[Solid-phase immunoenzyme analysis in the differential diagnosis of pulmonary tuberculosis and other infectious diseases with respiratory organ involvement].

The authors studied the information efficiency of stable-phased immunofermental analysis (IFA) in differential diagnosis of infectious diseases of respiratory system and pulmonary tuberculosis. IFA method was used on 60 infectious patients with non-tuberculous pathology, 64 patients with pulmonary tuberculosis and 200 donors. It was found out that the minimal diagnostical IFA titer in pulmonary tuberculosis was 1:320 (antibody revealing frequency--up to 89.2%; specificity--95%). IFA method with phosphatide antigen has a great practical significance in differential diagnosis of influenza, acute respiratory viral infections and pneumonias with pulmonary tuberculosis.