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Volume 4, Issue 10

Comparison of clinical severity, genotype and toxin gene expression of binary toxin-producing clinical isolates in Japan Open Access

Abstract

The emerging strain BI/NAP1/027 has been reported to be associated with more severe clinical symptoms and higher mortality rates, thought in part due to production of a novel binary toxin alongside conventional A and B toxins. However, recent studies suggest that this may not always be the case. Therefore, the purpose of this report was to investigate the correlation between clinical severity and microbiological characteristics of CDT-producing isolates in Japan. Eight Japanese isolates of CDT producing were investigated using genotyping, cytotoxic activity assays and toxin gene expression. Correlation with clinical severity was performed retrospectively using the patient record. Three of eight patients were assessed as having severe infection (CDI). PCR ribotyping resolved six ribotypes including ribotype 027. No specific genes were identified determining severe compared with non-severe cases. Positive correlation of expression levels of , and were observed although these expression levels were not correlated with cytotoxicity. CDI severity index neither correlated with toxin gene expression level nor cytotoxicity. These data indicate that the possession of the CDT gene and toxin gene expression levels may not relate to cytotoxicity or clinical severity.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): bacterial toxin , Clostridioides difficile , cytotoxicity test , disease severity and gene expression
© 2022 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License.
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2022-10-20
2024-05-17
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Comparison of clinical severity, genotype and toxin gene expression of binary toxin-producing Clostridioides difficile clinical isolates in Japan
Access Microbiology 4, 000362 (2022); https://doi.org/10.1099/acmi.0.000362
/content/journal/acmi/10.1099/acmi.0.000362
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