弓形虫 ,是一种细胞内寄生原虫 ,广泛寄生于人和动物的有核细胞内 ,引起人兽弓形虫病 ,严重威胁人类健康及畜牧业生产。尤其孕妇感染弓形虫后 ,常危及胚胎发育导致流产、早产、死产、畸胎 ;儿童先天性感染弓形虫后 ,主要危及大脑发育导致智力低下、头痛头晕、癫痫抽搐等。经 19 Toxoplasma gondii, an intracellular parasitic protozoan, widely parasites in human and animal nucleated cells, causing human and animal toxoplasmosis, a serious threat to human health and animal husbandry production. In particular, pregnant women infected with Toxoplasma gondii, often endanger embryonic development leading to miscarriage, premature birth, stillbirth, teratogenic; children congenital infection Toxoplasma gondii, the main endanger brain development lead to mental retardation, headache, dizziness, epileptic convulsions. After 19