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Morphological and genetic analysis of three bacteriophages of Serratia marcescens isolated from environmental water

Kenshi Matsushita1, Jumpei Uchiyama, Shin-ichiro Kato

  • 1Department of Pediatrics, Kochi Medical School, Nankoku, Kochi, Japan. matuzaki@kochi-u.ac.jp

FEMS Microbiology Letters
|December 18, 2008
PubMed

Insights

Three novel bacteriophages (KSP90, KSP100) show potential as therapeutic agents against multidrug-resistant Serratia marcescens infections, particularly in neonatal intensive care units. Further research is warranted to explore their efficacy in clinical settings.

Area of Science:

  • Microbiology
  • Virology
  • Infectious Diseases

Background:

  • Multidrug-resistant Serratia marcescens poses a significant threat in pediatric healthcare, especially in neonatal intensive care units.
  • The rise of antibiotic resistance necessitates alternative strategies for controlling bacterial infections.

Purpose of the Study:

  • To isolate and characterize bacteriophages with potential to combat multidrug-resistant Serratia marcescens.
  • To evaluate candidate phages for their therapeutic potential against S. marcescens infections.

Main Methods:

  • Isolation of bacteriophages from environmental water sources.
  • Morphological characterization using electron microscopy.
  • Genetic analysis including DNA sequencing and phylogenetic studies of virion proteins.

Main Results:

  • Three bacteriophages, KSP20, KSP90, and KSP100, were isolated and characterized.
  • KSP20 and KSP90 are morphotype A1 (Myoviridae), and KSP100 is morphotype C3 (Podoviridae).
  • Phylogenetic analysis suggests KSP90 and KSP100 are related to known therapeutic phage groups, indicating their potential as antimicrobial agents.

Conclusions:

  • Bacteriophages KSP90 and KSP100 demonstrate promise as candidate therapeutic agents against multidrug-resistant Serratia marcescens.
  • These findings contribute to the development of phage therapy as an alternative to antibiotics for challenging bacterial infections.

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