THE GENUS STAPHYLOCOCCUS - LF

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THE GENUS STAPHYLOCOCCUS - LF

Capsule or polysaccharide slime layer

A loose-fitting, polysaccharide layer (slime layer) is only

occasionally found in staphylococci cultured in vitro, but is

believed to be more commonly present in vivo.

Eleven capsular serotypes have been identified in S. aureus,

with serotypes 5 and 7 associated with majority of

infections.

The capsule protects the bacteria by inhibiting the

chemotaxis and phagycotosis of staphylococci by

polymorphonuclear leukocytes, as well as by inhibiting the

proliferation of mononuclear cells.

It is also facilitates the adherence of bacteria to catheters

and other synthetic material.

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