[Analysis of delayed hypersensitivity to antibiotics].

Area of Science:

• Immunology
• Dermatology
• Pharmacology

Background:

• Delayed hypersensitivity reactions to antibiotics are a significant clinical concern.
• Understanding the prevalence and demographic factors associated with antibiotic hypersensitivity is crucial for patient care.

Purpose of the Study:

• To analyze the prevalence of delayed hypersensitivity to various systemically administered antibiotics in Brazil.
• To investigate demographic differences (sex, race, age) and associations with atopy and other allergic conditions.

Main Methods:

• Contact testing was employed to assess delayed hypersensitivity.
• A range of common antibiotics including sulphanilamide, penicillin, neomycin, oxacillin, oxytetracycline, chloramphenicol, and kanamycin were tested.
• Patient data regarding sex, race, age, and history of allergies were collected.

Main Results:

• Several antibiotics, including sulphanilamide, penicillin, and kanamycin, showed high positivity rates in contact testing.
• Antibiotic hypersensitivity was significantly more prevalent in adults (7.5 times higher) than in children.
• No significant differences in hypersensitivity were observed between sexes or races.
• While a high positivity was noted in atopic patients, no clear association was found with other allergic conditions.

Conclusions:

• Delayed hypersensitivity to commonly used antibiotics is prevalent in the Brazilian population, especially among adults.
• Age is a critical factor influencing antibiotic hypersensitivity, with adults being significantly more affected.
• Further research is needed to elucidate the relationship between antibiotic hypersensitivity, atopy, and other allergic diseases.