CD79A and infection: High T. gondii IgA antibody titers (≥5.0) were even more strongly predictive of recent infection: 31 (91.2%) of the 34 women with an IgA antibody titer of ≥5.0 had been acutely infected, whereas only 54 (9.1%) of 594 women with an IgA antibody titer of 4.9 or lower had been acutely infected (P < 0.001).