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Induction of aggregation in Streptococcus mitis by certain ions.
Acta Pathologica, Microbiologica, Et Immunologica Scandinavica. Section B, Microbiology
|October 1, 1984
Summary
Certain metal ions like zinc and lanthanum rapidly induce Streptococcus mitis aggregation, differing from spontaneous clumping. This study differentiates induced and spontaneous bacterial aggregation mechanisms.
Area of Science:
- Microbiology
- Biochemistry
Background:
- Spontaneous aggregation is a known phenomenon in Streptococcus mitis ATCC 903.
- Understanding the factors influencing bacterial aggregation is crucial for various applications.
Purpose of the Study:
- To investigate the effects of specific metal ions on Streptococcus mitis ATCC 903 aggregation.
- To differentiate the mechanisms of ion-induced and spontaneous bacterial aggregation.
Main Methods:
- Suspension of Streptococcus mitis ATCC 903 in salt solutions with various ions (zinc, aluminium, lanthanum, cerium).
- Assessing aggregation rates, stability, and reversibility under different conditions (pH, salt concentrations, enzyme treatments).
- Investigating the effect of galactosamine on aggregation.
Main Results:
- Zinc, aluminium, lanthanum, and cerium ions rapidly induced Streptococcus mitis aggregation.
- Ion-induced aggregation differed in rate, stability, and response to dissociation agents compared to spontaneous aggregation.
- Enzyme treatments affecting aggregation could be reversed by specific ions, and galactosamine showed differential inhibition.
Conclusions:
- Induced and spontaneous bacterial aggregations are qualitatively distinct processes.
- Metal ions play a significant role in modulating Streptococcus mitis aggregation.
- A molecular model differentiating these aggregation types is proposed.