Using a diagnostic threshold of 104 cfu/ml, 1 of 33 patients without pneumonia had a false positive result (patient with endobronchial obstruction), and 1 of 13 with pneumonia had a false negative finding (sensitivity and positive predicted value, 97 percent; specificity and negative predicted value, 92 percent). Microscopic analysis had a sensitivity and specificity of 92 and 97 percent from Gram stain and 80 and 100 percent for Giemsa stain. buy ventolin inhalers
The value of BAL in diagnosing tuberculosis and atypical bacterial pneumonia has been investigated in both the normal and in the immunosuppressed host.
The progressive decline of reported cases of tuberculosis in the United States was interrupted in 1985 by the rising number of patients with acquired immunodeficiency syndrome (AIDS) who acquire and spread the infection. Bronchoscopy, although infrequently indicated to diagnose tuberculosis, should be considered for those patients suspected of having the infection, who have negative smears, and whose clinical condition mandates a precise diagnosis and exclusion of other processes. Tuberculosis is an uncommon but treatable cause of nonresolving pneumonia.
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