JUN 17, 2018 12:12 PM PDT

Humans & Mammals Have Very Different Skin Microbiomes

WRITTEN BY: Carmen Leitch

You may know that humans have many genes in common with other species. New research has shown that one place where we diverge from other organisms, however, is in the composition of the microbiome, the communities of fungi, viruses, and bacteria that live in and on us and animals. This research surprised the scientists, who think these findings may have important implications for the study of health and immunity. The work was reported in the journal Proceedings of the National Academy of Sciences

"We were quite surprised when we saw just how distinct we humans are from almost all other mammals, at least in terms of the skin microbes that we can collect with a swab," said senior study author Josh Neufeld, a professor of biology at the University of Waterloo.

A team of researchers from the University of Guelph and the University of Waterloo performed a comprehensive assessment of the microorganisms carried by mammals. They found that the microbes that are present on human skin are far less diverse than what is observed on other mammals. That probably has a lot to do with our typical routines and habitats, which are obviously vastly different from what animals, even those in zoos, experience.

"The first line that gets hit by modern hygienic practices is our skin," explained Ashley Ross, a co-author of the study and a graduate student at Waterloo at the time of the research. "Our skin is the largest organ of the body and the main barrier to the external environment."

Image credit: CDC/Max Pixel

Our environments, including our clothes and bathing habits, probably have a major influence on the microbes that live on human skin. After taking samples from 177 mammals, the investigators connected the environment that a mammal resides in with the microbes on their skin.

In a phenomenon called phylosymbiosis, patterns in the evolution of microbial communities are linked to the evolution of the organisms that host them. That does not necessarily mean organisms evolve along with its microbiome, but it may. The researchers removed humans from their study of phylosymbiosis because our skin microbiomes are so much different from other mammals, but they did find evidence of it.

"We were able to measure phylosymbiosis between some of the mammalian classes and the corresponding communities on their skin," said study co-author Kirsten Müller, a biology professor at Waterloo. "It's exciting that we can still see this signal despite the contribution of habitat to the skin microbial community."

The researchers plan to continue this work. J. Scott Weese, a professor at Guelph, wants to learn more about how skin microbiomes may have coevolved with their hosts. The objective is to find out if that coevolution is driving phylosymbiosis.

Learn more about phylosymbiosis from the video.

Sources: Phys.org via University of Waterloo, PNAS

About the Author
  • Experienced research scientist and technical expert with authorships on 28 peer-reviewed publications, traveler to over 60 countries, published photographer and internationally-exhibited painter, volunteer trained in disaster-response, CPR and DV counseling.
You May Also Like
MAR 17, 2020
Genetics & Genomics
MAR 17, 2020
Targeting RNA With CRISPR
Researchers screened thousands of target molecules to find the most effective targets, and have made their data openly a ...
MAR 22, 2020
Microbiology
MAR 22, 2020
The Benefits of Being a Loner
Outliers exist everywhere in nature, and it seems they serve an important purpose.
MAR 23, 2020
Microbiology
MAR 23, 2020
The Loss of a Sense of Smell May be a Major Symptom of COVID-19
The loss of the sense of smell may be a symptom of a COVID-19 infection in people with no other symptoms.
APR 12, 2020
Microbiology
APR 12, 2020
Are Ventilators Making Some COVID-19 Patients Worse?
COVID-19 is primarily a respiratory illness, and ventilators have been critical for treating COVID-19.
MAY 04, 2020
Microbiology
MAY 04, 2020
How Soap and Hand Sanitizer Kill Viruses
The COVID-19 pandemic has spread around the world and there is still no available treatment or a vaccine. Prevention rem ...
MAY 06, 2020
Cell & Molecular Biology
MAY 06, 2020
SARS-CoV-2 Can Infect Intestinal Cells
Once thought to cause symptoms that primarily affect the respiratory system, there has been evidence that the virus can ...
Loading Comments...