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Related Experiment Videos

A reverse transcriptase-polymerase chain reaction assay for detecting Highlands J virus.

C A Whitehouse1, A Guibeau, D McGuire

  • 1Center for Vector-Borne Disease, University of Rhode Island, Kingston 02881, USA.

Avian Diseases
|September 25, 2001
PubMed
Summary

A new reverse transcriptase (RT)-polymerase chain reaction (PCR) assay accurately detects Highlands J (HJ) virus. This molecular method improves surveillance for eastern equine encephalitis (EEE) and monitors avian infections.

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Area of Science:

  • Veterinary Virology
  • Molecular Diagnostics
  • Arbovirology

Background:

  • Highlands J (HJ) virus is an arbovirus prevalent in Eastern US mosquitoes, posing a threat to domestic birds.
  • Existing immunologic techniques for HJ virus detection are inefficient and prone to cross-reactivity.
  • HJ virus shares an enzootic cycle with eastern equine encephalitis (EEE) virus, making it an important surveillance indicator.

Purpose of the Study:

  • To develop a sensitive and specific molecular diagnostic assay for Highlands J virus.
  • To improve the accuracy and efficiency of HJ virus detection in various sample types.
  • To enhance arbovirus surveillance programs and avian disease monitoring.

Main Methods:

  • Development of a reverse transcriptase (RT)-polymerase chain reaction (PCR) assay using primers targeting the E1 coding region of HJ virus.

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  • Testing the assay's sensitivity with serial dilutions of HJ virus-infected cell culture.
  • Evaluating the assay's specificity against related arboviruses and direct detection in field samples.

    • Main Results:

    • The developed RT-PCR assay demonstrated high sensitivity, detecting viral RNA at concentrations as low as 10 plaque-forming units/reaction.
    • The assay showed high specificity, with no cross-reactivity observed with western equine encephalitis, EEE, LaCrosse, or Jamestown Canyon viruses.
    • Successful detection of HJ virus RNA was achieved directly from infected bird brain tissue and field-collected mosquitoes.

    Conclusions:

    • The novel RT-PCR assay provides a rapid, sensitive, and specific method for HJ virus diagnosis.
    • This molecular tool will significantly improve HJ virus surveillance, aiding EEE risk assessment.
    • The assay facilitates accurate monitoring of HJ virus infections in domestic poultry and wild bird populations.