Immunological skin testing and interpretation. A plea for uniformity

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Abstract
Immunological skin tests are one of the major methods used for the assessment of one's immune status. A review of the literature clearly reveals that there is no uniform method for the administration and interpretation of skin tests. Without uniformity, it is obvious that data are not comparable. Contradictory conclusions may be reached from the same skin test data, depending upon the method of interpretation used. Precedent, rather than rationale, has often determined the method of interpretation. There are studies which suggest that slight induration or erythema, often considered negative, are significant immunologic events. The various methods of skin test administration and interpretation are reviewed. Recommendations for application and interpretation are presented so that uniformity may exist.