Synopsis
Recognise Whipple disease and travel-related malabsorption without collapsing them into a single tropical diagnosis, select tissue, molecular and stool tests with microbiology, and begin prolonged organism-specific therapy only with infection and gastroenterology expertise using current reference-laboratory, UKHSA, BNF and local imported-infection guidance.
- Classic Whipple disease is caused by Tropheryma whipplei and often presents with years of migratory seronegative arthralgia before weight loss, diarrhoea, abdominal pain, nodes or systemic disease.
- Neurological, ocular and culture-negative endocarditis presentations can occur without obvious diarrhoea; cognitive change, supranuclear gaze disorder or oculomasticatory movements are high-risk clues.
- Duodenal histology with PAS-positive macrophages plus organism-specific PCR on appropriately chosen samples supports diagnosis; stool or saliva PCR alone can reflect carriage.
Key red flags
Cognitive or behavioural change, ataxia, hypothalamic features, supranuclear gaze palsy, myoclonus or oculomasticatory movements requires urgent CNS-aware diagnostic and treatment planning.
Investigation priorities
Obtain multiple proximal and distal duodenal biopsies for PAS staining and pathology when classic Whipple or another enteropathy is suspected.
Management branches
Arthralgia plus malabsorption, neurological disease or culture-negative endocarditis makes T. whipplei plausible.
- Stop diagnostic anchoring, review prior immunosuppression and involve gastroenterology, infection or microbiology and the organ-specific team.
- Obtain duodenal histology and reference PCR from the most informative compartments before antibiotics when safe, without delaying treatment for unstable CNS or cardiac disease.