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Whipple's Disease and Interleukins / Lysosomal Storage Disorders Research · Journal article
Diagnostics · July 23, 2026
Early or partial results. Treat as a signal, not a conclusion.
This is a case report of concurrent Tropheryma whipplei and Mycobacterium szulgai infection in a 75-year-old woman, confirmed by histopathology and acid-fast staining, with clinical improvement after antimicrobial therapy. The significance of the coinfection remains uncertain, and the hypothesised mechanism of macrophage dysfunction lacks supporting evidence.
Case report. A 75-year-old woman with type 2 diabetes mellitus presenting to clinical care with chronic diarrhoea and unintentional weight loss.. Intervention: Antimicrobial therapy (specific regimen not detailed in source).. n = 1.
Patient presented with chronic diarrhoea and 15 kg unintentional weight loss over 6 months Duodenal biopsy showed periodic acid–Schiff-positive, diastase-resistant material consistent with Whipple disease Ziehl–Neelsen staining demonstrated acid-fast bacilli confirming concomitant Mycobacterium szulgai infection
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This case alerts clinicians to the rare possibility of concurrent Whipple disease and nontuberculous mycobacterial infection, and the importance of acid-fast staining when Whipple disease is suspected. However, the coinfection mechanism remains speculative and requires further investigation before clinical practice implications can be drawn.
A single case report with clinical outcome, describing a rare diagnostic finding without comparative data, control group, or mechanistic evidence to support causal claims.
As stated by the source record.
Quoted from the source exactly as published.
This case alerts clinicians to the rare possibility of concurrent Whipple disease and nontuberculous mycobacterial infection, and the importance of acid-fast staining when Whipple disease is suspected. However, the coinfection mechanism remains speculative and requires further investigation before clinical practice implications can be drawn.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
Whipple disease is a rare systemic infection caused by Tropheryma whipplei that often presents with nonspecific gastrointestinal symptoms and may mimic other disorders. We report the case of a 75-year-old woman with type 2 diabetes mellitus who presented with chronic diarrhoea and a 15 kg unintentional weight loss over 6 months despite preserved appetite. Laboratory investigations revealed iron-deficiency anaemia, hypoproteinaemia, mild inflammatory and liver function abnormalities, and peripheral eosinophilia. Extensive infectious, autoimmune, and gastrointestinal investigations were unrevealing. Abdominal computed tomography demonstrated mesenteric lymphadenopathy, raising suspicion for lymphoma. Histopathological examination of duodenal biopsies revealed numerous foamy macrophages containing periodic acid–Schiff-positive, diastase-resistant granular material, consistent with Whipple disease. Ziehl–Neelsen staining additionally demonstrated acid-fast bacilli, and subsequent investigations confirmed concomitant Mycobacterium szulgai infection. The significance of this finding remains uncertain, as it may represent either true coinfection or incidental colonisation. A potential explanation is that T. whipplei-induced macrophage dysfunction creates a permissive intracellular niche for nontuberculous mycobacteria, although supporting evidence is lacking. Following antimicrobial therapy, the patient experienced marked clinical improvement with resolution of symptoms and an 8 kg weight gain. This case highlights the diagnostic challenges of Whipple disease and the need to consider concomitant mycobacterial infection when acid-fast organisms are identified.
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