Fig. 1From: Quantitative analysis of pathogens in the lower respiratory tract of patients with chronic obstructive pulmonary diseaseStandard curves for Staphylococcus aureus, Klebsiella pneumoniae, Streptococcus pneumoniae, Pseudomonos aeruginosa, Haemophilus influenzeae, and Moraxella catarrhalis assays. Mean threshold cycle (CT) value ± SEM of three replicates (three per run) for each reaction is shown in relation to the log of CFU calculated per 20 μl of reaction mixture. Relative correlation coefficient (R2) and linear regression equations are reported in the legendBack to article page