Gram positive cocci

Gram positive cocci

Staphylococcus:

Organisms belonging to the genus: Staphylococcus are gram positive spherical cells.

Usually arranged in grape like clusters .they are capable of growing on ordinary media and produce white or golden yellow colonies, All produce cataloes and some species are highly pathogenic while others are not.

Classification:

A.On the basis of coagulates production:

Staphylococci Two types:  

  1.Coagulates positive                               2.Coagulates negative

    -S. aurous.                                               –S.epidermidis

                                                                 -S .saprophytic us.

B. On the basis of pigment production:

Sraphylococci Two types:

  1.Pigment producing                                2.Non –pigment producting

                                                             -S. suprophytieus.

Pigment producing three types:

  1.Golden yellow colonies.                            a.-S.aureus

  2.White colonies                                          a.-S.albus

  3.Lemon yellow colonice                             a.-S.citreus