Patent ID: 8415105

Claim:
A method to determine whether a Legionella pneumophila strain is a pathogenic strain or a non-pathogenic strain in a sample containing Legionella pneumophila , wherein said method comprises the steps of: a) subjecting said sample to an assay that detects the presence or absence in said sample of at least one of a first polynucleotide comprising the sequence of SEQ ID NO:1 or 2 or that comprises a sequence that has at least 95% identity with SEQ ID NO:1 or 2; b) subjecting said sample to an assay that detects the presence or absence in said sample of a at least one of second polynucleotide comprising the sequence of SEQ ID NO:3 or 4 or that comprises a sequence that has at least 95% identity with SEQ ID NO:3 or 4; and c) determining that said strain is pathogenic if the first polynucleotide is present and the second polynucleotide is absent, or determining that said strain is non-pathogenic if the first polynucleotide is absent and the second polynucleotide is present.