Nitric Oxide Laboratory Animal Allergy Study

This study is looking at whether working regularly with laboratory animals causes airway inflammation that can be detected by measuring a gas in the breath called nitric oxide. People who work with animals in laboratories may develop allergies over time, and this study aims to find an early, non-invasive way to detect these allergic changes before they cause symptoms. You may be eligible if: - You work with laboratory animals at least 2 days per week - You have been doing this work for at least 6 months You may NOT be eligible if: - You have taken oral or inhaled steroids in the last 6 weeks Talk to your doctor about whether this trial might be right for you.