Ed. Print THE YANOMAMI HAVE NO CONTACT WITH THE EXTERIOR
The Indians have the most diverse colonies of bacteria ever detected within the human body. – Afp Agency
Washington <- - end pub!> |
The Yanomami indigenous people inhabiting the Venezuelan Amazon without external contact has a microbiome with the level higher bacterial diversity never before recorded in a group of human beings and antibiotic resistant genes, according to a study published in the journal “Science”.
“What this finding suggests is that from the very steps Early in acculturation, humans lose diversity of microorganisms by antibacterial practices as antibiotics, cesarean delivery, soaps, or dental fluoride, “said one of the researchers, the Venezuelan Maria Gloria Dominguez-Bello.
” Now we have to find out what the missing bodies are and what their function, and whether it would be useful to recover them. These revelations help us understand where we are in relation to what were our ancestors, “said microbiologist at the University of New York (NYU ).
The microbiome are bacteria and other microorganisms that inhabit the human body and that evolved with man.
Scientists consider particularly surprising that the microbiome of this indigenous group has genes antibiotic resistance, as it is believed that yanomami never exposed to commercial antibiotics.
“These disclosures supplement evidence suggesting that westernization is associated with loss of bacterial diversity, while suggesting that equipped to resist antibiotics genes may be a natural feature of the human microbiome, “the study said.
Although there are now more scientific evidence that the microbiome plays an important role in the health of Being human, there are few studies on how the composition of bacterial communities in human has changed as diet and lifestyle of the West in other parts of the world is widely adopted.
“The study of the practices outside Western populations may help researchers to characterize the microbiomes most resemble those of our ancestors and understand the benefits of hosting an extensive microbial diversity, “say the researchers. Thousands of years later, the Yanomami continue to live a lifestyle partially nomadic hunter-gatherers in the Amazon jungle of Venezuela and Brazil.
In 2008, a military helicopter saw a Yanomami village never before identified in maps, after a year, a medical mission landed there and got fecal samples, skin and buccal smear material, 34 people (aged between 4 and 50).
The smear is a mechanism scientist who is paving a drop of blood on the surface of a slide for later analysis under the microscope.
Only one of the paper’s authors, Oscar Noya, visited the village of the Yanomami during sampling in 2009.
The researchers analyzed the microbial DNA from these samples and found a significantly higher bacterial diversity, not only in comparison with a group of people of American origin but with samples from two groups not from the West but with limited exposure to Western practices.
Analysis
Some of the bacteria present in higher levels in the Yanomami shown to have beneficial health effects, such as helping prevent the formation of kidney stones. Despite not having had no documented exposure to commercial antibiotics, samples of feces containing E. coli Yanomami functional genes resistant to antibiotics, including those that offer resistance to synthetic drugs.
Dominguez -Bello and his colleagues suggest that these genes may have originated from an exchange between human microbiota and bacteria on earth, where genes are resistant to antibiotics.
How do you rate this news
avg
– points
No comments:
Post a Comment