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Related Concept Videos

Genetic Screens02:46

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Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
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A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
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Alleles are different forms of the same gene. Humans and other diploid organisms inherit two alleles of every gene, one from each parent.
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Updated: Dec 3, 2025

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Update on Susceptibility Testing: Genotypic and Phenotypic Methods.

Romney M Humphries1

  • 1Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, 1161 21st Avenue South C-3322 MCN, Nashville, TN 37232-2561, USA.

Clinics in Laboratory Medicine
|October 30, 2020
PubMed
Summary
This summary is machine-generated.

Antimicrobial susceptibility testing (AST) is crucial for patient care and tracking antimicrobial resistance. This review covers current AST methods and emerging technologies to overcome limitations like speed and culture requirements.

Keywords:
Antimicrobial resistanceAntimicrobial susceptibility testingBacteriology

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Area of Science:

  • Clinical microbiology
  • Infectious diseases
  • Diagnostic technology

Background:

  • Antimicrobial susceptibility testing (AST) is a cornerstone of clinical microbiology.
  • Current AST methods face limitations including long turnaround times, need for pure cultures, and high bacterial concentrations.
  • These limitations impact timely patient care and antimicrobial resistance epidemiology.

Purpose of the Study:

  • To review the global landscape of antimicrobial susceptibility testing.
  • To discuss novel phenotypic and genotypic methods for AST.
  • To highlight advancements addressing current limitations in AST.

Main Methods:

  • Review of current literature on antimicrobial susceptibility testing.
  • Analysis of emerging phenotypic and genotypic AST methods.
  • Assessment of methods in late-stage development or recently introduced to the market.

Main Results:

  • AST remains critical but faces significant challenges in clinical practice.
  • New phenotypic methods offer potential for faster results and reduced sample requirements.
  • Genotypic methods provide rapid detection of resistance mechanisms, complementing phenotypic approaches.

Conclusions:

  • Advancements in AST are essential to improve patient outcomes and combat antimicrobial resistance.
  • Emerging technologies promise to overcome existing limitations of traditional AST.
  • A combination of phenotypic and genotypic methods may offer the most comprehensive AST approach.