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Related Experiment Videos

Identification and characterization of Clostridium perfringens using single target DNA microarray chip.

Sufian F Al-Khaldi1, Doralis Villanueva, Vladimir Chizhikov

  • 1HFS-517, Division of Microbiological Studies, Center for Food Safety and Applied Nutrition, Food and Drug Administration, College Park, MD 20740-3855, USA. Sufian.Al-Khaldi@cfsan.fda.gov

International Journal of Food Microbiology
|February 27, 2004
PubMed
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A novel DNA microarray method accurately identifies key toxin genes in Clostridium perfringens. This molecular diagnostic tool enables rapid detection of beta, epsilon, enterotoxin, alpha, and iota toxin genes in bacterial strains.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Genomics

Background:

  • Clostridium perfringens is an important veterinary and human pathogen.
  • Accurate identification of toxin genes is crucial for understanding pathogenicity and disease.
  • Existing methods for toxin gene detection can be time-consuming and complex.

Purpose of the Study:

  • To develop and validate a DNA microarray for the simultaneous detection of five major toxin genes in Clostridium perfringens.
  • To create a rapid and reliable molecular diagnostic tool for C. perfringens toxin gene profiling.

Main Methods:

  • Design and fabrication of a DNA chip with oligonucleotide probes for beta toxin (cpb), epsilon toxin (etx), enterotoxin (cpe), alpha toxin (cpa), and iota toxin (iA) genes.
  • Multiplex PCR amplification and fluorescent labeling (Cy3 and Cy5) of target DNA.

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  • Hybridization of denatured, single-strand labeled DNA probes to the DNA chip for detection.

    • Main Results:

    • The DNA microarray successfully identified the presence of specific toxin genes in Clostridium perfringens.
    • The method demonstrated the ability to detect multiple toxin genes simultaneously.
    • Eight strains of C. perfringens were accurately identified using the developed DNA chip.

    Conclusions:

    • The developed DNA microarray is a sensitive and specific tool for identifying toxin genes in Clostridium perfringens.
    • This method offers a rapid and efficient alternative for bacterial toxin gene profiling.
    • The DNA chip has potential applications in diagnostics and epidemiological studies of C. perfringens infections.