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COVID-19

COVID-19 Pandemic-era Longitudinal Surveillance Data Enhances Infectious Disease Investigations

Strategic Insights

— 1 min read

Boston, Massachusetts, based on a report, researchers stated that epidemiologic investigations of multidrug-resistant organism (MDRO) clusters depended on a thorough history of health care exposures for case patients; however, histories are often incomplete. A new study utilized the robust influx of longitudinal infectious disease surveillance data from the COVID-19 pandemic to improve whole-genome sequence-related cluster investigations and validate single nucleotide polymorphism (SNP) cluster definition thresholds for carbapenem-resistant Acinetobacter baumannii (CRAB) in Massachusetts.

Key Takeaways:

  • The study used longitudinal infectious disease surveillance data from the COVID-19 pandemic to improve whole-genome sequence-related cluster investigations and validate SNP cluster definition thresholds for CRAB in Massachusetts.
  • The data extracted included 2354 test results for 69 CRAB case patients across 9 clusters, with 2007 test results from COVID-19 events.
  • Three-quarters (n = 1775) of test results indicated a health care exposure not identified through standard investigation.
  • Fifty-five case patients had a spatial link with at least 1 other case patient in their cluster, with a median number of SNP differences between all spatially linked cases and all non-spatially linked cases of 4 SNPs and 10 SNPs, respectively.
  • The study concluded that health departments can apply this method to enhance infectious disease investigations and determine appropriate SNP thresholds for infectious disease clusters.
  • Funders for this research include the Centers for Disease Control and Prevention Epidemiology, Laboratory Capacity for Prevention and Control of Emerging Infectious Diseases Cooperative Agreement.
  • The study was led by Danielle Chaney from the Massachusetts Department of Public Health, Bur Infect Dis & Lab Sci, Division of Epidemiology.

Statistics:

  • 2354 test results for 69 CRAB case patients across 9 clusters
  • 2007 test results were from COVID-19 events
  • 75% (n = 1775) of test results indicated a health care exposure not identified through standard investigation
  • 55 case patients had a spatial link with at least 1 other case patient in their cluster
  • Median number of SNP differences between all spatially linked cases and all non-spatially linked cases: 4 SNPs and 10 SNPs, respectively

Sources:

  • NewsRx. Recent Findings from Massachusetts Department of Public Health Has Provided New Information about COVID-19 (Using Pandemic-era Longitudinal Surveillance Data To Improve Investigations of Carbapenem-resistant acinetobacter Baumannii ...). Medical Letter on the CDC & FDA. October 19, 2025; p 329.

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