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THE ACCELERATING EFFECT OF MANGANOUS IONS ON PHAGE ACTION

A P Krueger1, N S West

  • 1Department of Bacteriology, University of California, Berkeley.

The Journal of General Physiology
|October 30, 2009
PubMed

Insights

Manganese ions (Mn++) significantly accelerate phage lysis of staphylococci by lowering the required phage-to-bacterium ratio. This speeds up bacterial destruction, making phage therapy more efficient.

Area of Science:

  • Microbiology
  • Bacteriology
  • Virology

Background:

  • Bacteriophage therapy is a promising alternative to antibiotics for treating bacterial infections.
  • Staphylococci are common human pathogens, and phage lysis is a key mechanism for their elimination.

Purpose of the Study:

  • To investigate the effect of manganese ions (Mn++) on the lytic activity of bacteriophages against staphylococci.
  • To elucidate the mechanism by which manganese influences phage-bacterial interactions.

Main Methods:

  • Experiments were conducted using dilute solutions of manganese chloride (MnCl2) or manganese sulfate (MnSO4) with susceptible staphylococci and bacteriophages.
  • Lysis time, phage-to-bacterium ratio (lytic threshold), phage distribution, and bacterial growth rates were measured.
  • Extracellular phage concentration and final phage titers were quantified.

Main Results:

  • Manganese-containing mixtures reduced lysis time by approximately 0.5 hours compared to controls.
  • Mn++ significantly lowered the lytic threshold from 54 to about 12 phage per bacterium.
  • Extracellular phage concentration increased approximately fourfold in the presence of manganese, without affecting bacterial growth or phage formation.

Conclusions:

  • Manganese ions enhance bacteriophage lysis of staphylococci by reducing the phage required for bacterial destruction.
  • The findings suggest that manganese can improve the efficiency of phage therapy by lowering the effective dose of phage needed.
  • Further research into manganese-mediated phage-bacterial interactions could optimize phage therapy strategies.

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