Toxoplasmosis is an infectious disease caused by a parasite that spreads from animals to humans.
It is a common disease that is seldom recognized because most infected people do not become sick. In those who have symptoms of the disease, the illness is mild, with swollen lymph nodes and some discomfort. Estimates suggest that one-third of Canadians have been infected. The number of toxoplasmosis cases of occupational origin is not known. The microorganism Toxoplasma gondii causes toxoplasmosis.