[Principles of differential immunodiagnostics in tuberculosis and other pulmonary diseases (author's transl)].

When differential diagnostics between tuberculosis, sarcoidosis, bronchial carcinoma and non-specific pulmonary diseases is not possible with clinical and laboratory methods, diagnosis may be often put by the aid of immunological methods. Differential diagnostics, usually, has not to delimit all these diseases one from another. In most cases it is necessary to differ only between two of these diseases, tuberculosis versus sarcoidosis, tuberculosis or bronchial carcinoma, tuberculosis or non-specific lung disease. By the aid of antibody determination (against streptococci, staphylococci, and pneumococci), determination of Ig and of immunological tests patterns of values for differential diagnostics between these groups of diseases can be elaborated and are shown in this paper.