Gender differences in response to the multitest CMI skin test in the general population

Area of Science:

• Immunology
• Public Health

Background:

• Previous research on gender differences in Multitest CMI skin test responses yielded inconsistent findings.
• Understanding these differences is crucial for accurate interpretation of immune status in diverse populations.

Purpose of the Study:

• To investigate potential associations between gender and immune responsiveness as measured by the Multitest CMI skin test.
• To clarify conflicting results from prior studies regarding gender and skin test reactivity.

Main Methods:

• A cohort of 297 adults (aged 18-64) received the Multitest CMI skin test, evaluating responses to six antigens.
• In vitro lymphocyte function was assessed using phytohemaglutinin (PHA), concanavalin A (CON-A), and pokeweed mitogen stimulation.
• Demographic and environmental factors, including exposure to organochlorine pesticides, were recorded.

Main Results:

• Males exhibited a significantly higher frequency of positive skin test responses (80.4%) compared to females (55.7%, P < .001).
• Males demonstrated greater reactivity to all six tested antigens, with statistically significant differences in response size for tetanus and diphtheria.
• These gender-based response patterns persisted after controlling for age, race, smoking, income, and DDE levels.

Conclusions:

• Significant gender disparities exist in Multitest CMI skin test reactivity.
• These findings suggest that the Multitest CMI skin test may not be a universally applicable marker for anergy in general population studies due to gender-based variations.
• Further research may be needed to explore the underlying immunological mechanisms driving these observed gender differences.