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Ancient DNA Reveals Americas' Longstanding Leprosy Strains

5/31/2025

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Summary

Story summary

New research uncovers that Mycobacterium lepromatosis thrived in the Americas over a millennium ago, challenging the notion of European introduction. Ancient DNA from Canada and Argentina reveals unique local strains. This pivotal study underscores the urgency for enhanced surveillance as leprosy resurfaces worldwide, igniting significant public health alarms.

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Story summary

New research uncovers that Mycobacterium lepromatosis thrived in the Americas over a millennium ago, challenging the notion of European introduction. Ancient DNA from Canada and Argentina reveals unique local strains. This pivotal study underscores the urgency for enhanced surveillance as leprosy resurfaces worldwide, igniting significant public health alarms.