Related Experiment Video
Updated: Jun 26, 2026

Detection of Enterohemorrhagic Escherichia Coli Colonization in Murine Host by Non-invasive In Vivo Bioluminescence System
Published on: April 9, 2018
Enteric infections and diagnostic testing
William E Bennett1, Phillip I Tarr
1Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
Purpose Of Review:
Gastrointestinal pathogens profoundly affect human health and well being. The provider's ability to render optimal care often highly depends on diagnostic microbiologic support. We aim to provide a clinically pertinent assessment of the current state of our ability to diagnose human gastrointestinal pathogens and describe (and decry) the unsophistication of many current diagnostic methods and strategies.
Recent Findings:
Recent advances involve improved stool polymerase chain reaction assays and application of this technology to a broader panel of pathogens, stool antigen assays, and improved culture techniques, but there is little penetration of such diagnostic advances into clinical practice. Many such techniques remain limited to research or epidemiologic use and are not typically available in the clinical laboratory.
Summary:
Multiple clinical and laboratory factors need to be considered when attempting to diagnose the wide variety of gastrointestinal pathogens afflicting humans. Careful interpretation of diagnostic tests with attention to the population studied and the characteristics of each test is necessary.
Insights
Diagnosing gastrointestinal pathogens requires advanced methods like polymerase chain reaction (PCR) and antigen assays. However, these sophisticated diagnostic tools are not yet widely used in clinical practice.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Clinical Diagnostics
Background:
- Gastrointestinal pathogens significantly impact human health.
- Effective patient care relies heavily on accurate microbiologic diagnostic support.
- Current diagnostic methods for gastrointestinal pathogens are often unsophisticated.
Purpose of the Study:
- To assess the current capabilities in diagnosing human gastrointestinal pathogens.
- To critically evaluate existing diagnostic methods and strategies.
- To highlight the gap between advanced diagnostics and clinical application.
Main Methods:
- Review of recent advances in diagnostic technologies.
- Analysis of the clinical utility and accessibility of new diagnostic assays.
- Evaluation of factors influencing diagnostic test interpretation.
Main Results:
- Improved stool polymerase chain reaction (PCR) assays and stool antigen tests show promise.
- Advanced techniques are often confined to research or epidemiology, not routine clinical labs.
- Limited adoption of advanced diagnostic technologies in clinical practice was observed.
Conclusions:
- Diagnosing diverse gastrointestinal pathogens necessitates considering multiple clinical and laboratory factors.
- Careful interpretation of diagnostic tests, population data, and test characteristics is crucial.
- Bridging the gap between research advancements and clinical implementation is needed.
Related Concept Videos
Urinary Tract Infection III: Diagnostic Studies and Interprofessional Care
Urine Studies II: Urine Culture and Sensitivity Test
Acute Pyelonephritis II: Diagnostic Studies and Management
Automated Microbial Diagnostics
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 colonic...

