Streptococchi

                             Sviluppo in NaCl 6,5%

                  -                                                                                  +

Str. uberi                                                          Sviluppo in blu di metilene 0,1

                                                                       +                                       -

                                                               Arabinosio                         Str. Avium

                                            +                                               -

                                    Str. Fecium                                      Beta emolisi

                                                                       +                                            -

                                                                   Str. Fecalis                     Str. Fecalis

                                                                                            +                        -

                                                                                      Liquefas                 Fecalis