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Intestinal Obstruction II: Pathophysiology

Intestinal obstruction triggers a series of physiological responses, starting with gas and fluid accumulation in the bowel segment proximal to the obstruction, leading to distension. This distended intestine compresses the diaphragm, hindering lung expansion and potentially leading to reduced respiratory effort, atelectasis, and pneumonia.To overcome the blockage, the gut intensifies contractions, causing colicky abdominal pain, nausea, and vomiting, which reduces fluid and food intake and...
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A young man with bowel obstruction and cachexia.

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Strongyloides infection can cause bowel obstruction, even without typical symptoms like diarrhea or high eosinophil counts. This parasitic infection should be considered in patients with relevant travel history or epidemiological risk factors.

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Area of Science:

  • Medical Parasitology
  • Gastroenterology
  • Infectious Diseases

Background:

  • Helminthic infections, such as Strongyloides, can lead to severe gastrointestinal complications.
  • Strongyloides stercoralis is a nematode parasite endemic in tropical and subtropical regions.
  • Co-infection with Human T-lymphotropic virus type 1 (HTLV-1) can alter the host immune response to parasitic infections.

Purpose of the Study:

  • To highlight a case of Strongyloides infection presenting as bowel obstruction.
  • To emphasize the importance of considering helminthic infections in patients with unexplained gastrointestinal symptoms.
  • To discuss the potential role of HTLV-1 positivity in the presentation of Strongyloides infection.

Main Methods:

  • Case report of a young man from Jamaica presenting with cachexia, epigastric pain, and vomiting.
  • Clinical examination, laboratory investigations (including anemia and hypoalbuminemia assessment), and abdominal X-ray.
  • Duodenal biopsy for histopathological examination to identify parasitic larvae and eggs.

Main Results:

  • Abdominal examination revealed hyperactive bowel sounds; laboratory tests showed mild anemia and hypoalbuminemia.
  • Abdominal X-ray demonstrated dilated and edematous bowel loops, suggestive of obstruction.
  • Duodenal biopsy confirmed Strongyloides infection by identifying larvae and eggs in the epithelium.

Conclusions:

  • Strongyloides infection can manifest as bowel obstruction, even without eosinophilia or diarrhea.
  • Diagnosis requires a high index of suspicion in patients with appropriate epidemiological backgrounds.
  • HTLV-1 positivity was noted in retrospect and may influence the clinical course of helminthic infections.