A 28-year-old man from Delhi presents with a 10-day history of sustained fever, headache, rose spots on the trunk, and hepatosplenomegaly. Blood culture grows Salmonella typhi. He has no contraindications to any antibiotic. What is the drug of choice for uncomplicated enteric fever in this patient?

Explanation

## Drug of Choice for Uncomplicated Enteric Fever **Key Point:** Fluoroquinolones (ciprofloxacin or ofloxacin) are the current first-line agents for uncomplicated enteric fever in India, especially in regions with high prevalence of multidrug-resistant (MDR) and nalidixic acid-resistant (NAR) S. typhi. ### Current Treatment Landscape in India **High-Yield:** The choice of antimicrobial for enteric fever has evolved dramatically over the past two decades due to emerging resistance patterns: | Agent | Status | Resistance Pattern | Current Use | |-------|--------|-------------------|-------------| | Chloramphenicol | Obsolete | Common MDR | Rarely used; historical agent | | Ampicillin | Obsolete | Common MDR | Rarely used; historical agent | | Trimethoprim-sulfamethoxazole | Obsolete | Common MDR | Rarely used; historical agent | | Fluoroquinolones | First-line | NAR emerging in 10–20% | DOC for uncomplicated fever | | Third-generation cephalosporins | Second-line/severe | Minimal resistance | Reserved for severe/complicated cases | ### Rationale for Fluoroquinolone as DOC 1. **Excellent oral bioavailability** — allows step-down from IV to oral; reduces hospitalization duration. 2. **Intracellular penetration** — reaches macrophages and bile, where Salmonella resides. 3. **High cure rates** — 95–98% in uncomplicated cases. 4. **Low resistance in India** — NAR prevalence is 10–20%, still acceptable for empiric use in uncomplicated disease. 5. **Dosing:** Ciprofloxacin 500 mg BD × 5–7 days (oral) or 400 mg BD IV (if unable to tolerate oral). **Clinical Pearl:** In this patient with classic enteric fever (sustained fever, rose spots, hepatosplenomegaly, positive blood culture) and no red flags for severity, fluoroquinolone monotherapy is appropriate and guideline-recommended. ### When to Use Alternatives - **Ceftriaxone (3rd-gen cephalosporin):** Reserved for severe/complicated enteric fever (encephalitis, myocarditis, perforation), pregnancy, or fluoroquinolone-resistant strains. - **Chloramphenicol & Ampicillin:** Historically important but now obsolete due to widespread MDR; should NOT be used empirically. **Mnemonic — FQ-FIRST:** **F**luoroquinolones **I**nitial choice, **R**esistance low, **S**evere cases need **T**hird-gen cephalosporins. [cite:Park 26e Ch 32]