1884

Gram staining

• Gram staining makes bacteria visible
• and can help to quickly identify
• the bacterial species.
• Gram-positive bacteria
• have thick outer cell walls of peptidoglycan
• that can be stained with a crystal violet dye.
• Gram-negative bacteria
• resist the violet dye but can be counterstained
• red or pink with safranin or fuchsine.

Gram-related

• Bacteria are categorized by gram staining,
• shape, envelope organization,
• and RNA phylogenetic studies.
• Gram staining positive or negative
• does not necessarily mean
• the bacterial species are genetically related.
• Insert gobbledeegook here.

Tests

• The test of effort—
• a stained sleeve.
• The test of fidelity—
• lipstick on the collar.
• The test of housekeeping—
• ring in the tub.
• The test of experience—
• worry lines.
• Picking berries—
• stained hands.
• Gardening—
• dirt under the nails.
• Cleaning fish—
• scales stuck to sleeves.
• History of science—
• others who understand.