Page 18 - PowerPoint Presentation

• Summary of Results
- Gram-positive bacteria: Stain purple due to the retention of the crystal violet.
- Gram-negative bacteria: Stain pink due to the uptake of safranin after losing the
initial crystal violet stain.

• Importance: The Gram stain is crucial for:
• Bacterial Classification: Helps in identification and differentiation of bacterial species.
• Guiding Treatment: Determines the type of antibiotics that may be effective, as Gram-

positive and Gram-negative bacteria respond differently to treatments.