- Autochthonous malaria:
--- Indigenous. Mosquitoborne transmission of malaria in a geographic area where malaria occurs regularly.
--- Introduced. Mosquitoborne transmission of malaria from an imported case in an area where malaria does not occur regularly. - Imported malaria: Malaria acquired outside a specific area. In reports, imported cases are those acquired outside the United States and its territories (Puerto Rico, Guam, and the U.S. Virgin Islands).
- Induced malaria: Malaria acquired through artificial means (e.g., blood transfusion or by using shared common syringes).
- Relapsing malaria: Renewed manifestations (i.e., clinical symptoms or parasitemia) of malarial infection that is separated from previous manifestations of the same infection by an interval greater than the usual periodicity of the paroxysms.
- Cryptic malaria: An isolated malaria case that cannot be linked epidemiologically to secondary cases.
Terms from the World Health Organization and Malaria Branch CDC