The Streptococci and Enterococci

The Streptococci

? Diverse collection of cocci.

? Gram-positive ? Chains or pairs ? significant pathogens

? Strong fermenters ? Facultative anaerobes ? Non-motile ? Catalase Negative

Genus: Streptococcus and

1

Enterococcus

Classification 1

Genus: Streptococcus and

2

Enterococcus

Classification 2

? The pyogenic group ? The mitis group ? The anginosus group ? The salivarius group ? The bovis group ? The mutans group

Genus: Streptococcus and

3

Enterococcus

Haemolytic activity

? -haemolysis ccipage/Hemolysis.jpg

? -haemolysis Website/lab/idlab/hemo.jpg

? Another useful site:

Genus: Streptococcus and

4

Enterococcus

Lancefield Grouping

? Serological classification

? Means of distinguishing PYOGENIC Streps

? Differences in cell wall polysaccharides

Genus: Streptococcus and

5

Enterococcus

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