ruled out for cats that go outdoors.