Arthropod-borne diseases occur in the majority of the islands.
Malaria is endemic in Papua New Guinea, Solomon Islands and Vanuatu.
Filariasis is widespread but its prevalence varies. Mite-borne typhus has been reported from Papua New Guinea. Dengue fever, including its haemorrhagic form, can occur in epidemics in most islands. Foodborne and waterborne diseases , such as the diarrhoeal diseases, typhoid fever and helminthic infections, are commonly reported. Biointoxication may occur from raw or cooked fish and shellfish.