Related Experiment Video
Updated: Mar 10, 2026

Detection of Tissue-resident Bacteria in Bladder Biopsies by 16S rRNA Fluorescence In Situ Hybridization
Published on: October 18, 2019
Intestinal Bacterial Infection Diagnosed by Histological Examination of Endoscopic Biopsy Specimens
Michiko Yuki1, Yuko Emoto1, Katsuhiko Yoshizawa1
1Department of Pathology II, Kansai Medical University, Hirakata, Japan.
Abstract:
Intestinal spirochetosis (IS) in humans is characterized by spirochetal microorganisms attached to the luminal surface of the colonic epithelium. In the present case, attached organisms appeared as 3- to 4 μm-thick (average thickness, 3.4 μm) basophilic fringes or haze in HE-stained endoscopic biopsy specimens. The basophilic fringes were clearly labeled by Treponema pallidum antiserum. Because IS is relatively rare in developed countries, thin basophilic fringes characteristic of IS are readily overlooked. Thus, the recognition of histological characteristics of this disease is important for its diagnosis.
Insights
Intestinal spirochetosis (IS) is a rare condition where spirochetal bacteria attach to the colon
Area of Science:
- Gastroenterology
- Microbiology
- Histopathology
Background:
- Intestinal spirochetosis (IS) is a colonic infection by spirochetal microorganisms.
- IS is characterized by bacteria adhering to the colonic epithelium's surface.
Observation:
- In a specific case, IS presented as 3-4 μm thick basophilic fringes on HE-stained biopsy specimens.
- These fringes were identified as spirochetes using Treponema pallidum antiserum.
Findings:
- The histological appearance of IS can be subtle, resembling thin basophilic fringes or haze.
- These characteristic findings are crucial for accurate diagnosis, especially in regions where IS is uncommon.
Implications:
- Recognizing the histological features of IS is vital for its diagnosis.
- Increased awareness can prevent misdiagnosis or delayed diagnosis of this condition.
More Related Videos
11:15In Situ Detection of Bacteria within Paraffin-embedded Tissues Using a Digoxin-labeled DNA Probe Targeting 16S rRNA
Published on: May 21, 2015
09:31Visualization of Gut Microbiota-host Interactions via Fluorescence In Situ Hybridization, Lectin Staining, and Imaging
Published on: July 9, 2021
Related Concept Videos
Peptic Ulcer Disease III: Clinical Manifestations and Diagnostic Studies
Few clinical manifestations differentiate gastric ulcers from duodenal ulcers. Distinctions in the location, timing, and pain relief are crucial for healthcare providers in differentiating between gastric and duodenal ulcers during clinical assessments.
Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy
Diagnostic studies
A colonoscopy is the definitive screening test, distinguishing ulcerative colitis from other colon diseases with similar symptoms. During a colonoscopy test, inflamed mucosa with exudate ulcerations can be observed, and biopsies are taken to determine the histologic characteristics of the...