Amebiasis

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Amebiasis
Diagnosis in short

Amebiasis. H&E stain.

LM entamoeba histolytica: round/ovoid eosinophilic bodies ~ 40-60 micrometers in maximal dimension; found in bowel lumen, usu. ingest (whole) red blood cells
LM DDx fecal material, necroinflammatory debris
Site colon

Associated Dx +/-liver abscess
Signs diarrhea, blood per rectum
Prevalence uncommon
Endoscopy colitis
Prognosis benign
Clin. DDx colorectal carcinoma, colitis

Amebiasis, also be spelled amoebiasis, is an infectious disease, caused by the protozoan Entamoeba histolytica.

General

May cause:[3]

Gross

Features:[4]

Microscopic

Features:

  • Entamoeba histolytica are round/ovoid eosinophilic bodies ~ 40-60 micrometers in maximal dimension.
    • Found in bowel lumen.
    • Ingest RBCs.

Image

See also

References

  1. URL: http://www.health.state.ny.us/diseases/communicable/amebiasis/fact_sheet.htm. Accessed on: 17 June 2010.
  2. Fernandes, H.; D'Souza, CR.; Swethadri, GK.; Naik, CN.. "Ameboma of the colon with amebic liver abscess mimicking metastatic colon cancer.". Indian J Pathol Microbiol 52 (2): 228-30. PMID 19332922. http://www.ijpmonline.org/article.asp?issn=0377-4929;year=2009;volume=52;issue=2;spage=228;epage=230;aulast=Fernandes.
  3. Mortimer, L.; Chadee, K. (Mar 2010). "The immunopathogenesis of Entamoeba histolytica.". Exp Parasitol. doi:10.1016/j.exppara.2010.03.005. PMID 20303955.
  4. Stuiver, PC.; Visser, LG. (Nov 1993). "[Ameboma of the large intestine and rectum].". Ned Tijdschr Geneeskd 137 (45): 2328-31. PMID 8255341.
  5. Ooi, BS.; Seow-Choen, F. (Apr 2003). "Endoscopic view of rectal amebiasis mimicking a carcinoma.". Tech Coloproctol 7 (1): 51-3. doi:10.1007/s101510300008. PMID 12750955.