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Related Experiment Videos

A handheld real time thermal cycler for bacterial pathogen detection.

James A Higgins1, Shanavaz Nasarabadi, Jeffrey S Karns

  • 1Animal Waste Pathogen Laboratory USDA-ARS, Room 202, Building 173, 10300 Baltimore Boulevard, Beltsville, MD 20705, USA. jhiggins@anri.barc.usda.gov

Biosensors & Bioelectronics
|June 6, 2003
PubMed
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The handheld advanced nucleic acid analyzer (HANAA) offers portable real-time PCR for rapid field detection of bacterial targets like E. coli and B. anthracis. This compact device enables quick identification of pathogens, enhancing field-based biological analysis.

Area of Science:

  • Biotechnology
  • Molecular Biology
  • Analytical Chemistry

Background:

  • Real-time PCR (polymerase chain reaction) is a powerful technique for nucleic acid quantification.
  • Field-deployable analytical instruments are crucial for rapid on-site detection of biological targets.
  • Existing real-time PCR systems are often benchtop-bound, limiting their use in remote or field settings.

Purpose of the Study:

  • To evaluate the performance of the handheld advanced nucleic acid analyzer (HANAA) for real-time PCR applications.
  • To assess the device's capability for detecting specific bacterial strains and genes in various sample types.
  • To determine the assay times and potential limitations of the HANAA in a field-use context.

Main Methods:

  • The handheld advanced nucleic acid analyzer (HANAA), a portable real-time thermal cycler, was utilized.

Related Experiment Videos

  • Polymerase chain reaction (PCR) assays were performed using SYBR Green dye and TaqMan probes.
  • The HANAA was tested for the detection of Escherichia coli, Bacillus anthracis, and Erwinia herbicola using specific gene targets.

    • Main Results:

    • The HANAA successfully detected E. coli strains (lacZ, Tir genes) in under 30 minutes, though with some background fluorescence.
    • Detection of Bacillus anthracis (vrrA, capA genes) was achieved in 32 and 22 minutes, respectively.
    • Rapid detection of Erwinia herbicola (aroQ gene) was observed in 7 minutes with negligible background fluorescence using a TaqMan probe.

    Conclusions:

    • The handheld advanced nucleic acid analyzer (HANAA) provides a unique, portable solution for real-time PCR in field settings.
    • The device demonstrates effectiveness in the rapid detection of various bacterial pathogens.
    • Further development and commercial availability enhance its potential for field-based biological surveillance and diagnostics.