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Updated: May 19, 2026

A Mouse Ear Model for Allergic Contact Dermatitis Evaluation
Published on: March 24, 2023
Allergic dermatitis due to topical antibiotics
Jonathan H Shahbazian1, Tristan L Hartzell, Amit K Pandey
1David Geffen School of Medicine at UCLA, Department of Orthopedic Surgery, Los Angeles, California.
Abstract:
In this report we present a case of allergic dermatitis from chronic use of antibiotic ointment mistakenly diagnosed as a localized finger infection.
Insights
Chronic antibiotic ointment use can cause allergic dermatitis, a condition often misdiagnosed as a finger infection. This case highlights the importance of considering topical medication allergies in persistent skin issues.
Area of Science:
- Dermatology
- Allergology
- Pharmacology
Background:
- Allergic contact dermatitis is an immune response to topical agents.
- Antibiotic ointments are commonly used for skin infections.
- Misdiagnosis can delay appropriate treatment and prolong symptoms.
Purpose of the Study:
- To report a case of allergic dermatitis caused by prolonged antibiotic ointment application.
- To emphasize the differential diagnosis between infection and allergic reaction.
- To highlight the importance of a thorough medication history.
Main Methods:
- Clinical case presentation.
- Review of patient history and symptoms.
- Diagnostic assessment for dermatitis and infection.
Main Results:
- The patient developed allergic dermatitis due to chronic antibiotic ointment use.
- The condition was initially misdiagnosed as a localized finger infection.
- Discontinuation of the offending ointment led to symptom resolution.
Conclusions:
- Allergic contact dermatitis should be considered in cases of persistent or worsening skin lesions, even when infection is suspected.
- A detailed history of topical medication use is crucial for accurate diagnosis.
- Avoiding the causative agent is key to managing antibiotic ointment-induced dermatitis.
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