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Sensitive poliovirus detection using nested PCR and nanopore sequencing: a prospective validation study.

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This summary is machine-generated.

Direct molecular detection and nanopore sequencing (DDNS) offers faster poliovirus detection in the Democratic Republic of the Congo. This method confirmed poliovirus cases and outbreaks significantly quicker than traditional methods, aiding eradication efforts.

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Area of Science:

  • Virology
  • Molecular Biology
  • Public Health

Background:

  • Poliovirus eradication requires timely outbreak detection, but current gold standard methods in the Democratic Republic of the Congo have a median detection time of 30 days.
  • Direct molecular detection and nanopore sequencing (DDNS) presents a promising alternative for rapid poliovirus identification in stool samples.

Purpose of the Study:

  • To prospectively evaluate the performance of DDNS for poliovirus detection in stool samples from suspected polio cases and contacts in the Democratic Republic of the Congo.
  • To compare the speed and accuracy of DDNS with the gold standard detection methods.

Main Methods:

  • Prospective testing of stool samples from suspected polio cases and contacts using DDNS.
  • Comparison of DDNS results with gold standard methods including cell culture, quantitative PCR, and Sanger sequencing.
  • Analysis of detection times and sequence similarity between the two methods.

Main Results:

  • DDNS detected polioviruses in 2.7% of samples (62/2,339), compared to 2.2% (51/2,339) by the gold standard.
  • DDNS provided case confirmation in a median of 7 days under routine surveillance.
  • DDNS enabled earlier confirmation of three serotype 2 circulating vaccine-derived poliovirus outbreaks by a mean of 23 days (range 6-30 days).
  • Mean sequence similarity between DDNS and gold standard methods was 99.98%.

Conclusions:

  • DDNS is a feasible and effective method for rapid poliovirus detection in national laboratories.
  • The implementation of DDNS can significantly accelerate outbreak detection and response, contributing to poliovirus eradication efforts.
  • DDNS offers a substantial improvement in turnaround time compared to traditional poliovirus detection methods.