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The animals are also vulnerable to a range of deadly diseases such as upper respiratory illnesses and the shell disease cutaneous dyskeratosis, which softens their shells.

For the first time, scientists have begun to figure out why the disfiguring skin lesions caused by cutaneous leishmaniasis don't hurt.

With the CDC study revealing DNA evidence of a locally acquired strain of cutaneous leishmaniasis, there are concerns domestic sand flies could acquire a deadly form of the disease via dog imports.

A hint of what was going on came from a 2018 study that showed an increase in cases of cutaneous leishmaniasis in the U.S.

Shortly after reaching his native land that September, the boy also died, of “a cutaneous disorder.”