Shaping the human gut microbiota: The role of canine companionship, lifestyle choices, and <i>Blastocystis</i> spOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
Researchers examined how dog ownership, urban versus village living, and the gut protist Blastocystis sp. relate to human gut bacterial composition. They also compared human gut microbiota to that of dogs in the same households.
How was it studied?
Fecal DNA from 118 humans and 54 dogs in the Czech Republic was analyzed by 16S rRNA gene sequencing on the Illumina MiSeq platform. Samples were grouped by dog contact, urban or village residence, and Blastocystis sp. status, then compared for microbial diversity and composition.
What did they find?
Humans showed greater microbial diversity than dogs, and owning a dog did not significantly change alpha or beta diversity in humans, though certain bacterial genera were enriched in dog owners. Village residents had more diverse gut microbiota than city residents, while urban dwellers had higher levels of Akkermansia. The presence of Blastocystis sp. correlated with distinct microbial patterns in the human gut.
Why it matters
The findings suggest lifestyle and environment shape the gut microbiota more consistently than dog ownership alone, and point to Blastocystis sp. as a potentially meaningful player in gut ecosystem structure rather than simply a pathogen.