Centuries before first contact with Europeans, new research suggests a strain of tuberculosis was already circulating from the South American coasts to the mountains.
, but recent evidence indicates this wasn't the first time TB arrived in South America.– the strain that causes tuberculosis in humans – in South American skeletons from about a thousand years ago, which is well before the arrival of Spanish, French and Portuguese colonizers.
strains emerged less than 6,000 years ago, pointing the finger at sea mammals as the potential first voyagers who carried TB across the ocean.
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