GRAM STAIN

What this test checks

Stains and examines a sample to identify whether bacteria are Gram-positive or Gram-negative — helps choose antibiotics fast.

Why do people get this test?

Used as a fast first test alongside cultures.

When you should consider this test

• Pus, fluid, or body sample analysis
• Initial infection evaluation
• Doctor requested

How to prepare

Performed on sample your doctor provided.