Fig. 6

Relative abundances of bacterial genera defining four nasopharyngeal bacteriome types according to De Boeck et al. [60]. Samples were collected in the morning and in the afternoon (after an 8 h exposure to the workplace environment) and classified according to the participants’ workplaces – maternity hospital (NEO/N; n = 8), pediatric hospital (ENT/E; n = 6), and the research center (RCX/R; n = 8). One nasopharyngeal sample (E6) collected in the afternoon was excluded from the analysis due to the low DNA conent in the sample (MISSING). Left and right grey barplots show the numbers of reads in the respective samples