Figure 1From: Differential effects of frozen storage on the molecular detection of bacterial taxa that inhabit the nasopharynx Effect of frozen storage on the composition of bacterial OTUs found in the infant nasopharynx. The composition (mean number of OTUs) per subject against 16S rRNA-based T-RFLP before and after freezing at -70°C dichotomized by sex. Dotted lines represent females, and the bold dotted line shows the mean change. The difference in composition pre and post freezing was significant for female (p = 0.0014) but not for male infants (p = 0.56).Back to article page