Which entity is NOT related to schistosomiasis?

The selection of malaria as the entity not related to schistosomiasis is correct because schistosomiasis is a specific parasitic disease caused by worms belonging to the Schistosoma genus, which includes species such as Schistosoma japonicum, Schistosoma mansoni, and Schistosoma haematobium. All these species are responsible for causing different forms of schistosomiasis, which manifests with symptoms linked to the migration of these freshwater-dwelling trematodes within the human body.

In contrast, malaria is caused by protozoan parasites of the genus Plasmodium, primarily transmitted through the bite of infected Anopheles mosquitoes. While both schistosomiasis and malaria are prevalent in tropical regions and can coexist in certain populations, they are distinctly different diseases caused by different types of organisms (helminths for schistosomiasis and protozoa for malaria), making malaria unrelated to schistosomiasis.