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COVID-19

Wastewater Surveillance for COVID-19: Key Findings and Implications

Strategic Insights

— 1 min read

A new study published in the Microorganisms journal has revealed insights into the effectiveness of wastewater surveillance for tracking the spread of COVID-19 on a university campus. The research, conducted by a team of investigators from the North Carolina Agricultural and Technical State University, monitored the prevalence of SARS-CoV-2 in wastewater samples collected from 11 manholes on campus over a three-year period (2021-2023). The study found a strong positive correlation between grab and composite sampling methods, indicating that both approaches are equally effective for sample collection.

Key Takeaways:

  • The study monitored the prevalence of SARS-CoV-2 in wastewater samples collected from 11 manholes on a university campus over a three-year period (2021-2023).
  • A strong positive correlation was observed between grab and composite sampling methods, supporting their robustness as equally effective approaches for sample collection.
  • Higher viral RNA copies of SARS-CoV-2 (N1 gene) were detected during the Spring semester compared to the Fall and Summer semesters.
  • Elevations in raw N1 concentrations were observed shortly after the return of college students to campus, suggesting that these increases were predominantly associated with students returning at the beginning of the Fall and Spring semesters.
  • Normalization using Pepper Mild Mottle Virus (PMMoV) did not improve correlations between SARS-CoV-2 RNA levels and clinical case data.

Statistics:

  • The study collected 231 wastewater samples over the three-year period.
  • A strong correlation was observed between Aggie Village 4 Grab and Aggie Village 4 Composite samples (R2 = 0.84, p = 0.00).
  • A strong correlation was also observed between Barbee Grab and Barbee Composite samples (R2 = 0.80, p = 0.00).
  • Higher RNA copies of SARS-CoV-2 (N1 gene) were detected during the Spring semester compared to the Fall and Summer semesters.

Sources:

  • NewsRx. Researchers from North Carolina Agricultural and Technical State University Describe Research in COVID-19 (Wastewater Speaks: Evaluating SARS-CoV-2 Surveillance, Sampling Methods, and Seasonal Infection Trends on a University Campus). Genomics & Genetics Weekly. May 16, 2025; p 332.
  • Wastewater Speaks: Evaluating SARS-CoV-2 Surveillance, Sampling Methods, and Seasonal Infection Trends on a University Campus. Microorganisms, 2025,13(4):924. (Microorganisms - http://www.mdpi.com/journal/microorganisms)

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