Temporal Variability of the Dominant Fecal Microbiota in Healthy Adult Cats
Chi-Hsuan Sung | Sina Marsilio | Rachel Pilla | Yu-An Wu | Joao Pedro Cavasin | Min-Pyo Hong | Jan S. Suchodolski
While shifts in gut microbiota have been studied in diseased states, the temporal variability of the microbiome in cats has not been widely studied. This study investigated the temporal variability of the feline dysbiosis index (DI) and the abundance of core bacterial groups in healthy adult cats. The secondary aim was to evaluate the relationship between the fecal abundance of <i>Clostridium hiranonis</i> and the fecal concentrations of unconjugated bile acids. A total of 142 fecal samples collected from 17 healthy cats were prospectively included: nine cats with weekly collection over 3 weeks (at least four time points), five cats with monthly collection over 2 months (three time points), and three cats with additional collections for up to 10 months. The DI remained stable within the reference intervals over two months for all cats (Friedman test, <i>p</i> > 0.2), and 100% of the DI values (<i>n</i> = 142) collected throughout the study period remained within the RI. While some temporal individual variation was observed for individual taxa, the magnitude was minimal compared to cats with chronic enteropathy and antibiotic exposure. Additionally, the abundance of <i>Clostridium hiranonis</i> was significantly correlated with the percentage of fecal primary bile acids, supporting its role as a bile acid converter in cats.
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