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Updated: Dec 31, 2025

Intradermal Inoculation of Mycobacterium avium in the Mouse Ear
Published on: July 3, 2025
A 71-year-old man with recurrent pulmonary mycobacterial avium complex infections and lymphopenia
Taha Al-Shaikhly1, Frederick S Buckner1, Matthew C Altman1
1From the Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, Washington.
Abstract:
Mycobacterium avium complex (MAC) infections, generally viewed as opportunistic infections, often trigger an evaluation for an underlying immunodeficiency disorder. However, MAC infections can occur in patients who presumably are immunocompetent, particularly in those with an underlying structural lung disease. T-cell immunity plays a critical role in controlling MAC infection. We presented a case of lymphopenia, which complicated the clinical course of a pulmonary MAC infection in a patient who was negative for human immunodeficiency virus.
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