Ben J's Gram Slam

Current step

Drag down onto the bench to set it out · drop reagents onto things · drag back up to put away

Gram stainsmear → warmer → heat-fix → CV → iodine → ethanol → safranin → oil

Purple cocciGram-positive

Catalase3% H₂O₂

Bubbles

MSA½ neg. control

YellowS. aureus

Pink / redS. epidermidis

No bubbles

Blood agar½ neg. control

β clear zoneS. pyogenes

γ no clearingE. faecalis

Red / pink rodsGram-negative

Methyl Redcontrol + sample tube

Red

EMB½ neg. control

Green sheenE. coli

Light pinkS. typhimurium

No red

DNase½ neg. control

ClearingP. aeruginosa

Blue-greenE. aerogenes

0%done