THE LOCALIZATION OF STREPTOCOCCUS VIRIDANS.

Area of Science:

• Microbiology
• Pathology
• Infectious Diseases

Background:

• Streptococcus viridans is implicated in various infections.
• The theory of selective pathogenicity suggests specific bacterial strains target particular tissues.

Purpose of the Study:

• To investigate the selective action theory of Streptococcus viridans.
• To determine if Streptococcus viridans strains exhibit predictable tissue tropism.

Main Methods:

• Inoculation of animal models with various Streptococcus viridans strains.
• Observation and documentation of lesion development and location.
• Correlation analysis between bacterial origin and induced pathology.

Main Results:

• The majority of Streptococcus viridans strains did not demonstrate selective pathogenicity.
• A minority of strains showed some consistency in lesion type and location.
• Lesion location, particularly in the heart and joints, was largely independent of the strain's origin.

Conclusions:

• Experimental evidence does not fully support the theory of selective action for Streptococcus viridans.
• Streptococcus viridans exhibits a propensity for causing lesions in the heart and joints across different origins.