MMP1 and tuberculosis: Carriers of the MMP-1 genotype 2G/2G were significantly over-represented in Mexican TB cases (OR = 2.71, 95% CI 1.15–6.3, p = 0.02, Table 3) and in Peruvian TB cases (OR = 1.6, 95% CI 1.05–2.4, p = 0.027, Table 4).