The present invention relates to assays, kits and oligonucleotides for the detection of Pseudomonas aeruginosa for a fast, sensitive and reliable detection of Pseudomonas aeruginosa in a species- and serotype-specific manner. In particular, the present invention provides an assay for the serotype-specific detection of Pseudomonas aeruginosa, a kit for the serotype-specific detection of Pseudomonas aeruginosa, as well as oligonucleotides useful in such assay or kit. The present invention further relates to the use of Pseudomonas aeruginosa serotype specific antibodies for serotype specific treatment of Pseudomonas aeruginosa infection in a patient detected for said specific Pseudomonas aeruginosa serotype with such an assay or kit.