△Ts ysts Both oocysts and tissue cysts transform 弓形虫生活史关系图 into tachyzoites shortly after ingestion Tachyzoites localize in neural and muscle tissue and develop into tissue cyst bradyzoites. If a pregnant woman becomes infected, tachyzoites can infect the fetus via the bloodstre △= Infective Stage A= Diagnostic Stage a Diagnostic Stage 1)Serological diagnosis 2)Direct identification of the parasite from peripheral blood, amniotic fluid, or in tissue sections弓形虫生活史关系图