The invention relates to a method for detecting bacterial contaminations preferably in physiological samples as well as sequences of synthetic oligonucleotides used therefor. The method comprises the steps of i) extracting the nucleic acid, particularly bacterial DNA, ii) amplification by means of primers and detection by means of oligonucleotides, particularly fluorescence-marked oligonucleotides as hybridization probes, containing a sequence that is selected from among a group encompassing SEQ ID NO:5 to SEQ ID NO:35, preferably in real-time PCR, and iii) evaluation by means of fusion curve analysis.