D.fragilis intro.
Lab testing
Symptoms
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Medical mismanagement
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There are few, if any convincing arguments against the potential pathogenicity of D.fragilis.
Numerous epidemiological and clinical studies around the world have substantiated its significance as an enteropathogen in both children & adults. Therefore, it is inexcusable that so few laboratories attempt to identify this parasite, and it is illogical when one considers that D.fragilis, unlike those of Cryptosporidium parvum, can be treated effectively with a number of chemotherapeutic agents.

D.fragilis: the unflagellated human flagellate

Jeffrey J. Windsor and Eugene H. Johnson
British Journal of Biomedical Science
1999; 56: 293-306


"My gastro. eventually came around to say only in 'rare' cases is df a pathogen and he's never seen it in all his 25 years"
E-mailed by 'S' from USA
17 July 2003

"My gastroenterologist has spoken to a few other people in the field and they do not think D.fragilis is a problem."
Australian microbiologist diagnosed with D.fragilis.
October 2004


Read cases of
Medical Mismanagement & Delayed Diagnosis.


Ever since its first description in 1918, Dientamoeba fragilis has struggled to gain recognition as a significant pathogen. There is little justification for this neglect, however, since there exists a growing body of case reports from numerous countries around the world that have linked this protozoal parasite to clinical manifestations such as diarrhea, abdominal pain, flatulence, and anorexia. A number of studies have even incriminated D. fragilis as a cause of irritable bowel syndrome, allergic colitis, and diarrhea in human immunodeficiency virus patients."
Emerging from Obscurity: Biological, Clinical, and Diagnostic Aspects of Dientamoeba fragilis Eugene H. Johnson, Jeffrey J. Windsor, and C. Graham Clark
Clinical Microbiology Reviews, July 2004, p. 553-570, Vol. 17, No. 3

Find out:

about the numerous published studies spanning decades which documents how this parasite can cause mild symptoms to chronic illness.

about the type of stool collection and testing methods vital for accurate diagnoses of a D..fragilis infection - testing methods which are not a routine part of medical practice, and how inadequate testing has resulted in decades of missed infections.

how a D.fragilis infection is often dismissed as an Irritable Bowel Syndrome (IBS), stress or a psychiatric disorder.

how low levels of detection, combined with the ongoing medical debate over D.fragilis' ability to cause symptoms, has resulted in infections which often remain undetected for years. For examples read medical mismanagment, delayed disagnoses, and the author's own seven year battle to have her infection recognised as causing her chronic illness - in "my story")