Official guideline from the American College of Emergency Physicians.
summary by Eric Steinberg, DO
Do not routinely obtain blood cultures in patients admitted with community-acquired pneumonia (CAP).
There is insufficient evidence to establish a benefit in mortality or morbidity from antibiotics administered in less than 4, 6, or 8 hours from emergency department (ED) arrival.
What do the icons mean?
Generally accepted principles for patient management that reflect a high degree of clinical certainty (ie, based on strength of evidence Class I or overwhelming evidence from strength of evidence Class II studies that directly address all of the issues).
Recommendations for patient management that may identify a particular strategy or range of management strategies that reflect moderate clinical certainty (ie, based on strength of evidence Class II studies that directly address the issue, decision analysis that directly addresses the issue, or strong consensus of strength of evidence Class III studies).
Other strategies for patient management that are based on preliminary, inconclusive, or conflicting evidence, or in the absence of any published literature, based on panel consensus.