先天性弓形虫病可导致失明和智力障碍。估计美国的该病发病率为出生率的1/1000—1/10000。大多数先天性感染的婴儿出生时无症状。许多人在少年和青少年时期则出现严重的临床表现。85％的先天性弓形虫病(包括许多出生时没有症状的)在20岁以前会出现脉络膜视网膜炎。鉴于先天性弓形虫感染的婴儿在出生时一般不出现临床症 Toxoplasmosis can cause blindness and mental retardation. The incidence of the disease in the United States is estimated to be 1 / 1000-1 / 10000 of the birth rate. Most congenital infants are asymptomatic at birth. Many people have severe clinical manifestations during adolescence and adolescence. Eighty-five percent of congenital toxoplasmosis, including many asymptomatic at birth, develop chorioretinitis before the age of 20 years. In view of congenital Toxoplasma infections in infants generally do not appear at birth clinical symptoms