Staphylococcus
- Cocci. -Gram +ve
- Catalse +Ve
- arranged in cluster of grapes
- most staphylococcus Non motile. Non sopre.
- most staphylococcus facultative anerobic.
- able to grow in media containing high concentration of salt.
- at temp from 18C-40C staph bacteria are present on the skin and mucous membrane of human.
- Opportunistic infections.
- the outer layer of most staphylococcus cell wall covered with (polysaccharide capsule).
- Eleven capsular serotypes have been identified in S.aureus with serotypes 5 and 7 associated with majority of infection.
- peptidoglycan can form Half the cell wall of staph.
- protin A can be used as specific identification test for S.aureus( not other Non coagulase staph)
- There are simple biochemical tests e.g (coagulase, protein A , heat- stable nuclease , manitol fermentation) can be used to identify colonies ofS. Aureus and other staph
Author:
admin on
2012/01/18
Category:
microbiology
Tags: cocci, gram, positive, Staphylococcus
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