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Chiggers - Overview

Alternative Names

Harvest mite; Red mite

Definition of Chiggers:

Chiggers are tiny, six-legged wingless organisms (larvae) that grow up to become a type of mite. Chiggers are found in tall grass and weeds. Their bite causes severe itching.

Causes, incidence, and risk factors:

Chiggers are found in certain areas, such as berry patches, tall grass and weeds, and woodland edges.

The chiggers bite humans around the waist, ankles, or in warm skin folds. Bites commonly occur in the summer and fall months.

Chigger bite - close-up of blisters

Reviewed last on: 10/28/2008
Linda Vorvick, MD, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine; and Jatin M. Vyas, PHD, MD, Instructor in Medicine, Harvard Medical School, Assistant in Medicine, Division of Infectious Disease, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

References

Wilson BB, Mathieu ME. Mites (including chiggers). In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 6th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2005:chap 294.

Schlossberg D. Arthropods and leeches. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 380.

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