The Maryland Department of Health confirmed its first locally acquired malaria case in more than 40 years.
The patient was hospitalized and is recovering, the health department said Aug. 18.
"We have not seen a case in Maryland that was not related to travel in over 40 years," Maryland Health Secretary Laura Herrera Scott, MD, said in a statement.
Maryland averages about 200 travel-related malaria cases each year, and the U.S. records about 2,000 annually, according to the department.
The Maryland case is about two months after officials confirmed eight locally acquired malaria cases in the U.S., which broke a 20-year streak of zero locally acquired malaria cases.