Increased hepatic microabscesses in TLR2-deficient infected mice. Two days after i.v. infection with 2 × 105 CFU of Listeria, the livers of infected TLR2+/+ (A), TLR2−/− (B), and MyD88−/− (C) mice contained multiple microabscesses. (D) Numbers of microabscesses per 20 fields quantified and expressed as means ± SD (*, P < 0.05). Histologic samples were stained with hematoxylin and eosin (magnification, ×200). (E, F, and G) Liver microabscesses from wild-type, TLR2−/−, and MyD88−/− mice, respectively, at a higher magnification (×400). Results are from one representative experiment of two independent experiments.