In 2012, 3 scientists from the University of California, San Diego, started The American Gut Project, the largest crowd funded “citizen science project in existence.”[i] Ordinary people can send in a stool sample along with a questionnaire (about diet and lifestyle choices), and $99 USD, and receive back an analysis of their bacterial microbiomes – while at the same time, providing valuable data to the team of researchers involved. To date, they have analyzed the microbiomes of more than 11,300 (anonymous) people from the USA, UK, Australia, and 42 other countries around the world.
Some results were just published in their new study[ii]:
None of this is a huge surprise, except maybe the information about the antibiotic- resistant bacteria differences, which I found particularly interesting. I remember sitting at the 1st International Symposium on the Microbiome in Health and Disease with a special Focus on Autism, at Arkansas Children’s Hospital in Little Rock, listening to Dr. Carl Cerneglia, of the FDA, explaining to us that “antimicrobial residues in foods makeup a small fraction of total antimicrobials to which persons are exposed to in terms of either frequency or dose.”[iv] He went on to conclude, “An extensive literature review DID NOT reveal reports of human health effects from exposure to antimicrobial drug residues that could result in changes in the proportion of antimicrobial resistant bacteria in the normal human intestinal microbiota.”
I think I will personally continue to buy only meat that is antibiotic free. Call me crazy….
[ii] McDonald, D. et. al. American Gut: an Open Platform for Citizen Science. mSystems. 2018. DOI: 10.1128/mSystems.00031-18