Metagenomic arbovirus detection using MinION nanopore sequencing.

Area of Science:

• Virology
• Genomics
• Bioinformatics

Background:

• The MinION sequencer offers a portable, low-cost solution for in-field pathogen surveillance.
• Metagenomic sequencing enables non-targeted detection of viral agents in biological samples.
• Arboviruses, transmitted by arthropods, pose significant public health challenges.

Purpose of the Study:

• To evaluate the MinION sequencer's capability for metagenomic detection and characterization of an arbovirus directly from an infected mosquito.
• To assess the accuracy and efficiency of MinION sequencing for viral genome recovery compared to a standard platform.

Main Methods:

• RNA extraction from a Ross River virus (RRV)-infected Aedes notoscriptus mosquito.
• Conversion of RNA to cDNA.
• Metagenomic sequencing using the MinION platform.
• Bioinformatic analysis of sequencing reads for viral genome assembly.
• Comparative sequencing using the MiSeq platform.

Main Results:

• Successful detection of full-length Ross River virus (RRV) using MinION metagenomic sequencing.
• Identification of RRV genome with >98% accuracy, comparable to MiSeq.
• Demonstration of minimal sample purification required for effective detection.
• Utilization of long reads (up to 2.5kb) for genome assembly.

Conclusions:

• The MinION is a viable tool for in-field metagenomic detection and characterization of arboviruses in mosquitoes.
• This approach facilitates rapid surveillance and identification of viral threats directly at the source.
• The study validates the use of portable sequencing technology for entomological and virological investigations.