CXCL8 and pulmonary tuberculosis: Patients with AFB-low active pulmonary TB had a higher level of IL-8/CXCL8 mRNA (0.2±0.03, n = 6, p<0.05), but not IP-10/CXCL10 mRNA (0.5±0.2, n = 6) than normal subjects (Figure 3A).