Where and how does one acquire cutaneous parasitic diseases?

Parasitic skin diseases may arise from systemic spread or direct penetration of the skin. Cutaneous parasitic infestations are a major source of morbidity, affecting millions worldwide. Tropical climates, crowding, poor nutrition, sanitation problems, and limited medical resources are all associated with increased variety and severity of parasitoses. Ecologically temperate climates and industrialized societies are also afflicted by significant parasitic infestations because of local vectors, distant vacations, and widespread travel to and from areas of endemic infection for business, political, humanitarian, or military purposes. Immunosuppression due to drugs or disease leads to cutaneous manifestations of parasitic diseases that may be caused by unusual organisms.