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Fetal therapy of severe symptomatic toxoplasmosis using azithromycin

Severe symptomatic fetal toxoplasmosis rarely occurs after the maternal primary infection of Toxoplasma gondii. We herein report our experience of fetal therapy of symptomatic toxoplasmosis using azithromycin. Ultrasound assessment at 23 weeks' gestation revealed fetal ascites, cardiac effusion, cardiomegaly, enlarged lateral ventricles and thickened placenta. Serum Toxoplasma gondii antibody titer was ×81 920. Toxoplasma immunoglobulin M was 2.4 index (normal, <0.8 index), and immunoglobulin G was ≥240 IU/mL (normal, <6 IU/mL). Maternal oral administration of azithromycin in addition to sulfadoxine, pyrimethamine and acetylspiramycin was conducted. Spontaneous vaginal delivery occurred at 32 weeks and a male infant weighing 2036 g was born. Hepatosplenomegaly, chorioretinitis, hydrocephalus, intracranial calcifications, ascites, and meningitis were confirmed after birth. The infant underwent therapy with pyrimethamine and sulfadiazine. It seems imperative to establish a new drug choice for fetal therapy of severe symptomatic toxoplasmosis in order to reduce the maternal and fetal risks of drug side‐effects.