Additional file 2: of The developing premature infant gut microbiome is a major factor shaping the microbiome of neonatal intensive care unit rooms

Biomass in air samples from a NICU. 16S rRNA gene template copy number was quantified via ddPCR. Each dot reflects the average across triplicate runs. Gray diamonds represent averages per environment. Bioaerosol measurements in (A) are separated by small and large size fractions (particles 1–4 and > 4 μm, respectively). HVAC samples in (B) were collected from the exterior facet of the HVAC system and represent pretreated air. Counts are normalized per sample per day of collection. (PDF 16 kb