Red Squirrels Harbor Leprosy-Causing Bacteria

Researchers were intrigued by an increasing number of sores on red squirrels in the United Kingdom and Ireland, so they decided to run tests on the animals to find out what was causing these mysterious marks. After investigating, they now say they have found the cause: Some squirrels harbor the same bacteria that caused leprosy in humans in medieval Britain. In the study, the researchers conducted genetic screening and blood tests on more than 100 red-squirrel cadavers from England, Ireland and Scotland.