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Updated: Nov 10, 2025

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Method Development for Enteric Virus Recovery from Primary Sludge.

Yarrow S Linden1, Christine S Fagnant-Sperati1, Alexandra L Kossik1

  • 1Department of Environmental and Occupational Health Sciences, University of Washington, 4225 Roosevelt Way NE, Suite 100, Seattle, WA 98195, USA.

Viruses
|April 3, 2021
PubMed
Summary
This summary is machine-generated.

This study developed an improved method for concentrating enteric viruses from solid waste, like that found in pit latrines. The optimized protocol significantly enhances virus recovery, aiding public health surveillance in diverse settings.

Keywords:
disease surveillanceenteric virusesenvironmental monitoringenvironmental surveillancepoliovirussludge

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Last Updated: Nov 10, 2025

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. II. Total Culturable Virus Assay
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EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. Part III. Virus Detection by RT-qPCR
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EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. Part III. Virus Detection by RT-qPCR

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Area of Science:

  • Environmental microbiology
  • Virology
  • Public health

Background:

  • Enteric viruses cause significant mortality from gastroenteritis globally.
  • Environmental surveillance of wastewater aids in monitoring virus circulation.
  • Existing methods are often unsuitable for high-solids waste, limiting surveillance in some areas.

Purpose of the Study:

  • To develop and evaluate enteric virus concentration protocols for samples with high solids content.
  • To adapt existing methods for effective virus recovery from challenging matrices like pit latrine waste.

Main Methods:

  • Two established protocols were modified and tested using poliovirus type 1 (PV1) seeded into primary sludge.
  • Method 1 (M1) involved acid adsorption and multiple elutions with skimmed milk flocculation.
  • Method 2 (M2) used centrifugation, filtration, and elution, with solid fraction concentration.

Main Results:

  • Method 1 (M1) showed higher PV1 recovery (26.1%) compared to Method 2 (M2) (15.9%), though not statistically significant.
  • Optimization of M1 significantly increased PV1 recovery (p < 0.05) compared to its original protocol.
  • The optimized M1 protocol demonstrates effectiveness for enteric virus concentration in solid waste.

Conclusions:

  • An optimized acid adsorption and elution protocol (M1) is effective for concentrating enteric viruses from high-solids waste.
  • This method enhances understanding of enteric virus presence in communities lacking liquid wastewater systems.
  • Improved surveillance capabilities are crucial for controlling enteric virus transmission.