Related Experiment Video
Updated: Jun 22, 2026
06:34
Identification of Rare Bacterial Pathogens by 16S rRNA Gene Sequencing and MALDI-TOF MS
Published on: July 11, 2016
Comparison of molecular typing methods applied to Clostridium difficile
Ed J Kuijper1, Renate J van den Berg, Jon S Brazier
1Reference Laboratory for Clostridium difficile, Medical Microbiology Department, LUMC, Leiden, The National Institute for Public Health and Environment, Bangkok, Bilthoven, The Netherlands.
Methods in Molecular Biology (Clifton, N.J.)
|June 13, 2009
Summary
Molecular typing methods are crucial for understanding Clostridium difficile infection (CDI) epidemiology. Multilocus variable number of tandem repeats analysis offers the highest discrimination for tracking this nosocomial pathogen.
Area of Science:
- Microbiology
- Epidemiology
- Molecular Biology
Background:
- Clostridium difficile infection (CDI) epidemiology has been studied using various typing methods since the 1980s.
- Effective epidemiological studies require typing methods with high discriminatory power, typeability, and reproducibility.
- Molecular typing methods offer advantages over phenotypic methods due to genomic marker stability and higher typeability.
Purpose of the Study:
- To review and compare molecular typing methods for Clostridium difficile.
- To identify the most effective methods for both rapid outbreak detection and long-term epidemiological surveillance of CDI.
Main Methods:
- Review of molecular typing techniques applied to Clostridium difficile.
- Comparison of methods based on discriminatory power, typeability, and reproducibility.
- Highlighting PCR ribotyping and Multilocus Variable Number of Tandem Repeats (MLVA) analysis.
Main Results:
- PCR ribotyping is a common method for early detection of CDI outbreaks.
- Methods like multilocus sequence typing, MLVA, and amplified fragment length polymorphism are valuable for long-term epidemiological studies.
- PCR ribotyping is currently the benchmark for global CDI typing studies.
Conclusions:
- Multilocus Variable Number of Tandem Repeats (MLVA) analysis is the most discriminative typing method currently available for C. difficile.
- Advanced molecular typing methods like MLVA will significantly enhance the understanding of CDI epidemiology.
- Accurate typing is essential for controlling the spread of this significant nosocomial pathogen.
Related Concept Videos
01:29Modern Molecular Taxonomy
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
01:28Methods of Classification and Identification
Bacterial identification relies on a diverse array of techniques to classify and understand microorganisms, each tailored to uncover specific characteristics. Traditional morphological approaches, while still valuable, are limited for closely related or structurally simple organisms. Modern methods integrate biochemical, serological, genetic, and advanced molecular tools to achieve greater accuracy.Morphological and Biochemical TechniquesMorphological characteristics, such as cell shape and...
01:20Applications of Molecular Taxonomy
Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
01:25Rapid Identification of Pathogens
MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...
01:24Automated Microbial Diagnostics
Automated diagnostic analyzers have transformed clinical microbiology by providing rapid and reliable methods for pathogen identification and antibiotic susceptibility testing. Among these systems, the Vitek 2 is widely used because it automates the traditionally labor-intensive processes of microbial identification (ID) and antibiotic susceptibility testing (AST), delivering standardized and timely results that are essential for effective patient care.Microbial Identification with ID CardsThe...
01:30Methods to Assess Microbial Populations
Assessing microbial populations is crucial for understanding microbial roles in health, ecology, and industry. Various complementary techniques—both culture-based and molecular—enable detailed analysis of microbial abundance, diversity, and function.Viable Plate CountThe viable plate count is a traditional culture-based method used to estimate the number of living microbes in a sample. After serial dilution, the sample is spread onto nutrient agar plates. Each viable cell forms a visible...