Although any organism that "lives in or on another and takes its nourishment from that other organism" is technically a parasite, in common medical parlance<unk> " refer to infections due to protozoa, helminths, arthropods, or other "macroparasites"
Parasitic diseases
Sexually transmitted diseases
Tick borne illnesses
Neglected tropical diseases
Mosquito-borne infections
Skin and soft tissue infections
Helminth infections
Dental problems