Irish potato famine pathogen identified (BBC)

By Helen Briggs

Scientists have used plant samples collected in the mid-19th Century to identify the pathogen that caused the Irish potato famine.

A plant pest that causes potato blight spread to Ireland in 1845 triggering a famine that killed one million people.

DNA extracted from museum specimens shows the strain that changed history is different from modern day epidemics, and is probably now extinct.

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