Photosensitivity in HIV-infected individuals

Area of Science:

• Dermatology
• Infectious Diseases
• Immunology

Background:

• Photosensitivity is a recognized complication in some HIV-infected individuals.
• Eosinophilic folliculitis (EF) is a skin condition associated with advanced HIV disease.
• Understanding photosensitivity mechanisms in HIV is crucial for patient management.

Purpose of the Study:

• To investigate photosensitivity in HIV-infected individuals using ultraviolet A (UVA) and ultraviolet B (UVB) photoprovocation testing.
• To determine the specific wavelengths of light triggering photosensitivity reactions.
• To explore potential risk factors, including ancestry and co-existing conditions like EF.

Main Methods:

• A prospective, controlled analytical study was conducted.
• Participants included HIV-seropositive patients with photodermatitis, EF, and a control group with low CD4 counts.
• Minimal Erythema Dosage (MED) testing for UVB and full photochallenge testing with UVA and UVB were performed.

Main Results:

• Patients with photosensitivity and EF showed a lower mean MED to UVB compared to controls.
• UVB light provoked reactions more frequently (9/13) than UVA light (3/13) in the photodermatitis group.
• Native American ancestry was noted in a significant portion of photosensitive patients (7/13).

Conclusions:

• Photosensitivity in HIV infection often signifies advanced disease, primarily reacting to UVB.
• Severe cases may exhibit sensitivity to both UVA and visible light.
• Native American ancestry is a potential risk factor, and EF patients may have subclinical photosensitivity.