The human navel is home to more than 2,300 different types of bacteria, according to a study

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  • A group of researchers from seven universities in the United States has found more than 2,300 species of bacteria by analyzing 60 samples.
  • “The half navel hosts about 50 species and between navels are thousands of species,” said study leader.

A group of researchers from seven universities in the United States has found more than 2,300 species of bacteria by analyzing 60 samples taken from human umbilical cords, according to a study published in the journal PlosOne. The bacteria, according to scientists, differed more than expected.

“By studying the navels saw a disturbing and immense wealth of life, half navel staying about 50 species and between navels are thousands of species,” writes in the journal Scientific American biologist at the State University of North Carolina (U.S. ) Rob Dunn, who led the study.

“The navels reminded me of a tropical forest,” says Dunn, by correspondence with the “oligarchic hypothesis” of ecology. According to the hypothesis, in the forests there is a great diversity of tree species, but there are a number of species, known as “oligarchs”, which are present in most forests and are more common there.

The navel also have their “oligarchs”, since only eight bacteria were present in over 70% of the samples taken in the study, and nearly half of all bacteria are found in the samples of these eight species.

Thus, the most common bacteria tend to be the most abundant, but none of the more than 2,300 species found in all navels.

The researchers also highlight the finding, “for the first time in human skin”, three species of archaea, microorganisms often live in extreme environments like geysers or acidic waters, two of these three species were found in the navel of a man who said had not bathed in “many years”.

They conclude that “it remains difficult to predict which species of bacteria can be found in a particular human being, predict which species are more common (or rare) seems more straightforward, at least for species that live in navels”.

The study is part of the Belly Button Biodiversity (BBB)-navel-Biodiversity, an initiative of the State University Museum of Natural Sciences and North Carolina (USA), which aims to exploreand publicize “the microbial jungle” that all carry on the skin.

Studying the navel as an example of the biodiversity of the skin because the brand’s birth is a safer haven-where more isolated and less likely rub in the shower for microbes. Microbes, as you remember from the BBB, “mostly are not bad.”

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