Which discharge characteristics help differentiate infections from normal vaginal discharge?

• A. Color, odor, viscosity, amount; itching or irritation; pH or microscopy findings; BV (thin gray/white, fishy odor); trichomonas (yellow-green, frothy); candidiasis (thick cottage-cheese).
• B. Temperature changes.
• C. Presence of hair.
• D. Blood in discharge.

Answer: (A)

Discharge characteristics are the main clues for telling normal vaginal secretions from infections. Normal discharge varies with the menstrual cycle and is usually clear to white, odorless, and either watery or slightly thick; it should not cause itching or significant irritation, and its pH is in the typical acidic range (roughly 3.8–4.5). When infection is present, you commonly see changes in color, odor, and viscosity, along with symptoms and objective findings that point to a specific organism.

For bacterial vaginosis, expect a thin gray-to-white discharge with a fishy odor. The pH is usually greater than 4.5, and microscopy often shows clue cells.

For trichomoniasis, the discharge is often yellow-green and frothy, sometimes with itching or irritation; the pH tends to be above 4.5, and microscopy may reveal motile trichomonads.

For candidiasis, the discharge is typically thick and white, like cottage cheese, often with itching and irritation; the pH is usually normal (below 4.5), and microscopy can show pseudohyphae with budding yeast.

In short, color, odor, viscosity, and amount, plus itching and pH or microscopy findings, together map the discharge pattern to a normal state or to BV, trichomonas, or candidiasis.