Key Points: 1. Pellagra is due to deficiency of niacin and/or nicotinic acid (vitamin B 3 ) and presents with the classic tetrad “the 4 D’s”: diarrhea, dermatitis, dementia, and death. 2. Patients with scurvy (vitamin C deficiency) exhibit follicular…
Key Points: Deep Fungal Infections 1. Deep fungal infections can be divided into subcutaneous (localized), systemic, and opportunistic categories. 2. Neutropenic patients are particularly at risk for systemic phaeohyphomycosis, aspergillosis, fusariosis, and mucormycosis. 3. Patients with impaired cellular immunity are…
Acknowledgment The authors wish to acknowledge the invaluable input of Genevieve L. Egnatios, MD, Karen Warschaw, MD and Loren Golitz, MD, in coauthoring previous editions of this chapter. 1 What is the Runyon Classification system for mycobacteria? The Runyon Classification…