Diagnosis of Acute Toxoplasmosis by IgG and IgM Antibodies and IgG Avidity in Pregnant Women from Mashhad, Eastern Iran - SHARIFI, Karam; HOSSEINI FARASH, Bibi Razieh; TARA, Fatemeh; KHALEDI, Azad; SHARIFI, Karim; SHAMSIAN, Seyed Ali Akbar (Iranian Journal of Parasitology, 2019)