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Cellvibrio fontiphilus sp. nov., isolated from a spring.

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A novel bacterial species, Cellvibrio fontiphilus MVW-40T, was discovered in Taiwan. This Gram-negative bacterium exhibits unique physiological traits and genetic characteristics, distinguishing it as a new member of the Cellvibrio genus.

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Area of Science:

  • Microbiology
  • Bacteriology
  • Taxonomy

Background:

  • The genus Cellvibrio comprises Gram-negative bacteria known for their roles in decomposition.
  • Characterization of novel bacterial isolates is crucial for understanding microbial diversity and ecological functions.

Purpose of the Study:

  • To isolate and characterize a novel bacterial strain from a Taiwanese hot spring.
  • To determine the phylogenetic and taxonomic position of the novel isolate within the genus Cellvibrio.

Main Methods:

  • Polyphasic taxonomy approach, including 16S rRNA gene sequencing and DNA-DNA hybridization.
  • Analysis of phenotypic characteristics such as cell morphology, growth conditions, and fatty acid composition.
  • Determination of genomic DNA G+C content.

Main Results:

  • Strain MVW-40T, isolated from Maolin Spring, Taiwan, is a Gram-negative, aerobic, motile, yellow-pigmented rod.
  • Phylogenetic analysis based on 16S rRNA gene sequences placed MVW-40T within the genus Cellvibrio, with high similarity to Cellvibrio mixtus subsp. mixtus and Cellvibrio fibrivorans.
  • DNA-DNA hybridization values were below 45%, supporting its classification as a distinct species.
  • Predominant fatty acids included summed feature 3, C16:0, and C18:1ω7c. The DNA G+C content was 52.8 mol%.

Conclusions:

  • Strain MVW-40T represents a novel species within the genus Cellvibrio.
  • The proposed name for this new species is Cellvibrio fontiphilus sp. nov.
  • The type strain is MVW-40T (=BCRC 80977T=LMG 29557T=KCTC 52237T).