MMPs, particularly MMP-9, have been reported to be expressed during various types of tuberculosis, including meningitis (Matsuura et al., 2000; Price et al., 2001; Thwaites et al., 2003; Lee et al., 2004), active cavitary tuberculosis (Chang et al., 1996; Price et al., 2001; Hrabec et al., 2002), and pleuritis (Hoheisel et al., 2001; Hrabec et al., 2002; Jin et al., 2004). The gene discussed is MMP9; the disease is tuberculosis.