Identify human identity by bacteria

The bacteria on human hands are not the same, so they can be used to identify forensics like DNA and fingerprints.

On the hands of the cleanest people, there are always at least 150 species of bacteria at all times.Photo: verdicsciences.net.

A group of experts from the University of Colorado, USA affirmed that the "microbial community" on the skin of each individual has a unique trait, not unlike any other. These unique characteristics can become new tools in identifying people.

The BBC said Noah Fierer, an expert at the University of Colorado, conducted an experiment to prove the statement. They took a sample of bacteria on the computer keyboard of three volunteers and found out the specific characteristics of each sample. Then they took a sample of bacteria on the hands of three people. The results show that bacteria samples on the hands of each person are exactly like the patterns on the keyboard.

The same thing happens when the expert team takes samples from the hands and computer keyboards of people they meet randomly.

Scientists also found that bacteria can survive in high temperatures for up to two weeks. Even if the fingerprint is fuzzy or the amount of DNA is not large enough for forensic analysis, they can still identify bacteria.

The research team affirmed that the technology of identification by bacteria has an accuracy of about 70-90% and this rate will gradually increase over time. It can become an additional tool to reinforce the credibility of other evidence.

On the hands of the cleanest people in the world, there are still about 150 types of bacteria that exist at all times. Their numbers do not increase or decrease significantly when owners wash their hands.

The same twins can have identical DNA, but the bacterial 'communities' on their hands are still different.

'The findings suggest that the genes of human microbes are more reliable than human genes , ' the team concluded.