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. Author manuscript; available in PMC: 2018 Apr 12.
Published in final edited form as: Cell Host Microbe. 2017 Apr 12;21(4):421–432. doi: 10.1016/j.chom.2017.03.011

Figure 3. Understanding dispersal across gross anatomic sites.

Figure 3

A) The nasal sinuses drain to the turbinates and similarly receive periodic influxes of mucus. B)The Eustachian tube may be a route for the dispersal of organisms between the nasal cavity, nasopharynx and the middle ear and vice versa. C) The nasal and oral cavities both drain to the pharynx and may serve as sources of colonists to the trachea and subsequently to the lungs. Alternatively, each may seed the stomach and ultimately the intestinal tract via the esophagus.