Abstract: The invention is in the technical field of detecting nucleic acid sequences in a sample, such as the detection of pathogenic organisms in clinical samples. More specifically, the invention relates to the field of detecting an infection caused by a pathogenic organism such as a virus or a bacterium in a clinical specimen by means of amplifying and detecting specific nucleic acid sequences from said pathogenic organism. It provides a multiplex assay with the possibility to determine about 30 different target nucleic acid sequences in a single one-tube assay combined with real-time probe detection. The method employs multiplex ligation dependent Probe Amplification (MLPA) employing labelled primers in combination with labelled, probes and detection of the fluorescence.