Stephen J. Schueler, M.D.

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Bronchiolitis Underlying Cause

The respiratory syncytial virus is the most common cause for bronchiolitis.

Other viruses and bacteria that may cause bronchiolitis include:

In bronchiolitis, the virus or bacteria invades and lives inside the cells that line the bronchial passages. This leads to airway inflammation with bronchoconstriction and increased mucus production. The smaller airways can become plugged from excess mucous, resulting in difficulty breathing.

Continue to Bronchiolitis Transmission

Last Updated: Jan 26, 2011 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
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PubMed Bronchiolitis References
  1. Domachowske JB, Rosenberg HF. Advances in the treatment and prevention of severe viral bronchiolitis. Pediatr Ann. 2005 Jan;34(1):35-41. [15693214]
  2. Flores G, Horwitz RI: Efficacy of beta2-agonists in bronchiolitis: a reappraisal and meta-analysis. Pediatrics 1997 Aug; 100(2 Pt 1): 233-9. [9240805]
  3. Kellner JD, Ohlsson A, Gadomski AM, Wang EE: Efficacy of bronchodilator therapy in bronchiolitis. A meta-analysis. Arch Pediatr Adolesc Med 1996 Nov; 150(11): 1166-72. [8904857]
  4. Lozano JM. Bronchiolitis. Clin Evid. 2004 Dec;(12):370-84. [15865644]
  5. Shay DK, Holman RC, Newman RD, et al: Bronchiolitis-associated hospitalizations among US children, 1980-1996. JAMA 1999 Oct 20; 282(15): 1440-6. [10535434]
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