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Evaluation of growth and sporulation of a non-toxigenic strain of Clostridioides difficile (Z31) and its shelf viability

  • Carlos Augusto Oliveira Júnior
  • Rodrigo Otávio Silveira SilvaEmail author
  • Diogo Soares Gonçalves Cruz
  • Isadora Honorato Pires
  • Guilherme Guerra Alves
  • Francisco Carlos Faria Lobato
Fungal and Bacterial Physiology - Research Paper

Abstract

The oral administration of non-toxigenic strains of Clostridioides difficile (NTCD) is currently showing promising results for the prevention of Clostridioides difficile infection (CDI) in humans and animals, and is being considered as a possible commercial product to be used in the near future. The aim of this work was to evaluate five culture media for the growth and sporulation of one NTCD (Z31) and evaluate the viability of a lyophilized spore solution of NTCD Z31 stored at 4 °C or at 25 °C for 2 years. Reinforced clostridial medium (RCM) and brain heart infusion broth (BHI) provided the highest production of NTCD Z31 spores. In the first 6 months of the storage of the lyophilized solution, a reduction in spore count of approximately 0.3 Log10 CFU/mL was observed; however, no further significant reduction in spore count was observed up to 24 months. No difference in spore concentration was found between the two storage temperatures from 6 to 24 months of storage. The present work showed BHI and RCM to be the best choices for the growth and sporulation of NTCD Z31 and suggested that the spores of NTCD Z31 are stable for up to 2 years under both temperature conditions.

Keywords

Probiotic Culture media Long-term viability Spores 

Notes

Funding information

The authors would like to thank PRPq-UFMG, Fapemig, Capes/Proex, and CNPq for providing financial support in this work.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Sociedade Brasileira de Microbiologia 2018

Authors and Affiliations

  • Carlos Augusto Oliveira Júnior
    • 1
  • Rodrigo Otávio Silveira Silva
    • 1
  • Diogo Soares Gonçalves Cruz
    • 1
  • Isadora Honorato Pires
    • 1
  • Guilherme Guerra Alves
    • 1
  • Francisco Carlos Faria Lobato
    • 1
  1. 1.Veterinary SchoolFederal University of Minas GeraisBelo HorizonteBrazil

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