Dichotomous Key for Identifying Unknown Bacteria by w8SJ3Gxz

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									                                                                                   Dichotomous Key
                                                          Simple Stain



                        Cocci
                                                                                                     Bacilli
                                                                                                  Gram Stain
                  Gram Stain
                                                                   Gram                        Gram positive bacilli
            Gram                     Gram                          negative
            negative cocci           positive                      bacilli                     Acid Fast stain
                                     cocci
                                                            MacConkey’s
                                                                                         Acid Fast               Not
                          Mannitol Salt
                                                                                                                 acid
                                                            No                                                   fast
                                                                               Pink     Mycobacterium
                                                            color
                                                            change             colonies tuberculosis
                                                                                                Endospore stain
               yellow                     pink
                                                  Salmonella
                                                  pullorum               E. coli                  Forms
                                                                          Intense pink
               Staphylococcus           Staphylococcus                                            endospores
                                                                         Enterobacter
               aureus                   epidermis                        aerogenes
                                                                                                  Bacillus subtilus
                                                                          Light, uneven pink
From the Virtual Microbiology Classroom on ScienceProfOnline.com

								
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