New Jersey investigates first possible ‘local’ malaria case in decades Erin Vogt Published: August 18, 2025 Patient with malaria possibly infected in NJ by mosquito (EyeEm Mobile GmbH Getty Stock, Canva, Townsquare Media Illustration)

A New Jersey patient with malaria has state officials investigating whether the resident was infected by a local mosquito.

The Morris County resident has no history of international travel.

The state Departments of Health and Environmental Protection and Department of Health have been working with the U.S. Centers for Disease Control and Prevention to investigate potential sources of infection.

If confirmed, this would be the first known locally acquired case of malaria in New Jersey in 34 years, since 1991.

Anopheles mosquitoes, which transmit ma

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