Management of Typhoid Fever
First-Line Treatment
- The American College of Physicians recommends azithromycin 500 mg once daily for 7 days as the preferred first-line treatment for typhoid fever in adults, due to widespread fluoroquinolone resistance exceeding 70% in endemic regions 1, 2
- For children, azithromycin 20 mg/kg/day (maximum 1g/day) for 7 days is recommended 1, 2
Treatment Outcomes
- Azithromycin demonstrates significantly lower risk of clinical failure (OR 0.48) compared to fluoroquinolones 1, 2
- Hospital stays are approximately 1 day shorter with azithromycin (mean difference -1.04 days) compared to fluoroquinolones 1, 2
- Relapse risk is dramatically lower with azithromycin (OR 0.09) compared to ceftriaxone 1, 2, 3
Resistance Patterns
- Fluoroquinolone resistance exceeds 70% in isolates from South Asia, with some regions approaching 96% resistance 4, 1, 2
- Over 70% of S. typhi and S. paratyphi isolates imported into the UK are fluoroquinolone-resistant 4
- Ciprofloxacin disc testing is unreliable for determining sensitivity; only isolates also sensitive to nalidixic acid should be considered fluoroquinolone-sensitive 4
Treatment Algorithm
- Collect blood cultures before starting antibiotics whenever possible, as they have the highest yield within the first week of symptom onset 4, 1, 2
- Start azithromycin 500 mg once daily for 7 days in adults 1, 2, 3
- For children: azithromycin 20 mg/kg/day (maximum 1g/day) for 7 days 1, 2
- For severe cases requiring IV therapy: ceftriaxone 1-2g IV/IM daily for 5-7 days in adults, or 50-80 mg/kg/day (maximum 2g/day) in children 1, 3
Monitoring and Adverse Effects
- Fever should clear within 4-5 days of appropriate antibiotic therapy 1, 2, 3
- Blood cultures have 40-80% sensitivity, with higher yields in the first week of symptoms 4
- Gastrointestinal symptoms: nausea, vomiting, abdominal pain, and diarrhea are common adverse effects of azithromycin 1, 2, 3