Typhoid Management
For uncomplicated typhoid fever, use ceftriaxone (2-4g IV daily for 7-14 days) as first-line therapy, particularly for patients returning from Asia where fluoroquinolone resistance exceeds 70%. 1
First-Line Antibiotic Selection
The choice of antibiotic depends critically on geographic origin and resistance patterns:
Ceftriaxone as Preferred First-Line
- Ceftriaxone is now the preferred empirical agent for patients from Asia due to widespread fluoroquinolone resistance 1
- More than 70% of S. typhi and S. paratyphi isolates imported to the UK are fluoroquinolone-resistant, but all remain sensitive to ceftriaxone 1
- Dosing: 2-4g IV once daily for 7-14 days (14 days preferred to reduce relapse risk) 1
Azithromycin as Oral Alternative
- Azithromycin is the best oral option for uncomplicated disease when fluoroquinolone resistance is confirmed 1
- Particularly effective for multidrug-resistant (MDR) and nalidixic acid-resistant (NAR) strains 2, 3
- In a 2021 trial, azithromycin achieved 85% clinical cure versus 62% with ciprofloxacin and 71% with cefixime 2
- Dosing: 20mg/kg/day (or 500mg-1g daily) for 7-14 days
- Shorter fever clearance time (5.8 days) compared to cefixime (7.1 days) or ciprofloxacin (8.2 days) 2
When Fluoroquinolones Can Still Be Used
- Only use fluoroquinolones if the isolate is sensitive to nalidixic acid on disc testing 1
- Ciprofloxacin disc testing alone is unreliable for determining true fluoroquinolone sensitivity 1
- If sensitive, fluoroquinolones remain highly effective with fever clearance <4 days and cure rates >96% 1
Critical Pitfall: Cefixime Limitations
Avoid cefixime as first-line therapy - it has reported treatment failure rates of 4-37.6% 1 and performs significantly worse than azithromycin in head-to-head trials 2
Treatment Duration
- Continue treatment for 14 days to reduce relapse risk 1
- Relapse rates: fluoroquinolones <8%, ceftriaxone <8%, azithromycin <3% 1
Empirical Treatment Approach
Start empirical antibiotics immediately if:
- Strong clinical suspicion of enteric fever AND
- Patient is clinically unstable 1
Do not wait for blood culture results in unstable patients.
Supportive Care
- Maintain hydration and electrolyte balance
- Monitor for complications (occur in 10-15% if illness duration >2 weeks): gastrointestinal bleeding, intestinal perforation, typhoid encephalopathy 1
- Consider adding corticosteroids in severe cases with toxic/delirious state 1
Diagnostic Considerations
- Blood cultures have highest yield within first week of symptoms (sensitivity 40-80%) 1
- Stool and urine cultures become positive after first week 1
- Do not use the Widal test - it lacks sensitivity and specificity 1
- Newer rapid serological tests (Typhidot, Tubex) show mixed results 1
Resistance Pattern Recognition
The global landscape has shifted dramatically:
- South Asia: >90% fluoroquinolone resistance 4, 2
- Pakistan: Extensively drug-resistant (XDR) strains emerging 5, 6
- Some regions: Re-emergence of chloramphenicol sensitivity 5
This makes geographic travel history essential for antibiotic selection.