Development of a molecular method to identify hepatitis E virus in water

Area of Science:

• Virology
• Molecular Biology
• Environmental Science

Background:

• Hepatitis E virus (HEV) is a significant cause of infectious hepatitis globally.
• HEV transmission is primarily linked to contaminated water sources.
• Accurate detection of diverse HEV strains is crucial for public health surveillance.

Purpose of the Study:

• To develop and optimize a sensitive reverse transcription-polymerase chain reaction (RT-PCR) assay.
• To ensure the assay can detect all known HEV strains, including diverse variants.
• To validate the assay's performance in detecting HEV in environmental water samples.

Main Methods:

• Sequence analysis of multiple HEV isolates to inform assay design.
• Development and optimization of a novel RT-PCR method.
• Construction of internal controls to monitor for PCR inhibition.
• Testing the assay with low levels of five diverse HEV variants.
• Analysis of virus-spiked environmental water samples.

Main Results:

• The developed RT-PCR method demonstrated the ability to identify all known HEV strains.
• The assay successfully detected low concentrations of five diverse HEV variants under laboratory conditions.
• Internal controls effectively identified potential PCR inhibition.
• The method proved successful in detecting HEV in spiked environmental water samples.

Conclusions:

• A robust and sensitive RT-PCR assay for HEV detection has been established.
• The assay is capable of identifying diverse HEV strains and is suitable for environmental water testing.
• This method provides a valuable tool for monitoring HEV contamination in water sources and supporting public health efforts.