The scenario
A laboratory technician follows a standardized Gram staining procedure to classify an unknown bacterial isolate based on cell wall properties and microscopic morphology.
What is in this drawing
Read the decisions behind it.
01
Purple vs pink/red color after staining
02
Cocci clusters vs chains vs bacilli for Gram-positive organisms
03
Cocci vs bacilli vs coccobacilli for Gram-negative organisms
Use when teaching or executing the Gram stain protocol to presumptively identify bacterial groups from a pure culture.
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