Toxoplasmosis symptoms typically appear within 1 to 3 weeks after infection with Toxoplasma gondii, though the timing varies considerably. Most infected people experience no symptoms at all, as the immune system controls the parasite in otherwise healthy individuals. When symptoms do occur, they resemble mild flu-like illness: fever, fatigue, muscle aches, and swollen lymph nodes. Some people develop eye inflammation (ocular toxoplasmosis), which can cause blurred vision or eye pain. The incubation period—the time between infection and symptom onset—can range from days to weeks, making it difficult to pinpoint exactly when exposure occurred. Pregnant women and immunocompromised individuals face more serious risks. If a pregnant woman contracts primary infection, the parasite may cross the placenta and harm the fetus; timing of maternal infection affects transmission risk and severity. Immunocompromised patients (such as those with untreated HIV/AIDS) can develop severe disease or reactivation of dormant infection, sometimes causing brain inflammation (encephalitis) or other complications. Most cases resolve without treatment in healthy people, though antiparasitic medication may be recommended during pregnancy or for immunocompromised patients. If you suspect toxoplasmosis—especially if pregnant, immunocompromised, or experiencing persistent symptoms—medical evaluation is important for proper diagnosis and management.