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[Qualitative and quantitative researches into bacterial flora of respiratory apparatus (author's transl)].

The first group of data illustrated in this research concern the isolation's frequencies of bacterial strains from 7000 samples of respiratory materials examinated in two years, 1973 and 1974, by two different techniques. Significant differences were observed in the isolation's percentage of various bacterial strains; these differences, at least partly, can be attributed at the different techniques employed in two years. The second group of data is represented by results of bacterial quantitation performed in 100 samples of purulent sputum, with respectives clinical notes unknown. Potentially pathogenous strains in pure culture and at a concentration of 10(7) or higher were isolated only in 16 samples of sputum in the other samples normal bacterial flora was isolated alone or associated with potentially pathogenous strains.