Karin A. Pacheco, MD, is an allergist at National Jewish Health. Dr. Pacheco is in the Division of Environmental and Occupational Health Sciences. Clinical Interests: Occupational asthma and allergies. Challenge Chamber for diagnosis of Occupational Asthma. Dr. Pacheco specializes in the diagnosis and treatment of occupational asthma and allergic disease. She performs specific occupational allergen challenges to help diagnose occupational asthma as well as specific skin and patch testing to occupational allergens. Research Interests: Genetic and environmental risk factors for asthma and allergy to laboratory animals in exposed research scientists and technicians.