Assessment of bioaerosols in indoor air of glasshouses located in a botanical garden

•    Collected plants and soil are major sources of bioaerosol particles in glasshouses.

•    Increased concentrations of PM_2.5 and PM₁ favour the persistence of bioaerosols.

•    Bioaerosols are predominated by respirable and fine particles in size below 4.7 μm.

•    Gram-positive bacteria prevail in glasshouses and moulds in the garden outdoor.

•    Pathogenic and opportunistic microorganisms can be found in the glasshouse air.

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