Toxoplasma gondii are parasitic protozoa which cause Toxoplasmosis. Cats have been shown to be the major reservoirs for this infection, but transmission to humans often comes from eating infected meats from pork, lamb, or venison. In otherwise healthy humans, infection may cause flu-like symptoms, or may cause no symptoms at all. People with compromised immune systems, such as pregnant women and HIV infected individuals, may become seriously ill. Toxoplasmosis can damage the brain and eyes, and can sometimes be fatal. Antibiotic treatment varies based on the patient €™s current state of health.