The rrn locus and gyrB genotyping confirm the existence of two clonal groups in strains of Yersinia enterocolitica subspecies palearctica biovar 1A

• Published in: Research in microbiology Vol. 158; no. 3; pp. 236 - 243
• Main Authors: Gulati, Pooja Sachdeva, Virdi, Jugsharan Singh
• Format: Journal Article
• Language: English
• Published: Paris Elsevier SAS 01.04.2007; Elsevier
• Subjects: Bacterial Proteins - genetics; Bacteriology; Biological and medical sciences; DNA Gyrase - genetics; DNA, Bacterial - chemistry; DNA, Bacterial - genetics; DNA, Ribosomal - chemistry; DNA, Ribosomal - genetics; Fundamental and applied biological sciences. Psychology; Genotype; gyrB RFLP; Microbiology; Miscellaneous; Molecular Sequence Data; PCR-ribotyping; Polymerase Chain Reaction; Polymorphism, Restriction Fragment Length; Ribotyping - methods; RNA, Ribosomal, 16S - genetics; RNA, Ribosomal, 23S - genetics; Sequence Analysis, DNA; Yersinia enterocolitica; Yersinia enterocolitica - classification; Yersinia enterocolitica - genetics; Yersinia enterocolitica biovar 1A; gyrB RFLP; PCR-ribotyping; Yersinia enterocolitica biovar 1A; Polymerase chain reaction; Yersinia enterocolitica; Ribotype; Typing; Microbiology; Bacteria; Genotype; Enterobacteriaceae; Strain
• ISSN: 0923-2508; 1769-7123
• DOI: 10.1016/j.resmic.2006.11.011

Eighty-one strains of Yersinia enterocolitica biovar 1A representing several serotypes isolated from India, France, Germany and the USA were analyzed using ribotyping, 16S–23S rDNA intergenic spacer length polymorphism analysis (PCR-ribotyping) and gyrB restriction fragment length polymorphism. Ribotyping with BglI, NciI and EcoRV distinguished 81 strains into 4, 3 and 2 ribotypes respectively. BglI- NciI combination gave the highest Simpson's diversity index (DI = 0.43). Strains with identical ribotypes were further differentiated by PCR-ribotyping. The combination of BglI- NciI ribotyping with PCR ribotyping increased DI to 0.72. This suggested that the combination of the two may be used for molecular epidemiological studies of Y. enterocolitica biovar 1A. This approach clearly resolved the strains into two clonal groups, each comprising strains isolated from humans, swine, pork and wastewater. PCR-RFLP of the gyrB gene using three enzymes ( AluI, MspI and HinfI) distinguished strains into seven types and confirmed the existence of two clonal groups. Thus, assessment of heterogeneity based on chromosomal restriction analysis (ribotyping), rRNA spacer length polymorphism (PCR-ribotyping) and gyrB gene analysis were in concordance and provided unequivocal evidence for the presence of two groups amongst strains of Y. enterocolitica biovar 1A despite their diverse geographic origins. These data also grouped clinical and non-clinical strains of serotype O:6,30–6,31 into discrete subgroups.