| newborn screening for congenital toxoplasma infection: five years experience in massachusetts, usa. | since 1986, all massachusetts newborn filter paper blood specimens, and some from new hampshire, have been screened for the presence of igm antibodies to toxoplasma gondii using an enzyme-linked igm capture assay. among approximately 530,000 infants screened, 40 had serologically confirmed congenital toxoplasma infection, and 4 additional infants had borderline serologies, for an overall identification and treatment rate of 1:12,000. false positive results from the newborn's filter paper specime ... | 1992 | 1290076 |