TAC1 and infection: SaDRD1 mRNA expression was reduced in renal primary cells by ~13-fold at 40 h post-infection (Fig. 5A, **p < 0.01), and a concomitant increase in NKA activity was observed (7.93 ± 0.61 μmolPi/mgprot/h) compared to the negative control (3.95 ± 0.39 μmolPi/mgprot/h) (Fig. 5A, **p < 0.01).