Gram stain test. A glass Petri dish with pathogen bacterial culture before and after use Crystal violet. Bacteria stained with gentian violet. Gram-po
Gram stain test. A glass Petri dish with pathogen bacterial culture before and after use Crystal violet. Bacteria stained with gentian violet. Gram-positive bacteria are violet-stained like cocci. Gram-negative bacteria are pink-stained like bacilli. Vector illustration
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Photo credit: © Tetiana Zhabska / Alamy / Afripics
License: Royalty Free
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