Typhoid Fever Management and Prevention

Diagnostic Investigations

Blood cultures have a sensitivity of 40-80% and are essential for diagnosis, with the highest sensitivity in the first week, according to the Journal of Infection 1, 2, 3
Bone marrow culture has a higher sensitivity than blood culture, with a sensitivity of 35-65% vs blood culture, as reported by the Journal of Infection 1
Full blood count is useful for looking for lymphopenia and thrombocytopenia, which are common in typhoid, as noted by the Journal of Infection 2, 4
Urea and electrolytes and liver function tests are essential baseline tests, as recommended by the Journal of Infection 2, 4
Malaria film and rapid diagnostic test are mandatory in all febrile travelers from tropical areas to exclude malaria, according to the Journal of Infection 2, 4

The Journal of Infection recommends intravenous ceftriaxone as the first-line agent, especially for patients from Asia where >70% of isolates are fluoroquinolone-resistant 1, 3
Treatment duration should be 14 days to reduce relapse risk, as suggested by the Journal of Infection 1, 3
Steroids should be considered in severe cases, according to the Journal of Infection 1, 3
Azithromycin is a suitable oral alternative if fluoroquinolone resistance is confirmed, with a relapse rate <3%, as reported by the Journal of Infection 1, 3
Fluoroquinolones should only be used if nalidixic acid sensitivity is confirmed, with an average fever clearance <4 days, cure rates >96%, and relapse rates <8%, as noted by the Journal of Infection 1, 3

The Centers for Disease Control and Prevention recommends typhoid vaccines, which offer 50-80% protection, as reported by Clinical Infectious Diseases and MMWR Recommendations and Reports 5, 6
Oral Ty21a vaccine is recommended for immunocompetent persons ≥6 years, with a booster every 5 years, as suggested by Clinical Infectious Diseases and MMWR Recommendations and Reports 5, 6
Vi-polysaccharide vaccine is recommended for persons ≥2 years, with a booster every 2 years, as noted by Clinical Infectious Diseases 5
Vaccination is indicated for travelers to moderate-high risk areas, household contacts of chronic carriers, and laboratory personnel, as recommended by Clinical Infectious Diseases 5
Avoiding high-risk foods and beverages in endemic areas, hand hygiene, and safe water and sanitation infrastructure are critical for prevention, as suggested by Clinical Infectious Diseases 5
Typhoid is a notifiable disease and should be reported to the appropriate health department with isolate submission, as recommended by Clinical Infectious Diseases 5

Most tropical infections become symptomatic within 21 days of exposure, as reported by the Journal of Infection 2, 4, 7
Early treatment results in better outcomes than delayed treatment, as noted by Praxis Medical Insights 3