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Fig. 2 | Microbiome

Fig. 2

From: Microbiota of the indoor environment: a meta-analysis

Fig. 2

Sources tracking of indoor environments. A subset of samples from each of the studies (see Table 1) was analyzed using the SourceTracker algorithm to apportion microbial sources for different “sinks” of indoor settings. Prominent sources were outdoor air, skin, soil, and laboratory kits (a), although the likelihood of identifying sources varied strongly by study. b Those studies that were more likely to have sources identified were those that originally included source environment samples (using their own sampling and laboratory methods—denoted by asterisk in the figure), contained samples that were more strongly sourced from skin, or targeted the same variable region as those in the source samples

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