CD79A and infection: IgA concentration almost doubled in the dual compared to the single infection for T. retortaeformis but not for G. strigosum; specifically, single and dual infections mean ± SD: for T. retortaeformis = 0.476 ± 0.493 and 0.827 ± 0.627; for G. strigosum = 0.256 ± 0.302 and 0.246 ± 0.250.