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Updated: Jun 11, 2026

Quantitative High-throughput Single-cell Cytotoxicity Assay For T Cells

Quantitative High-throughput Single-cell Cytotoxicity Assay For T Cells

Published on: February 2, 2013

A high-throughput anaerobic method for viability assays.

Mohamed El-Fateh^1,2,3, Christian T Meyer^3,4,5, Anushree Chatterjee^3,4,6

¹Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, Quebec, Canada.

Microbiology Spectrum

|March 5, 2025

Summary

A new Geometric Viability Assay (GVA) offers rapid, cost-effective viability testing for anaerobes like Clostridium perfringens. This method is reliable for antibiotic sensitivity testing and spore quantification, improving anaerobic research and public health applications.

Keywords:

anaerobes antibiotic resistance bacterial viability bactericidal activity spores susceptibility testing

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Area of Science:

Microbiology
Anaerobic bacterial viability assessment
Bacteriology

Background:

Traditional anaerobic viability testing is time-consuming, expensive, and low-throughput.
Limited knowledge exists on anaerobe susceptibility patterns and sporulation due to method limitations.
Need for rapid, economical, and reliable methods for anaerobic viability testing.

Purpose of the Study:

To develop and validate a rapid, economical, and reliable Geometric Viability Assay (GVA) for anaerobic bacteria.
To assess the GVA's utility in antibiotic sensitivity testing (AST) and spore quantification.
To demonstrate the GVA's applicability to various anaerobic species, including Clostridium perfringens.

Main Methods:

Utilized the Geometric Viability Assay (GVA) with an anaerobic jar system for viability testing.
Modeled the assay using Clostridium perfringens, with subsequent testing on Clostridium bifermentans and Clostridium sporogenes.
Performed antibiotic sensitivity testing (AST) and determined minimum bactericidal concentrations (MBC).

Main Results:

Anaerobic GVA provided rapid, cost-effective, and reliable viability measurements comparable to traditional plate assays (CFU).
The assay demonstrated a wide dynamic range (5 orders of magnitude) and low technical bias.
GVA accurately determined antibiotic bactericidal activity in a dose-dependent manner and quantified spore concentrations.

Conclusions:

Anaerobic GVA is a valuable tool for high-throughput, accurate viability screening of anaerobic bacteria.
The method is compatible with routine assays like AST and spore screening, enhancing scalability.
GVA offers a significant advancement for research in drug-microbe, host-microbe, and microbe-microbe interactions.