If confirmed, it would be the first case of locally acquired malaria in New Jersey since 1991. There are about 100 travel-related cases in the state each year, health officials said.

Health officials in New Jersey are investigating a case of malaria, the potentially deadly mosquito-transmitted disease, in a Morris County resident with no international travel history. That means it is possible the infection happened locally,

A Morris County resident contracted the illness without leaving the United States. Investigators are searching to determine the source of the infection.