Affiliation:
1. Department of Oral Medicine and Oral Pathology, Welsh National School of Medicine, Cardiff CF 4 4XY, Wales
Abstract
Colonies of
S. mutans
OMZ61,
Streptococcus
sp. D182,
Staphylococcus aureus
Oxford NCTC 6571, and
Candida albicans
type A, MRL 3153 were grown on various media. Cubes of agar bearing two to three colonies were excised and processed for scanning electron microscopy. The characteristic shape of the colonies was seen when examined at low magnifications. At a magnification of 2,000 diameters, the arrangement of individual organisms within the colonies was observed. Plano-convex colonies consisted of uniformly distributed organisms, whereas
S. mutans
colonies presented a more complex arrangement possibly associated with the production of extracellular polysaccharides. Certain colonies were totally or partially covered by an adherent film through which the outline of the organisms could be distinguished.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
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