A simple and efficient method for detecting avian influenza virus in water samples

Area of Science:

• Environmental Virology
• Molecular Biology
• Water Quality Monitoring

Background:

• Waterborne transmission is a significant route for avian influenza virus (AIV) spread.
• Conventional detection methods struggle with the extremely low abundance of AIV in environmental water.
• Concentration steps are crucial for detecting viral RNA using reverse transcription (RT-) PCR.

Purpose of the Study:

• To develop an efficient method for concentrating influenza viruses from water samples.
• To improve the detection sensitivity of influenza virus genomic RNA in natural water.
• To reduce the time required for sample preparation in viral detection.

Main Methods:

• Utilized an electropositive filter membrane for concentrating influenza viruses.
• Employed a glass fiber filter for prefiltration of water samples.
• Applied Trizol-LS reagent for direct lysis of viruses on the filter membrane.
• Extracted viral genomic RNA for subsequent RT-PCR analysis.

Main Results:

• The developed method effectively concentrated influenza viruses from water samples.
• Enhanced the efficiency of conventional RT-PCR for detecting M, NP, and HA genes of influenza virus.
• Significantly reduced the processing time compared to traditional adsorption-elution methods.

Conclusions:

• The novel electropositive filtration and direct lysis method improves influenza virus detection in environmental water.
• This technique offers a more efficient and faster approach for avian influenza surveillance in water bodies.
• The findings contribute to better monitoring and control strategies for waterborne avian influenza.