Clinical Presentation and Diagnosis of Typhoid Fever

Common Clinical Features

The Centers for Disease Control and Prevention recommends considering typhoid fever in patients with sustained fever, headache, malaise, anorexia, relative bradycardia, constipation or diarrhea, and nonproductive cough, though many mild and atypical infections occur 1
Fever is present in 97-100% of cases, often high-grade and sustained, according to the MMWR Recommendations and Reports 1
Malaise and myalgia are common constitutional symptoms, as reported by the Journal of Infection 2
Anorexia is a common symptom, as noted by the MMWR Recommendations and Reports 1
Vomiting is a symptom of typhoid fever, as reported by Praxis Medical Insights 3

The incubation period of typhoid fever is 7-18 days, with a range of 3-60 days, according to the Journal of Infection 2
The typical onset of typhoid fever is insidious rather than abrupt, as noted by the MMWR Recommendations and Reports 1
Disease progression can lead to perforation, typically occurring in the third week of disease if untreated, as reported by the International Journal of Infectious Diseases 4

Blood culture is the gold standard for diagnosis, with the highest yield in the first week of symptoms, as reported by Praxis Medical Insights 5
The Widal test alone is not sufficient for diagnosis, according to Praxis Medical Insights and the MMWR Recommendations and Reports 1, 5

Intestinal perforation most commonly occurs in the ileum or jejunum, as reported by the International Journal of Infectious Diseases 4
Gastrointestinal bleeding is a complication of typhoid fever, as noted by the International Journal of Infectious Diseases 4
Encephalopathy is a rare but serious complication, as reported by the MMWR Recommendations and Reports 1

Travelers from endemic areas, particularly South and Southeast Asia, are at risk of typhoid fever, as reported by Clinical Infectious Diseases and the Journal of Infection 2, 6
High-risk groups, including immunocompromised individuals, those with chronic liver disease, and malnourished children, are more susceptible to severe disease, as noted by Praxis Medical Insights 3

The highest incidence of typhoid fever is found in South and Southeast Asia, with over 100 cases per 100,000 person-years, as reported by the Journal of Infection 2
In developed countries, typhoid fever is mostly seen in returning travelers or associated with foodborne outbreaks, as noted by Clinical Infectious Diseases and the Journal of Infection 2, 6

The classic "step-ladder" fever pattern is not reliably present in all cases, as reported by the Journal of Infection 2
Absence of fever at presentation does not rule out typhoid fever if there is a history of fever, as noted by the Journal of Infection 2

The CDC guidelines recommend not missing complications, such as signs of intestinal perforation, gastrointestinal bleeding, or septic shock, which can occur in patients with typhoid fever 7
The Infectious Diseases Society of America recommends initiating empiric antibiotics after culture collection in patients with clinical features of sepsis, severe illness with documented fever ≥38.5°C in travelers from endemic areas, or signs of septic shock or encephalopathy 7

The American College of Physicians recommends empiric therapy with fluoroquinolone (ciprofloxacin) or azithromycin depending on local resistance patterns, or third-generation cephalosporin (ceftriaxone) for severe cases of typhoid fever 7