The study was trying to determine whether there was a risk of humans picking up a dog-borne disease from an MRI scanner also used for examinations by vets, the Mail On Sunday reports.
In examining the beards of 18 men and the necks of 30 dogs from a number of breeds, scientists found that even hounds had lower levels of microbes than the beards surveyed.
Professor Andreas Gutzeit, of Switzerland’s Hirslanden Clinic, said: “The researchers found a significantly higher bacterial load in specimens taken from the men’s beards compared with the dogs’ fur.”
The study found all of the bearded men, aged from 18 to 76, showed high microbial counts, while only 23 out of 30 dogs had high counts, and the remainder had moderate levels.
Seven of the men were shown to have bugs hazardous to human health.
The scanners were disinfected after the dogs were examined on the MRI scanner, showing a “significantly” lower bacteria count compared with levels seen when used by humans.
ht/ fdr in hell