CNA Practice Test
Infection controlQuestion 243 of 1700

A wound has yellow or green drainage. What is this called?

  1. Serous drainage, which is clear and thin
  2. Normal healing, which has no drainage
  3. Purulent drainage
  4. Edema, which is swelling in the tissues
Show answer

Correct answer: Purulent drainage

White blood cells moving to the site cause purulent drainage.

Source: Nursing Assistant (Reuter), 4.7: Signs and Symptoms of Infection

Practice infection control

Questions last reviewed: 18 October 2026