American Review of Respiratory Disease

Forty-six patients with positive sputum cultures for Mycobacterium avium complex and cavitary disease were placed on a 4-drug regimen consisting of isoniazid, rifampin, and ethambutol daily and streptomycin twice weekly. Forty-two (91.3%) converted their sputum to negative and 4 (8.7%) failed to convert. All of the 4 nonconverters had prior subtotal gastrectomy. Twenty-two patients were available for long-term follow-up: 12 patients completed 24 months of chemotherapy, all experienced sputum conversion, but 2 reactivated, 1 at 9 and the other at 27 months after termination of chemotherapy. These 2 patients had prior subtotal gastrectomy. Ten patients completed 18 months of chemotherapy with sputum conversion, 2 of by Mycobacterium avium complex.

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