%0 Journal Article %T Toxoplasmosis and the laboratory: diagnosis and a constant striving for improvement %A FERREIRA Antonio Walter %A CAMARGO M¨¢rio E. %J Revista do Instituto de Medicina Tropical de S£¿o Paulo %D 2002 %I Instituto de Medicina Tropical %U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0036-46652002000300001