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Typhoid and paratyphoid fever

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Severe enteric fever or intestinal catastrophe

Shock, encephalopathy, gastrointestinal haemorrhage, peritonism, ileus, perforation, severe hepatitis or rapidly progressive organ dysfunction indicates complicated typhoid or paratyphoid fever.

Action: Use ABCDE, collect blood cultures rapidly, begin specialist-directed intravenous therapy based on travel resistance, obtain urgent abdominal imaging and involve infection, surgery, critical care and the local health-protection team.

Synopsis

Recognise enteric fever after travel, obtain cultures before antimicrobial exposure, treat according to severity and resistance and coordinate notification, exclusion and clearance with UK health protection.

  • Suspect enteric fever in a returning traveller with sustained fever, headache, malaise and abdominal symptoms, even when diarrhoea is absent.
  • Ask exact countries, dates, urban or rural exposure, food and water, visiting friends and relatives, vaccination and every antibiotic taken abroad.
  • Obtain multiple blood-culture sets before antibiotics; blood culture is the practical first-line diagnostic test early in illness.

Key red flags

Peritonism, sudden worsening abdominal pain or free air suggests ileal perforation requiring emergency surgery.

Severe neurological disease

Delirium, encephalopathy, meningism or reduced consciousness indicates complicated illness and mandates urgent hospital treatment.

Investigation priorities

01
Multiple blood-culture setsFirst step

Recover S Typhi or Paratyphi and determine susceptibility before antimicrobial exposure.

Management branches

CULTURESecure diagnosis before treatment

A traveller has sustained fever and an exposure pattern compatible with typhoid or paratyphoid.

  1. Use immediate travel and malaria assessment, examine for shock, encephalopathy, bleeding and peritonism and begin enteric isolation precautions.
  2. Obtain several blood-culture sets, stool culture, full blood count, renal and liver profile before antibiotics when this causes no dangerous delay.
UNCOMPLICATEDUse susceptibility-directed oral therapy

The patient is stable, can absorb tablets, has no complication and resistance risk is addressed.

Key medicines

Ceftriaxone for severe susceptible enteric feverGive 2 g intravenously once daily for 10 to 14 days in severe typhoid or paratyphoid when susceptibility is expected or confirmed, with exact duration set clinically.
Azithromycin for uncomplicated enteric feverGive 500 mg orally once daily for seven days when a stable adult has uncomplicated susceptible-pattern infection and the specialist pathway selects azithromycin.
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Sources and review status4 sources · checked 27 Aug 2026 · clinical review pending
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom