Grandma knew it all along: Certain places on the body are 'hot spots' for unhealthy microbes. That notion - which the authors of a new study dubbed 'the grandma hypothesis,' after grandma's admonitions to clean behind the ears - was tested by students in a genomics course at...
That notion — which the authors of a new study dubbed “the grandma hypothesis,” after grandma’s admonitions to clean behind the ears — was tested by students in a genomics course at George Washington University in Washington, D.C.
The collection of microbes living on and in the body is known the microbiome. It has a role in human health. The skin's microbiome varies across dry, moist and oily areas.Keith Crandall, director of the Computational Biology Institute at GW, recalled his own grandmother always telling the kids in his family to “scrub behind the ears, between the toes and in the belly button.”
Together with Marcos Pérez-Losada, an associate professor of biostatistics and bioinformatics, he designed this genomics course. The students then learned how to extract and sequence the DNA in the skin samples, finding that areas cleaned more frequently had a greater diversity and thus potentially a healthier collection of microbes compared to the samples taken from the so-called hot spots.
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