Treatment of Typhoid Fever
For uncomplicated typhoid fever, use azithromycin 10-20 mg/kg daily for 5-7 days as first-line therapy in children, or ciprofloxacin 15 mg/kg twice daily for 7-10 days in adults (except in South Asia where fluoroquinolone resistance is widespread), or ceftriaxone 80 mg/kg daily for 5-7 days as second-line for both populations. 1
Adults
First-Line Options
- Azithromycin: 20 mg/kg daily orally for 5-7 days 1
- Ciprofloxacin: 15 mg/kg twice daily orally for 7-10 days 1
- Critical caveat: Do NOT use ciprofloxacin for cases originating from South Asia due to widespread fluoroquinolone resistance 2
- Ceftriaxone: 80 mg/kg daily IV for 5-7 days 1
Geographic Resistance Considerations
The choice of antimicrobial must be guided by local resistance patterns 2, 3. Ciprofloxacin-resistant and ceftriaxone-resistant typhoid is now common in Pakistan 2. Extensively drug-resistant (XDR) strains have emerged requiring azithromycin and/or meropenem 3.
Treatment Duration and Route
Treatment duration is typically 7-10 days for fluoroquinolones and azithromycin, and 5-7 days for ceftriaxone 1. Patients can transition from IV to oral therapy once clinically improved and able to tolerate oral medications.
Children
First-Line Options
- Ciprofloxacin: 15 mg/kg twice daily orally for 7-10 days (maximum 750 mg/dose) 1
- Again, avoid in South Asian cases due to resistance
- Azithromycin: 20 mg/kg daily orally for 5-7 days 1
- Ceftriaxone: 80 mg/kg daily IV for 5-7 days 1
Alternative for Severe Cases
For severe infections or when first-line agents fail, ceftriaxone 50-80 mg/kg daily IV remains effective 1.
Pregnant Patients
Pregnancy does not appear to adversely affect typhoid outcomes, but antimicrobial selection is critical due to fetal safety concerns 4.
Safe Options in Pregnancy
- Ceftriaxone: 80 mg/kg daily IV for 5-7 days 1
- This is the safest choice in pregnancy
- Ampicillin/Amoxicillin: If susceptibility confirmed (though resistance is common) 4
- Azithromycin: Can be used if cephalosporins unavailable, though less data in pregnancy
Avoid in Pregnancy
- Fluoroquinolones (ciprofloxacin, levofloxacin): Should be avoided due to potential cartilage toxicity in the developing fetus 4
- Chloramphenicol: Avoid due to "gray baby syndrome" risk
Important note: Pregnant women with typhoid were historically treated almost exclusively with ampicillin/amoxicillin or third-generation cephalosporins, while non-pregnant women received quinolones 4. This practice should continue, favoring ceftriaxone as first-line.
Extensively Drug-Resistant (XDR) Typhoid
For XDR strains (resistant to chloramphenicol, ampicillin, trimethoprim-sulfamethoxazole, fluoroquinolones, AND third-generation cephalosporins):
- Azithromycin alone or in combination with meropenem 3
- Consider combination therapy targeting both intracellular and extracellular bacteria 3
Comparative Effectiveness Evidence
Ceftriaxone vs. Azithromycin: Ceftriaxone may result in decreased clinical failure compared to azithromycin (RR 0.42,95% CI 0.11-1.57), with shorter time to defervescence (mean difference -0.52 days) 5. However, azithromycin may reduce relapse rates.
Fluoroquinolones vs. Chloramphenicol: Fluoroquinolones significantly reduce clinical relapse compared to chloramphenicol (OR 0.14,95% CI 0.04-0.50) 6, though this advantage is negated by widespread resistance in endemic areas.
Ceftriaxone vs. Fluoroquinolones: No significant differences in clinical failure, microbiological failure, or relapse rates 5, making ceftriaxone an excellent alternative when fluoroquinolone resistance is present.
Common Pitfalls
- Using ciprofloxacin for South Asian cases: This is the most critical error—fluoroquinolone resistance is now the norm in this region 2
- Inadequate treatment duration: Completing the full 7-10 day course is essential to prevent relapse
- Not considering local resistance patterns: Always check local antibiograms before selecting therapy 3
- Using fluoroquinolones in pregnancy: Stick to ceftriaxone or azithromycin 4