Skin testing, PPD (R arm) and Candida (L)

Skin testing, PPD (R arm) and Candida (L)
The right arm represents a positive reaction to PPD (a skin test for tuberculosis protein). The left arm represents a positive reaction to Candida protein. Candida antigen is tested to determine if the individual's immune system is functioning well; a normal immune system demonstrates a positive reaction.

Update Date: 6/25/2011

Updated by: David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc., and Stuart I. Henochowicz, MD, FACP, Associate Clinical Professor of Medicine, Division of Allergy, Immunology, and Rheumatology, Georgetown University Medical School.

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