• Daiana Stolz and Michael Tamm.
• Clinic of Respiratory Medicine and Pulmonary Cell Research, University Hospital Basel, Petersgraben 4, Basel CH-4031, Switzerland. stolzd@uhbs.ch
• Curr Opin Pulm Med. 2009 Mar 1;15(2):126-32.

Purpose Of ReviewThe relevance of antibiotics in the treatment of acute exacerbation has been a matter of debate for several years. Although expert recommendations may vary, there is general agreement about the fact that not all patients will equally experience benefit from antibiotics: apart from decreasing costs, discriminate use of antibiotics is capable of significantly reducing subsequent colonization or infection with antibiotic-resistant bacteria.Recent FindingsSeveral meta-analyses support the concept that patients with increased dyspnea, increased sputum volume, and increased sputum purulence will benefit from antimicrobial therapy. Evidence from randomized trials substantiates the prescription of antibiotics in patients receiving mechanical ventilation and the avoidance of antibiotics in those admitted with low serum procalcitonin levels.SummaryMost of the proposed criteria for prescribing or withholding antibiotics for acute exacerbation have been analyzed in different retrospective study designs. Patients requiring ICU care and mechanical ventilation for chronic obstructive pulmonary disease exacerbation should receive antibiotics. Conversely, antibiotics can be withheld in patients admitted to the emergency department with low serum procalcitonin levels. Patients with type I Anthonisen exacerbation and those with severe functional impairment are likely to benefit from antibiotics. Further investigations are needed to compare long-term outcome in patients treated according to clinical and functional criteria.

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