Microbes in subways Bioaerosols in the Barcelona subway system – X. Triadó-Margarit – Indoor Air ($6 to rent, $38 to own) (…) We examined the microbiological composition and abundance in space and time of bioaerosols collected in the Barcelona subway system during a cold period. (…) Multitag 454 pyrosequencing of the 16S rRNA gene was used to …