Toxoplasmosis is a zoonosis (infection) caused by an intracellular parasite (Toxoplasma gondii) that can infect the host in the following ways:
- Oral (to humans through consumption of animal products containing cysts, or by eating unwashed vegetables and fruits containing infective oocysts);
- Transplacental (the human fetus through infection during pregnancy and crossing the placenta);
- By simply petting a cat with fur unkempt, dirty, which is carrying T. gondii oocysts.

This zoonosis is a danger meant for those with immunodeficiency diseases and not only as a real threat for pregnant women (may cause fetal birth defects, blindness, epilepsy or neurovegetative disorders of the nervous system)

Toxoplasma gondii is a biological cycle dixen (or evolutionary cycle that develops on two hosts), definitive host is the cat and other wild cats in which the parasite multiplies sexed body, forming oocysts. These are eliminated in the faeces external environment, where they are taken from the intermediate host. In the body of the intermediate host, the parasite develops systemic multiplying asexually, resulting in tissue cysts (intermediate hosts are represented by mammals and birds).

Complete life cycle (development elements both sexed and asexual phase) can take place only Felidae family, cats are both final and intermediate host. Removing oocysts start after 6-14 days, copro - eliminating lasting 7-21 days (a cat eliminates over 10 million oocysts daily).
The sources of contamination are the animals with latent infection or those suffering from toxoplasmosis, starring lead role infected cats (other species removed by secretions and excretions)

Oocysts in the environment resistance is up to 18 months (under favorable conditions), in the house - at room temperature retains the ability infected more than a year. Are destroyed by heating at 60 C and the temperature of minus 20 C after 3 days.

Symptoms: - the dog, the disease progresses with fever, digestive syndrome (loss of appetite, vomitisme bilious, enteritis, diarrhea stool white), respiratory, nervous cee needles make the disease is often confused with distemper (a disease affecting animals under 2 years).

Diagnosis: - coproscopic examination (cat), serological tests (highlighting specific antibodies)
In pregnant women:
- If the woman is seropositive, low titer, 2-3 exams, no risk to the fetus;
- If the woman is seropositive, with increased strength or increased since the last test, or if it has been identified Ig M, there is an imminent risk to the fetus;

It is recommended that these tests be performed at least 3 months before conception (so they can establish the necessary measures so as not to infect T. gondii).

A person who had toxoplasmosis and cured, it can not be infected later. For most, toxoplasmosis is not dangerous and heal itself (transplacental cause brain damage and blindness). Although a pregnant woman with a healthy immune system does not pose a risk when infected, treatment is needed to protect the fetus.