Table 2: Patient demographics, predisposing condition, and treatment course.

Case  1Case  2Case  3Case  4

Age (years)73697978

SexFemaleFemaleFemaleFemale

Predisposing conditionCOPD and concurrent steroid useBronchiectasisCOPD and MAC colonization with bronchiectasisMAC colonization

PathogenNocardia cyriacigeorgicaNocardia cyriacigeorgicaNocardia cyriacigeorgicaNocardia nova

TreatmentTrimethoprim/
Sulfamethoxazole
Inhaled Tobramycin and oral LinezolidTrimethoprim/
Sulfamethoxazole
Observation

Duration6 months8 weeks11 monthsContinued observation

COPD: chronic obstructive pulmonary disease; MAC: Mycobacterium avium-intracellulare complex.