Analyses of propagation processes of Staphylococcus aureus bacteriophages S13′ and S25-3 in two different taxonomies by definitive screening design

Ippei Takeuchi, Tadahiro Nasukawa, Ryosuke Sugimoto, Iyo Takemura-Uchiyama, Hironobu Murakami, Jumpei Uchiyama

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

To introduce phage therapy against multidrug-resistant Staphylococcus aureus in Western medicine, the establishment of phage manufacturing, particularly phage propagation, is indispensable. For the propagation of S. aureus phages, knowledge of the effects of phage types, process parameters, and analytical methodologies should be investigated. In this study, S. aureus phage propagations were studied in a flask with a new class of design of experiments, definitive screening design, using S. aureus phages S13′ and S25-3 in different taxonomies. Four process parameters, namely, multiplicity of infection, bacterial density at infection, time of harvest, and temperature, were evaluated with the regression models based on the phage concentration data measured using plaque assay and quantitative polymerase chain reaction. As a result, phage propagations measured using plaque assay and quantitative polymerase chain reaction were overall similar to each other in the case of phage S13′, while they differed in the case of phage S25-3. These results suggest that the propagation processes need to be developed according to phage type, and the choice of methodologies for phage concentration measurements should be carefully considered.

Original languageEnglish
Article number198406
JournalVirus research
Volume298
DOIs
Publication statusPublished - Jun 2021
Externally publishedYes

Keywords

  • Bacteriophage propagation
  • Definitive screening design
  • Design of experiments
  • Phage therapy
  • Process development
  • Staphylococcus aureus

ASJC Scopus subject areas

  • Virology
  • Infectious Diseases
  • Cancer Research

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