scientist analysis escherichia coli e.coli culture with eosin methylene blue emb agar in petri dish show the metallic green.

agar alcohol analysis aseptic autoclave backdrop background bacteria biology black blue bright closeup coli colonies culture disease dish ecoli emb eosin escherichia experiment food glass gloves green growth hands health hold inflection inoculation isolated lab laboratory light loop media medical medicine metallic methylene microbiology microscope nitrile organic petri petrie plate red research science scientist selective sheen show technique test white