Severity of disease in patients with HAP or VAP due to PVL positive and Download Table CAP, HCAP, HAP and VAP Diagnosis and Treatment HCAP GrepMed VAP #HAP #pneumonia The diagnosis of VAP is difficult as clinical signs suggestive of pneumonia, such as fever, tachycardia, and leukocytosis, are nonspecific in critically ill patients. Moreover, particularly in PDF] Clinical practice guidelines for hospital acquired pneumonia and ventilator associated pneumonia in adults. Semantic Scholar