Parasitic Ectoparasitic Infectious Disease, also known as ectoparasitic infestations, is related to lice infestation and myiasis. An important gene associated with Parasitic Ectoparasitic Infectious Disease is CBS (Cystathionine Beta-Synthase), and among its related pathways/superpathways are T-cell activation SARS-CoV-2 and IL12-mediated signaling events. Affiliated tissues include spleen and skin.