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Canine endometrial and vaginal microbiomes reveal distinct and complex ecosystems

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  • C C Lyman
  • G R Holyoak
  • K Meinkoth
  • X Wieneke
  • K A Chillemi
  • U DeSilva

Abstract

The objective of this study was to characterize the normal microbiome of healthy canine vagina and endometrium and to determine the effect of the stage of estrous, on the resident microbiome. Cranial vaginal swabs and uterine biopsy samples were collected from twenty-five bitches in five different stages of estrous at elective ovariohysterectomy (OVH). Over 4 million reads of the V4 region of 16S rDNA gene were obtained and used for further analyses. A total of 317 genera belonging to 24 known phyla were identified. The endometrium was higher in bacterial diversity while the vagina was higher in richness. Proteobacteria, Bacteroidetes and Firmicutes were the most abundant phyla observed across all samples. Hydrotalea, Ralstonia, and Fusobacterium accounted for nearly 60% of the OTUs identified in the vagina while organisms identified in the endometrium were more evenly distributed. Pseudomonas, Staphylococcus, and Corynebacterium were the prominent genera in the endometrium. The microbiome of the endometrium was distinctly different from that of the vagina. There was large animal-to-animal variation. Other than the vaginal microbiome of bitches in estrus (i.e. in heat), there were no distinct clustering of the organisms based on the stage of estrous. These findings establish the presence of a resident microbiome of the endometrium throughout all stages of estrous cycle.

Suggested Citation

  • C C Lyman & G R Holyoak & K Meinkoth & X Wieneke & K A Chillemi & U DeSilva, 2019. "Canine endometrial and vaginal microbiomes reveal distinct and complex ecosystems," PLOS ONE, Public Library of Science, vol. 14(1), pages 1-17, January.
  • Handle: RePEc:plo:pone00:0210157
    DOI: 10.1371/journal.pone.0210157
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    References listed on IDEAS

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    2. Tao Ding & Patrick D. Schloss, 2014. "Dynamics and associations of microbial community types across the human body," Nature, Nature, vol. 509(7500), pages 357-360, May.
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