Transcript Dichotomous Key for Identifying Unknown Bacteria

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