A New Jersey resident has developed a case of malaria without having traveled internationally, potentially making it the first locally transmitted case in decades, state health officials say.

The resident, whose name has not been released, lives in Morris County, officials said. New Jersey's health and environmental protection departments are working with the U.S. Centers for Disease Control and Prevention to identify the source of the infection. Officials said it is possible the illness was contracted in New Jersey. MORE: Jersey Shore towns issue swimming bans as Hurricane Erin creates strong currents

Anopheles mosquitos, the species that spreads malaria, are present in New Jersey, but locally transmitted cases of malaria are extremely rare. The last known case occurred in 1991. H

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