The nurse practitioner manages Fungal Infections through evidence-based antimicrobial prescribing, infection prevention, and antimicrobial stewardship principles. Assessment includes exposure and travel history, immunization status, immunocompromised state evaluation, focused physical examination for infection source identification, and interpretation of microbiological studies (Gram stain, culture and sensitivity, molecular diagnostics including PCR, serological testing, and inflammatory biomarkers including procalcitonin for bacterial versus viral differentiation). The clinician applies principles of empiric antimicrobial selection based on most likely pathogens, local resistance patterns (antibiogram), infection site and severity, and patient-specific factors (allergies, renal/hepatic function, drug interactions, pregnancy status). The clinician de-escalates therapy based on culture results and clinical response, selects appropriate duration of therapy per current guidelines, monitors for treatment response and adverse effects (including C. difficile risk, nephrotoxicity, hepatotoxicity, drug-specific monitoring such as vancomycin trough levels), and applies infection prevention and control measures. Antimicrobial stewardship competencies include avoiding unnecessary antibiotic prescribing for viral infections, using narrow-spectrum agents when possible, implementing IV-to-oral conversion, and educating patients on appropriate antibiotic use and completion of prescribed courses.