The PES (Pseudomonas, Enterobacteriaceae ESBL, Methicillin-resistant Staphylococcus aureus) Concept in Community-acquired Pneumonia
One of the main concerns about the management of community-acquired pneumonia (CAP) is to choose an adequate empirical antibiotic treatment. Patients with CAP usually respond to the standard antibiotics suggested by CAP guidelines; however, a small percentage of patients need a different and more aggressive treatment because of the presence of resistant pathogens. The critical point is to identify this small subgroup of CAP patients and to avoid the overtreatment of the remaining CAP patients. Therefore, it is important to create a tool to stratify patients at risk for resistant pathogens. The definition of health care–associated pneumonia has not proven to be effective. Moreover, recent studies proposed new scores on the basis of specific factors to screen the population at risk. Howeve...