Gram staining Flashcards
gram positive bacilli
Bacillus anthracis
Bacillus cereus
Catalase test
3% hydrogen perioxide-bubbles
Staph or Step?
Catalase positive
Staphylococcus spp.
Catalase negative
Streptococcus species
Coagulase test
clot formation
Staph A. or nonpathogenic Staph?
Coagulase positive
Staphylococcus aureus
Coagulase negative
Staphylococcus spp.
Oxidase Test
color change: purple
E. Coli or Pseudomonas?
Oxidase positive
Pseudomonas aeuriginosa
Escherichia coli
Streptococcus spp.
gram positive cocci-catalase negative
Staphylococcus epidermis
gram positive cocci-catalase positive-coagulase negative
Staphylococcus aureus
golden staph
gram positive cocci-catalase positive-coagulase positive
Pseudomonus aeurginosa
gram negative bacilli-oxidase positive
Escherichia coli
gram negative bacilli-oxidase negative