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Pneumonia V: Nursing management and Prevention01:30

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Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
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Updated: Jul 23, 2025

Live Imaging and Quantification of Viral Infection in K18 hACE2 Transgenic Mice Using Reporter-Expressing Recombinant SARS-CoV-2
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SARS-CoV-2 entry into and evolution within a skilled nursing facility.

Nicole R Sexton1,2, Parker J Cline1, Emily N Gallichotte1

  • 1Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA.

Scientific Reports
|July 19, 2023
PubMed
Summary
This summary is machine-generated.

This study tracked SARS-CoV-2 evolution during a skilled nursing facility outbreak. A single introduction led to widespread infection, highlighting the importance of understanding viral evolution in specific settings.

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Area of Science:

  • Virology
  • Epidemiology
  • Genomics

Background:

  • Coronaviridae, including SARS-CoV-2, significantly impact aging populations.
  • SARS-CoV-2 is adapting to human hosts, with ongoing research into its evolution.
  • Previous studies often examined SARS-CoV-2 evolution across broad populations.

Purpose of the Study:

  • To investigate SARS-CoV-2 evolution within a single, epidemiologically linked outbreak at a skilled nursing facility.
  • To analyze viral evolution from the initial introduction of the pathogen.
  • To understand consensus and intra-host variation during transmission.

Main Methods:

  • Genomic sequencing of SARS-CoV-2 samples from individuals within a skilled nursing facility outbreak.
  • Analysis of viral sequences at both consensus and intra-host variation levels.
  • Tracking of pathogen introduction and transmission dynamics within the facility.

Main Results:

  • Multiple introductions of SARS-CoV-2 occurred without sustained interfacility spread.
  • A single introduction event resulted in a large-scale, rapid infection within the facility.
  • This dominant genotype persisted throughout the outbreak period.
  • Analysis revealed both consensus and intra-host genetic variability.

Conclusions:

  • Understanding SARS-CoV-2 variability during transmission is crucial for disease spread insights.
  • Findings can inform improved mitigation strategies for infectious diseases in congregate settings.
  • Focusing on specific outbreak dynamics provides valuable evolutionary data.