While IFN-γ was overexpressed in cells infected with MDR-PA compared to the S-PA strain at 4 h, 6 h, and 12 h post-infection (>3-fold, p = 0.01), TNF-α was also significantly expressed in MDR-PA infected microglia cells at 4 h (4-fold vs. 2.2, p = 0.04), 6 h (3.8-fold vs. 2.7, p = 0.006) and 12 h (2.8-fold vs. 2.2, p = 0.04) post-infection. This evidence concerns the gene TNF and infection.