Related Experiment Video
Updated: May 14, 2026

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
Published on: October 16, 2013
Effectiveness of flexible gastrointestinal endoscope reprocessing.
Maíra Marques Ribeiro1, Adriana Cristina de Oliveira, Silma Maria Cunha Pinheiro Ribeiro
1Service of Epidemiology and Safety Assistance, Hospital Unimed, Belo Horizonte, Brazil. mairamarquesribeiro@yahoo.com.br
Endoscope reprocessing is often ineffective, leading to significant contamination with bacteria, fungi, and mycobacteria. This study found that most services had contaminated endoscopes, exposing patients to pathogens during gastrointestinal endoscopy.
Area of Science:
- Infection Control
- Medical Device Reprocessing
- Gastroenterology
Background:
- Endoscopes require meticulous reprocessing to prevent patient-to-patient transmission of infections.
- Inadequate reprocessing practices pose a significant risk in healthcare settings.
Purpose of the Study:
- To evaluate the effectiveness of endoscope reprocessing practices across multiple healthcare services.
- To identify the prevalence of endoscope contamination and associated pathogens.
Main Methods:
- A cross-sectional evaluation of endoscope reprocessing in 37 healthcare services.
- Microbiological sampling and analysis of reprocessed endoscopes, including colonoscopes and gastroscopes.
- Assessment of adherence to recommended reprocessing guidelines.
Main Results:
- Contamination was identified in 91.6% of the evaluated services.
- Bacteria, fungi, and/or mycobacteria were isolated from 84.6% of colonoscopes and 80.6% of gastroscopes.
- Significant microbial loads (CFUs/mL) were detected, indicating potential infectious risk.
Conclusions:
- Current endoscope reprocessing practices are frequently inadequate, failing to eliminate microbial contamination.
- Non-adherence to guidelines contributes to the high rates of contaminated endoscopes.
- Patients undergoing gastrointestinal endoscopy are exposed to a diverse range of pathogens due to ineffective reprocessing.
Related Concept Videos
Endoscopic Procedures V: ERCP
Patient...
Endoscopic Procedures III: Video Capsule Endoscopy
Endoscopic Procedures I: Esophagogastroduodenoscopy
During an EGD, the endoscope can be used to:
Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy
Sigmoidoscopy
Sigmoidoscopy is a diagnostic procedure that uses a flexible sigmoidoscope equipped with a light source and camera to examine the rectum and sigmoid colon. The procedure involves inserting the tube through the anus...

