[Blood culture in the leptospiroses (author's transl)].

In the early stage of Leptospirae infection there is always blood stream invasion so blood culture is the best diagnostic test and permit precise etiologic identification. In the paper methods and selective media are suggested and the possibility of mistake so called "pseudo Spirochaetes" for Leptospirae is emphasized. Personal experience about the streght of blood culture in comparison with Martin and Pettit serumdiagnostic tests is reported.