Last Updated on June 28, 2020 by Sagar Aryal
Habitat and Morphology of Staphylococcus aureus
- Natural habitat is mammalian body surfaces.
- They are normal flora of skin and mucous membrane.
- Also present in nose / the anterior nares.
- They can also be found in Pharynx.
- Found in stratified epithelial cells or mucous or serum constituents associated with these cells.
- Found in skin/nasal passage and axillae of humans.
- They act as benign or symbiotic relationship with the hosts.
- Enterogeneric strains of S. aureus are found in various food products.
- They may survive in dry skin.
- Thirty percent (30%) of the normal human healthy population is affected by S. aureus as it asymptomatically colonizes on the skin of human host.
- Gram positive, singly, in pairs or in short chain of 3-4 bacteria.
- Irregular clusters of cells.
- 1 um in diameter
- Spherical colonies in clusters in two planes.
- Cell wall- very thick peptidoglycan layer
- Non-Flagellated, Non-Motile and Non-Sporing
- They are capsulated.
- Grapes like clusters arrangement.