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Correlation between bacterial culture and qPCR in quantifying Streptococcus pneumoniae in nasal wash (NW) samples. Quantification of pneumococci by culture and by qPCR are positively correlated. The Spearman rank correlation coefficient for samples positive by both culture and qPCR is 0.73. Dotted lines represent lower limits of detection. A p-value of ≤0.05 was considered to be significant.
