Washington, Sept 2 (ANI): Scientists have discovered green fluorescence in Nubian skeletons indicating a tetracycline-labelled bone, a finding that shows that antibiotics were already in use nearly 2,000 years ago.

A chemical analysis of the bones of ancient Nubians showed they were regularly consuming tetracycline, most likely in their beer.

"It's becoming increasingly clear that this prehistoric population was using empirical evidence to develop therapeutic agents. I have no doubt that they knew what they were doing," said Emory anthropologist George Armelagos.

In 1980, he discovered what appeared to be traces of tetracycline in human bones from Nubia dated between A.D. 350 and 550.

Armelagos and his fellow researchers later tied the source of the antibiotic to the Nubian beer.

The grain used to make the fermented gruel contained the soil bacteria streptomyces, which produces tetracycline.

Mark Nelson of Paratek Pharmaceuticals, Inc found that the bones of these ancient people were saturated with tetracycline, showing that they had been taking it for a long time.

The ancient Egyptians and Jordanians used beer to treat gum disease and other ailments, Armelagos said, adding that the complex art of fermenting antibiotics was probably widespread in ancient times, and handed down through generations.

"Now we're going to compare the amount of tetracycline in the bones, and bone formation over time, to determine the dosage that the ancient Nubians were getting," he concluded.

The research is published in the American Journal of Physical Anthropology. (ANI)