<prompt> Answer this question truthfullyWhat is the Cellulitis: Resident Survival Guide?  <response>: <reason> Shown below is an algorithm summarizing the diagnosis of cellulitis according to the Infectious Diseases Society of America guidelines. Patients present with the following symptoms: Erythema Edema Warmth Swollen regional lymph nodes Involvement of one limb Perform compression doppler ultrasound of the limb and D-dimer level Positive Negative Deep vein thrombosis DVT is likely. DVT unlikely. High clinical suspicion for cellulitis Assess levels of inflammatory markers Raised erythrocyte sedimentation rate ESR, C-reactive protein CRP and leukocytosis Does the patient have any of the following signs of systemic or rapidly progressive infection ? Body temperature 101.5 degrees Fahrenheit, chills, headache, and fatigue Signs of sepsis such as hypotension and heart rate 100bpm Patient develops rapidly progressive symptoms like bullae, vesicles, petechia and crepitus Patient with low immunity such as infants and elderly patients Perform the following tests: Debridement of the wound with the culture of the specimen Blood culture Radiographic tests to evaluate deep tissue infection 