Related Experiment Videos
Clostridium difficile: clinical disease and diagnosis
F C Knoop1, M Owens, I C Crocker
1Department of Medical Microbiology, Creighton University School of Medicine, Omaha, Nebraska 68178-0001.
Abstract:
Clostridium difficile is an opportunistic pathogen that causes a spectrum of disease ranging from antibiotic-associated diarrhea to pseudomembranous colitis. Although the disease was first described in 1893, the etiologic agent was not isolated and identified until 1978. Since clinical and pathological features of C. difficile-associated disease are not easily distinguished from those of other gastrointestinal diseases, including ulcerative colitis, chronic inflammatory bowel disease, and Crohn's disease, diagnostic methods have relied on either isolation and identification of the microorganism or direct detection of bacterial antigens or toxins in stool specimens. The current review focuses on the sensitivity, specificity, and practical use of several diagnostic tests, including methods for culture of the etiologic agent, cellular cytotoxicity assays, latex agglutination tests, enzyme immunoassay systems, counterimmunoelectrophoresis, fluorescent-antibody assays, and polymerase chain reactions.
Insights
Clostridium difficile infections (CDI) cause diarrhea and colitis. This review evaluates various diagnostic methods for accurately identifying this opportunistic pathogen, aiding clinical decision-making.
Area of Science:
- Microbiology
- Infectious Diseases
- Gastroenterology
Background:
- Clostridium difficile is an opportunistic pathogen causing antibiotic-associated diarrhea and pseudomembranous colitis.
- Distinguishing C. difficile-associated disease from other gastrointestinal conditions like IBD is clinically challenging.
- Accurate diagnosis is crucial for effective patient management.
Purpose of the Study:
- To review and compare the sensitivity, specificity, and practical utility of various diagnostic tests for Clostridium difficile.
- To provide an overview of available methods for detecting C. difficile and its toxins.
Main Methods:
- The review analyzes diagnostic methods including culture, cellular cytotoxicity assays, latex agglutination, enzyme immunoassays (EIA), counterimmunoelectrophoresis (CIE), fluorescent-antibody assays (FA), and polymerase chain reaction (PCR).
- Evaluation focuses on test performance characteristics and clinical applicability.
Main Results:
- Different diagnostic tests for C. difficile exhibit varying levels of sensitivity and specificity.
- The choice of diagnostic method impacts the accuracy and timeliness of C. difficile detection.
- PCR and EIA are often favored for their sensitivity and specificity in detecting C. difficile toxins.
Conclusions:
- Accurate and timely diagnosis of Clostridium difficile infections is essential for appropriate treatment.
- Selecting the optimal diagnostic test depends on clinical context, available resources, and desired performance characteristics.
- Continued evaluation of diagnostic methodologies is important for improving patient outcomes in C. difficile infections.