Abstract
Acute pneumonia continues to represent a major source of morbidity, mortality, and healthcare expenditure in the U.S. It is imperative that clinicians at all levels of training have a firm understanding of this potentially deadly infection and its numerous complications. The current state of our diagnostic capabilities often dictates that clinicians will need to make important therapeutic decisions in patients presenting with acute pneumonia before identifying a culprit pathogen. Only after understanding the pathogenesis of pneumonia under different clinical circumstances can one devise rational empiric therapeutic regimens. In this practical review we offer a succinct description of the epidemiology and pathogenesis of acute pneumonia. We then proceed to discuss the evaluation and management of patients presenting with acute pneumonia with emphasis on the most valuable clinical trials and major guidelines that we use to inform our clinical decisions. Despite significant advances in the field of infectious disease over the past century, clinicians continue to recognize pneumonia, the infection of the pulmonary parenchyma, as a major source of morbidity and mortality. In this article we attempt to provide the general practitioner with a practical review of acute pneumonia and its complications. Prioritizing the needs of the general practitioner, we most thoroughly address community acquired pneumonia (CAP). Though we do not intend for this review to be completely comprehensive, in this article we also briefly discuss healthcare associated pneumonia (HCAP), hospital associated pneumonia (HAP), and ventilator associated pneumonia (VAP). Focusing much of our attention on the most important clinical trials and guidelines underpinning the diagnosis and management of this common problem, we hope that this publication will serve as a useful review to aid in clinical decision making. This review contains 65 references, 1 figure and 6 tables. Key Words: Pneumonia, viral pneumonia, bacterial pneumonia, community-acquired pneumonia, ventilator-associated pneumonia, VAP, healthcare-associated pneumonia, hospital-acquired pneumonia
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