Open AccessClinical Application of the DiversiLab Microbial Typing System Using Repetitive Sequence‐Based PCR for Characterization of Helicobacter pylori in Japan
Author(s) -
Morimoto Norihito,
Takeuchi Hiroaki,
Nishida Yoshie,
Morisawa Mie,
Yoshikawa Tomoe,
Morita Tamae,
Morimoto Miyuki,
Sugimoto Chizuko,
Matsumura Yoshihisa,
Sugiura Tetsuro
Publication year - 2015
Publication title -
journal of clinical laboratory analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 50
eISSN - 1098-2825
pISSN - 0887-8013
DOI - 10.1002/jcla.21758
Subject(s) - amoxicillin , clarithromycin , polymerase chain reaction , helicobacter pylori , typing , microbiology and biotechnology , metronidazole , biology , drug resistance , antibiotics , genetics , gene
We evaluated the DiversiLab (DL) system with universal primers, a semiautomated repetitive extragenic palindromic sequence‐based polymerase chain reaction (PCR) (rep‐PCR) system, for the characterization of Helicobacter pylori in Japan. All 135 isolates from Japanese patients with gastric cancer (GC, n = 55) or non‐GC ( n = 80) were used and subjected to the drug susceptibility examinations (amoxicillin, AMPC; metronidazole, MNZ; and clarithromycin, CAM) by E‐test. There were 28 MNZ‐resistant (20.7%), 35 CAM‐resistant (25.9%), and 16 MNZ/CAM‐resistant (11.9%) isolates. DL rep‐PCR fingerprinting analysis at the level of 95% similarity revealed five major groups (A–E) and the other including 45 isolates. The occupation rates of GC‐derived isolates in groups B (54.2%) and E (58.8%) were higher than in the other groups: A (26.7%), C (28.6%), D (30.0%), and the other (40.0%). Relative higher occupation rates of drug resistants, such as MNZ‐, CAM‐ and double MNZ/CAM‐resistant isolates, were observed in groups B (45.8%), C (42.6%), and D (40%). Five of eight GC‐derived isolates with MNZ/CAM resistance were significantly assigned to group B ( P = 0.0312, χ 2 ‐test). These results suggest that the isolates classified in group B have a potential to contribute to the development of severe gastric disorders. The DL system, rapid and high sensitive technology, would be widely available in clinical laboratory for pathological and epidemiological analyses even in H. pylori .