Typhoid Fever - General Treatment

Overview

General/Supportive Care

• Uncomplicated cases can be managed at home with oral antibiotics + antipyretics.
• Hospitalization is indicated for patients with persistent vomiting, diarrhea, or abdominal distension; these patients need parenteral antibiotics and IV fluids.
• Supportive care: IV rehydration, blood transfusion if significant GI losses occur, nutritional support.
• Treatment duration: at least 10 days or 5 days after fever resolution, whichever is longer. - Harrison's, p. 1361

Antibiotic Therapy

Harrison's Antibiotic Table (Adults)

• Harrison's Principles of Internal Medicine 22E, Table 171-1, p. 1361

Park's Treatment Table (for Uncomplicated Typhoid - all ages)

• Park's Textbook of Preventive and Social Medicine, Table 1, p. 279

Drug Resistance - Key Warnings

• Multidrug-resistant (MDR) strains: resistant to chloramphenicol, ampicillin, and TMP-SMX. Treat with fluoroquinolone or third-generation cephalosporin.
• Quinolone-resistant strains: increasingly common from South Asia. Avoid fluoroquinolones empirically in travelers from this region. Use azithromycin or ceftriaxone.
• XDR S. Typhi (Pakistan, since 2016): resistant to ceftriaxone, ampicillin, ciprofloxacin, and TMP-SMX. Only azithromycin and carbapenems remain active. Over 5,000 cases documented; multiple cases exported to the US and UK. - Red Book 2021, p. 1023
• The AAP Red Book advises: clinicians should NOT use fluoroquinolones as empiric therapy, especially in travelers from South Asia.

Severe/Complicated Typhoid

• Dexamethasone (corticosteroids) for critically ill patients with shock, delirium, obtundation, stupor, or coma:
  • Initial dose: 3 mg/kg IV, then 1 mg/kg IV q6h for 48 hours total (8 doses following the loading dose)
  • First shown to reduce mortality from 55% to 10% in a landmark Indonesian RCT (chloramphenicol era). Still recommended for severe disease.
  • Steroid treatment beyond 48 hours may increase relapse rate. - Harrison's, p. 1361; Red Book 2021, p. 1024
• GI complications (perforation ~1%, bleeding ~6%): require immediate fluid resuscitation, surgical intervention, broadened antibiotic coverage for polymicrobial peritonitis. - Harrison's, p. 1360

Chronic Carrier Treatment

• 2-5% of typhoid patients develop chronic carriage (shedding >1 year).
• For fluoroquinolone-susceptible strains: oral ciprofloxacin x 4 weeks - eradication rate ~80%.
• For fluoroquinolone-resistant strains: oral azithromycin x 4 weeks (limited clinical data) or oral amoxicillin (if susceptible, but lower eradication rates).
• Anatomic abnormality (gallstones, bladder/kidney stones): may require both antibiotic therapy AND surgical correction. Cholecystectomy may be needed if antibiotic therapy alone fails. - Harrison's, p. 1361; Red Book 2021, p. 1024

Summary of Key Points

1. Empirical first choice (where resistance is unknown): ceftriaxone IV or azithromycin PO.
2. Avoid fluoroquinolones empirically in travelers from South/Southeast Asia due to high resistance rates.
3. Dexamethasone is one of the very few indications for steroids in acute bacterial infection - use only in critically ill patients, limited to 48 hours.
4. XDR typhoid (Pakistan-origin): only carbapenems + azithromycin remain reliably active.
5. Relapse occurs in up to 10-17% of patients, usually within 2-3 weeks of fever resolution, with the same strain and susceptibility profile.
6. Relapse rates appear lower with azithromycin than with fluoroquinolones or ceftriaxone. - Red Book 2021, p. 1024