Editing Asthma (section)

==== Infectious asthma ====
Infectious asthma is an easily identified clinical presentation.<ref>{{cite journal | vauthors = Hahn DL, Schultek NM  | title = Infectious Asthma: An Easily Identified Clinical Presentation with Implications for Diagnosis, Prognosis, Treatment, and Prevention of Asthma | journal = Journal of Asthma and Allergy | volume = 15 | pages = 1269–1272 |year = 2022 | pmid = 36164333 | pmc = 9508995 | doi = 10.2147/JAA.S379890 | doi-access = free }}</ref> When queried, asthma patients may report that their first asthma symptoms began after an acute lower respiratory tract illness. This type of history has been labelled the "infectious asthma" (IA) syndrome,<ref name="Infectious asthma: a reemerging cli">{{cite journal | vauthors = Hahn DL | title = Infectious asthma: a reemerging clinical entity? | journal = The Journal of Family Practice | volume = 41 | issue = 2 | pages = 153–157 | date = August 1995 | pmid = 7636455 }}</ref> or as "asthma associated with infection" (AAWI)<ref>{{cite journal | vauthors = Hahn DL, Peeling RW, Dillon E, McDonald R, Saikku P | title = Serologic markers for Chlamydia pneumoniae in asthma | journal = Annals of Allergy, Asthma & Immunology | volume = 84 | issue = 2 | pages = 227–233 | date = February 2000 | pmid = 10719781 | doi = 10.1016/S1081-1206(10)62760-3 }}</ref> to distinguish infection-associated asthma initiation from the well known association of respiratory infections with asthma exacerbations. Reported clinical prevalences of IA for adults range from around 40% in a primary care practice<ref name="Infectious asthma: a reemerging cli" /> to 70% in a speciality practice treating mainly severe asthma patients.<ref name="Outcomes of Antibiotics in Adults w">{{cite journal | vauthors = Wagshul FA, Brown DT, Schultek NM, Hahn DL | title = Outcomes of Antibiotics in Adults with 'Difficult to Treat' Asthma or the Overlap Syndrome | journal = Journal of Asthma and Allergy | volume = 14 | pages = 703–712 |year = 2021 | pmid = 34163182 | pmc = 8216074 | doi = 10.2147/JAA.S313480 | doi-access = free }}</ref> Additional information on the clinical prevalence  of IA in adult-onset asthma is unavailable because clinicians are not trained to elicit this type of history routinely, and recollection in child-onset asthma is challenging. A population-based incident case-control study in a geographically defined area of Finland reported that 35.8% of new-onset asthma cases had experienced acute bronchitis or pneumonia in the year preceding asthma onset, representing a significantly higher risk compared to randomly selected controls ([[odds ratio]] 7.2, 95% confidence interval 5.2–10).<ref>{{cite journal | vauthors = Rantala A, Jaakkola JJ, Jaakkola MS  | title = Respiratory infections precede adult-onset asthma | journal = PLOS ONE | volume =  6| pages = e27912 |year = 2011 | issue = 12 | pmid = 22205932 | pmc = 3244385 | doi = 10.1371/journal.pone.0027912 | bibcode = 2011PLoSO...627912R | doi-access = free }}</ref>