Secondary infections

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Secondary infections

Definition

A secondary infection is an infection that occurs during or after treatment for another infection. It may be caused by the first treatment or by changes in the body or immune system that allow a second infection.

Two examples of a secondary infection are:

A vaginal yeast infection after taking antibiotics to treat an infection caused by bacteria
Pneumonia caused by bacteria or fungi after having an upper respiratory infection (like a cold) that was caused by a virus

References

Clifton IJ, Ellames DAB. Respiratory medicine. In: Penman ID, Ralston SH, Strachan MWJ, Hobson RP, eds. Davidson's Principles and Practice of Medicine. 24th ed. Philadelphia, PA: Elsevier; 2023:chap 17.

Dockrell DH, Sundar S, Angus BJ. Infectious disease. In: Penman ID, Ralston SH, Strachan MWJ, Hobson RP, eds. Davidson's Principles and Practice of Medicine. 24th ed. Philadelphia, PA: Elsevier; 2023:chap 13.

Review Date: 8/26/2023
Reviewed By: Jatin M. Vyas, MD, PhD, Roy and Diana Vagelos Professor in Medicine, Columbia University Vagelos College of Physicians and Surgeons, Division of Infectious Diseases, Department of Medicine, New York, NY. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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