Bronchiolitis in Adult

Few diseases have a greater effect on the health of young children than viral respiratory illness of lower tract. This does not happen in adults, possibly due to the different states of activation and expression of the innate immune response and acquired immune responses in these two age groups. Bronchiolitis is a general term used to describe non-specific inflammatory injury that primarily affects the small airways and generally limits the extent to interstice. In the adult clinic, conventional and high-resolution radiology and respiratory functional studies are suggestive of the diagnosis but the etiology usually requires tissue. For this reason, in this chapter, although there are clinical and radiological classifications, we will use the histologic classification. The goal is a simple, concise, and updated monograph issue discussing the different types of adult bronchiolitis, pathophysiology, diagnosis, and current therapeutic options. A short discussion on SARS-CoV-2 bronchiolitis is also included at the end.