IFNG and infection: STAT-1 mRNA expression continuously declined during infection from 0.93 ± 0.11-fold in the healthy control to 0.11 ± 0.05-fold at day 35 p.i., except for day 30 p.i. (1.11 ± 0.53-fold), probably as a response to a significantly higher level of IFN-γ in the peritoneal cavity.