Table 1.

Representative bacteria in different circumstances

		Respiratory Tract ①,②	Lung③
Normal		Phylum and class: Proteobacteria, Firmicutes, Fusobacteria, Bacteroidetes. Genus: Pseudomonas, Streptococcus, Prevotella, Veillonella, Haemophilus, Neisseria.	Firmicutes, Bacteroidetes, Proteobacteria, Actinobacteria, Fusobacterium.
Cancer	Less	Propionibacterium, Enterobacteriaceae, Prevotella, Pseudobutyrivibrio, ruminis.	Atopobium
			Selenomonas
	More	M.tuberculosis, Helicobacter, Pylori, Actinomyces, Peptostreptococcus, Streptococcus, Wechsler, Modestobacter, Eubacterium xylanophilum, Eubacterium Eligens, Clostridium.	Phylum:
			Firmicutes
			TM7
			Genus:
			Veillonella, Megasphaera Filifactor Selenomonas