Expression levels of Dap12, Pilra, and Pilrb in lungs from control and S. aureus-infected mice. Transcription levels of Dap12, Pilra, and Pilrb in lungs from infected and uninfected WT mice were analyzed by qRT-PCR. Infected lungs were removed 48 h postinoculation. Levels are expressed relative to that of ubiquitin mRNA. *, P ≤ 0.05.