Related Experiment Videos
Routine testing for Primula obconica: is it useful in the United States?
1Department of Dermatology, University of Pennsylvania, Philadelphia, PA, USA.
Summary
Allergic contact dermatitis from Primula obconica (primin) is common in Europe but rare in the US. A study found primin allergy too infrequent in US patients for routine patch testing.
Area of Science:
- Dermatology
- Allergology
- Contact Dermatitis
Background:
- Primula obconica (primin) is a known cause of allergic contact dermatitis.
- It is a common allergen in Europe and included in standard patch testing protocols.
- The prevalence of primin allergy in the United States is not well-established.
Observation:
- This study evaluated the frequency of primin allergy in a US referral patch test center.
- 567 consecutive patients underwent patch testing, with primin included in the standard screening series.
- Only one patient (0.18%) exhibited a positive reaction to primin.
Findings:
- The observed frequency of primin allergy in this US cohort was very low.
- The low prevalence suggests primin is a rare allergen in the American population.
- This contrasts with its higher incidence reported in European studies.
Implications:
- Routine patch testing for primin allergy may not be warranted in the United States.
- Further research could explore geographic variations in allergen prevalence.
- Clinicians should consider primin allergy in differential diagnoses, despite its low frequency.