Positive KOH
Escherichia Coli
Negative KOH
Staphylococcus aureus
Positive Catalase
Staphylococcus aureus
Negative catalase
Streptococcus (any)
e.g. streptococcus pneumoniae
Positive oxidase
Pseudomonas aeruginosa
Negative oxidase
Escherichia coli
What controls does Staphylococcus aureus cover
Negative KOH
Positive catalase
What controls does Escherichia coli cover
Positive KOH
Oxidase negative