We analyzed Burkholderia cepacia complex isolates recovered from 1,218 cystic fibrosis (CF) patients and 90 patients without CF. Although all B. cepacia complex species were found, some were rarely identified. The distribution of species differed between the CF and non-CF populations and appears to be changing over time among CF patients.
Two new PCR assays (for Ralstonia species and Ralstonia respiraculi), together with previously published PCR assays, were used to assess Ralstonia isolates recovered from 111 cystic fibrosis patients. Ralstonia mannitolilytica accounted for 46% of isolates, while R. respiraculi and Ralstonia pickettii accounted for 19% and 18%, respectively. Ralstonia basilensis and Ralstonia metallidurans, species not previously recovered from human samples, were also identified.
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