Effect of Bactericidal Substance from Staphylococcus aureus on Group A Streptococci II. Structural Alterations

Author:

Clawson C. Carlyle1,Dajani Adnan S.1

Affiliation:

1. Department of Pediatrics, University of Minnesota College of Medical Sciences, Minneapolis, Minnesota 55455

Abstract

Ultrastructural alterations brought about by treatment of a β-hemolytic streptococcus with a bactericidal substance from Staphylococcus aureus are described and illustrated. The substance causes an early condensation of nucleoid deoxyribonucleic acid (DNA) and a partial loss of ribosomes. These changes are followed by a dissolution of the cell contents resulting in bacterial “ghosts” composed of empty cell wall and capsule. These morphological findings correlate with known biochemical effects of the bactericidal substance on ribonucleic acid degradation and cessation of DNA and protein synthesis.

Publisher

American Society for Microbiology

Subject

Infectious Diseases,Immunology,Microbiology,Parasitology

Reference10 articles.

1. Intraphagocytic degradation of group A streptococci: electron microscopic studies;Ayoub E. M.;J. Bacteriol.,1969

2. Cole R. M. 1968. The structure of group A streptococcal cell and its L-form. In Rene Caravano (ed.) Current research on group A streptococcus. Excerpta Medical Foundation Moniograph.

3. Bactericidal substance from Staphylococcus aureus. Biological properties;Dajani A. S.;J. Exp. Med.,1970

4. Effect of bactericidal substance from Staphylococcus aureus on group A streptococci. I. Biochemical alterations;Dajani A. S.;Infec. Immun.,1970

5. Demonstration of a bactericidal substance against 3-hemolytic streptococci in supernatant fluids of staphylococcal cultures;Dajani A. S.;J. Bacteriol.,1969

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