The parasite that causes toxoplasmosis is found in almost all animals. Cats and birds are major sources of infection. Indoor cats pose less risk. Avoid cat feces (use gloves to change litter). Avoid handling birds. Never eat undercooked meats, particularly pork or lamb, or unwashed vegetables.

Symptoms can include:

• dull, constant headache
• changes in vision
• disorientation
• seizures

Toxoplasmosis can occur in people with advanced immune system disease caused by HIV. It can be treated with antibiotics, which need to be continued until the immune system improves through HIV (antiretroviral) therapy. If you are being treated for toxoplasmosis, see your provider promptly if your symptoms worsen or you develop a rash.