Open AccessRepetitive elements sequence (REP/ERIC)‐PCR based genotyping of clinical and environmental strains of Yersinia enterocolitica biotype 1A reveal existence of limited number of clonal groups
Author(s) -
Sachdeva Pooja,
Virdi Jugsharan S.
Publication year - 2004
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1016/j.femsle.2004.09.029
Subject(s) - yersinia enterocolitica , biology , genotyping , serotype , dendrogram , genotype , polymerase chain reaction , genetics , genetic diversity , microbiology and biotechnology , dna profiling , yersinia infections , enterobacteriaceae , bacteria , gene , dna , escherichia coli , population , demography , sociology
REP‐ and ERIC‐PCR genotyping were used to assess genetic heterogeneity among 81 strains of Yersinia enterocolitica biotype 1A isolated from India, Germany, France and the USA. Although both gave comparable results, ERIC fingerprints discriminated the strains better. The rep‐ (REP and ERIC) PCR genotyping showed that strains having different serotypes produced identical rep‐profiles indicating their limited genetic diversity. The concatenated dendrogram of REP‐ and ERIC‐PCR fingerprints clustered the biotype 1A strains into two major groups. In each group, majority of the Indian, European and American strains exhibited similarities ranging from 85% to >95%. Similarity of rep‐PCR fingerprints amongst strains isolated from widely separated geographical regions revealed existence of a limited number of clonal groups of Y. enterocolitica biotype 1A. The present study failed to reveal unequivocal relationships between rep‐PCR genotypes and the source of isolation. However, the clinical serotype O:6,30‐6,31 strains formed a tight cluster and the aquatic O:6,30‐6,31 strains formed a yet another tight cluster.