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THE SELECTIVE BACTERICIDAL ACTION OF GENTIAN VIOLET.

The Journal of experimental medicine·2009

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Related Experiment Video

Updated: Jun 19, 2026

Monitoring Changes in Membrane Polarity, Membrane Integrity, and Intracellular Ion Concentrations in Streptococcus pneumoniae Using Fluorescent Dyes

Monitoring Changes in Membrane Polarity, Membrane Integrity, and Intracellular Ion Concentrations in Streptococcus pneumoniae Using Fluorescent Dyes

Published on: February 17, 2014

BACTERIOSTASIS BY MIXTURE OF DYES.

J W Churchman¹

¹Department of Hygiene of Cornell University Medical College, New York.

The Journal of Experimental Medicine

|October 30, 2009

Summary

Mixing two dyes with opposing antibacterial powers creates a potent combination. Gentian violet and acriflavine together effectively kill both Gram-positive and Gram-negative bacteria.

Area of Science:

Microbiology
Bacteriology
Antimicrobial Agents

Background:

Selective bacteriostatic agents target specific bacterial groups.
Gentian violet targets Gram-positive bacteria.
Acriflavine targets Gram-negative bacteria.

Purpose of the Study:

To investigate the synergistic antimicrobial effects of combining bacteriostatic dyes.
To determine if a mixture of dyes with opposing selective powers can achieve broad-spectrum bactericidal activity.

Main Methods:

Experimental combination of gentian violet and acriflavine.
Testing the efficacy of the dye mixture against both Gram-positive and Gram-negative bacteria.

Main Results:

A mixture of gentian violet and acriflavine demonstrated combined bacteriostatic and bactericidal properties.

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The combination proved effective against both Gram-positive and Gram-negative bacterial groups.

The synergistic effect overcame the individual limitations of each dye.

Conclusions:

Combining bacteriostatic dyes with opposing selectivities can yield a broad-spectrum bactericidal agent.
This synergistic approach enhances antimicrobial efficacy by compensating for individual dye weaknesses.
Dye mixtures represent a promising strategy for developing novel antibacterial treatments.