Most people infected with the toxoplasmosis parasite have no symptoms. Some people may experience similar effects to the flu or mononucleosis such as:

• Body pain.
• Swollen glands.
• Headaches.
• Fever.
• Fatigue.
• Sore throat (occasionally).

People with weakened immune systems may experience signs of severe infection such as:

• Headaches.
• Confusion.
• Lack of coordination.
• Convulsive seizures.
• Lung problems that look like tuberculosis or pneumonia.
• Blurred vision, caused by inflammation of the retina.