The lung is by no means a sterile place, as was assumed for a long time. In fact, it actually harbors a diverse microbial ecosystem. We know from previous studies that changes in the lung microbiome are associated with diseases such as cystic fibrosis, asthma or chronic obstructive pulmonary disease (COPD). Environmental factors such as smoking, nutrition in infancy or the use of antibiotics are important factors for the composition and stability of the microbial community in the lung.
Click here for original story, Bacterial colonization of the lung also depends on the host genome
Source: Phys.org