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Related Concept Videos

Sputum Studies II: Culture and Sensitivity01:20

Sputum Studies II: Culture and Sensitivity

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Description
Sputum culture and sensitivity is a medical procedure used to diagnose bacterial infections in the respiratory tract and select the most appropriate antibiotics for treatment. This process involves analyzing sputum samples of thick and opaque secretions produced in the lungs and airways. These samples are collected from patients and then sent to the laboratory for analysis.
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The respiratory system's basic structures and primary functions lay the foundation for nurses' comprehensive respiratory assessments. This assessment includes subjective and objective data to gauge the patient's respiratory health.
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Respiratory assessment is a cornerstone of nursing assessments, crucial for the early detection of patient deterioration. This evaluation transcends routine procedures, representing a critical skill nurses must master to ensure optimal patient care.
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Related Experiment Video

Updated: Aug 1, 2025

Efficient SARS-CoV-2 Quantitative Reverse Transcriptase PCR Saliva Diagnostic Strategy utilizing Open-Source Pipetting Robots
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Breath testing for SARS-CoV-2 infection.

Renelle Myers1, Dorota M Ruszkiewicz1, Austin Meister2

  • 1Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada; British Columbia Cancer Research Institute; Vancouver, British Columbia, Canada.

Ebiomedicine
|April 30, 2023
PubMed
Summary
This summary is machine-generated.

Identifying specific volatile organic compounds (VOCs) in exhaled breath can detect mild SARS-CoV-2 infection. This supports the development of a non-invasive, point-of-care breath test for early COVID-19 detection.

Keywords:
BiomarkersBreath-testingGC-MSSARS-CoV-2VOCs

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Area of Science:

  • Biochemistry
  • Medical Diagnostics
  • Public Health

Background:

  • Identifying individuals with mild SARS-CoV-2 (the virus that causes COVID-19) is crucial for disease containment.
  • Volatile organic compounds (VOCs) in exhaled breath may serve as biomarkers for infection.

Purpose of the Study:

  • To identify VOCs in exhaled breath common to SARS-CoV-2 infection across different variants.
  • To assess the potential for a point-of-care breath test for detecting mild COVID-19.

Main Methods:

  • A prospective observational study compared VOCs in exhaled breath of symptomatic outpatients tested for SARS-CoV-2.
  • Gas chromatography-time of flight mass spectrometry (GC-ToF-MS) analyzed breath samples.
  • Candidate VOCs were validated in samples from the Omicron variant phase.

Main Results:

  • A model identified 12 VOCs differentiating active SARS-CoV-2 infection from convalescence with 82% sensitivity and 86% specificity.
  • Another model with 11 VOCs distinguished symptomatic SARS-CoV-2 positive from negative individuals (72% sensitivity, 65.5% specificity).
  • These 11 VOCs showed high performance in detecting Omicron variant infections (80% sensitivity, 90% specificity) against healthy controls.

Conclusions:

  • Exhaled breath analysis is a promising non-invasive method for detecting mild COVID-19.
  • The identified VOCs can inform the development of rapid, point-of-care diagnostic tests.
  • This approach could significantly aid in managing infectious respiratory diseases.