Toxoplasmosis seroepidemiology in pregnant women in a city in the Northwest region of the Paraná State, Brazil oleh Isabel Cristina da Silva Caetano, Graziela Vendrame Rodrigues, Daniela Dib Gonçalves, Fabiana Maria Ruíz Lopes-Mori, Regina Mitsuka-Breganó, Roberta Lemos Freire, Italmar Teodorico Navarro, Francisco Hiroshi Matumoto, José Gonçalves Dias Neto, Luiz Sergio Merlini