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Updated: Jun 12, 2026

Pyrosequencing for Microbial Identification and Characterization
12:37

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Published on: August 22, 2013

Identification of acid-fast bacilli using pyrosequencing analysis.

Jian R Bao1, Ronald N Master, Dale A Schwab

  • 1Department of Microbiology, Quest Diagnostics Nichols Institute, Chantilly, VA 20151, USA.

Diagnostic Microbiology and Infectious Disease
|June 15, 2010
PubMed
Summary

Pyrosequencing accurately identifies most acid-fast bacilli (AFB), including Mycobacterium and Nocardia species. This rapid molecular method offers a reliable alternative to traditional identification techniques for AFB.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Clinical Diagnostics

Background:

  • Acid-fast bacilli (AFB) are a group of medically significant bacteria.
  • Accurate and rapid identification of AFB is crucial for effective treatment and infection control.
  • Traditional phenotypic methods for AFB identification can be slow and labor-intensive.

Purpose of the Study:

  • To evaluate the accuracy and speed of pyrosequencing for identifying AFB isolates.
  • To compare pyrosequencing results with routine phenotypic methods and Sanger sequencing.
  • To assess the utility of pyrosequencing for differentiating Mycobacterium and Nocardia species.

Main Methods:

  • Pyrosequencing was performed on 117 AFB isolates using two vendor-provided primers.
  • Results were compared to conventional phenotypic identification and Sanger sequencing.
  • Specific focus on identification of Mycobacterium and Nocardia species.

Main Results:

  • Pyrosequencing correctly identified 114 (98%) of 117 AFB isolates.
  • 18 of 20 Mycobacterium species were identified to the species level, with all rapidly growing mycobacteria correctly identified.
  • All 25 Nocardia isolates were identified to the genus level; Mycobacterium simiae and Mycobacterium scrofulaceum were exceptions.

Conclusions:

  • Pyrosequencing is a rapid and highly accurate method for identifying acid-fast bacilli.
  • The method demonstrates excellent performance for most Mycobacterium and Nocardia species.
  • Pyrosequencing offers a valuable advancement in the molecular diagnostics of AFB.