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Table 5 Frequency of Negative Acid-Fast Bacilli Smear and Extrapulmonary Involvement.*

From: Mycobacterial and nonbacterial pulmonary complications in hospitalized patients with human immunodeficiency virus infection: A prospective, cohort study

  Incidence
Variable MTB MAC
Sputum AFB smear negative 15/35 (43%) 38/45 (84%)
BAL AFB smear negative 4/8 (50%) 6/6 (100%)
Extrapulmonary involvement   
   Blood 4 27
   Gastrointestinal tract 5 26
   Bone marrow 1 4
   Lymph node 4 1
   Cerebrospinal fluid 3 1
   Soft tissue 2 -
  1. *AFB = acid-fast bacilli; BAL = bronchoalveolar lavage; MAC = Mycobacterium avium complex; MTB = Mycobacterium tuberculosis.