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. 1994 Dec;32(12):2989–2994. doi: 10.1128/jcm.32.12.2989-2994.1994

Molecular fingerprinting of Legionella species by repetitive element PCR.

P R Georghiou 1, A M Doggett 1, M A Kielhofner 1, J E Stout 1, D A Watson 1, J R Lupski 1, R J Hamill 1
PMCID: PMC264212  PMID: 7883887

Abstract

Repetitive element PCR (rep-PCR) uses outward-facing primers to amplify multiple segments of DNA located between conserved repeated sequences interspersed along the bacterial chromosome. Polymorphisms of rep-PCR amplification products can serve as strain-specific molecular fingerprints. Primers directed at the repetitive extragenic palindromic element were used to characterize isolates of Legionella pneumophila and other Legionella species. Substantial variation was seen among the rep-PCR fingerprints of different Legionella species and serogroups. More limited, but distinct, polymorphisms of the rep-PCR fingerprint were evident among epidemiologically unrelated isolates of L. pneumophila serogroup 1. Previously characterized Legionella isolates from nosocomial outbreaks were correctly clustered by this method. These results suggest the presence of repetitive extragenic palindromic-like elements within the genomes of members of the family Legionellaceae that can be used to discriminate between strains within a serogroup of L. pneumophila and between different Legionella species. rep-PCR appears to be a useful technique for the molecular fingerprinting of Legionella species.

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Selected References

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