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USING SURFACE WASHING TO REMOVE THE ENVIRONMENTAL COMPONENT FROM FLEA MICROBIOME ANALYSIS.

Ramya Sridhar1,2, Katharina Dittmar1, Heather M Williams1,3

  • 1Department of Biological Sciences, State University of New York at Buffalo, Buffalo, New York 14260.

The Journal of Parasitology
|June 10, 2022
PubMed
Summary
This summary is machine-generated.

Surface washing flea samples effectively removes environmental contaminants, masking microbiome shifts caused by nest conditions. This method is crucial for accurately analyzing arthropod microbiomes and understanding pathogen transmission.

Keywords:
16S rRNACeratophyllus idiusBird fleaEnvironmental bacteriaMicrobiomePurple martinSurface washing

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Area of Science:

  • Microbiology
  • Ecology
  • Entomology

Background:

  • Microbial metabarcoding analyzes arthropod microbiomes for pathogen transmission insights.
  • Surface washing is a common pre-DNA extraction step to eliminate contaminants.
  • The impact of surface washing on arthropod microbial diversity is not well understood.

Purpose of the Study:

  • To investigate the effects of surface washing on the microbiome of the flea Ceratophyllus idius.
  • To determine if surface washing obscures environmentally induced changes in flea microbiomes.
  • To assess the efficacy of surface washing in removing environmental microbial contaminants.

Main Methods:

  • High-throughput 16S rRNA sequencing was used to characterize flea microbiomes.
  • A crossed study design involved environmental manipulation (nest material replacement) and surface washing.
  • Four experimental conditions were established: control, environmental manipulation only, surface washing only, and both.

Main Results:

  • Environmental manipulation significantly altered flea microbiome diversity and structure.
  • Surface washing rendered these environmentally induced microbiome differences undetectable.
  • Surface washing primarily reduced the abundance of known environmental bacterial contaminants.

Conclusions:

  • Environmental changes impact the external microbiome of arthropods like fleas.
  • Surface washing is an effective method to minimize the influence of external microbial contaminants in analyses.
  • This technique aids in clarifying the true host-associated microbiome and potential pathogen dynamics.