RT Book, Section A1 Elston, Dirk M. A1 Ali, Asra A1 Bogle, Melissa A. A1 Hatter, Alyn D. A2 Ali, Asra SR Print(0) ID 1176115498 T1 Cutaneous Infestations T2 McGraw-Hill Education Specialty Board Review Dermatology: A Pictorial Review, 3e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 9780071793230 LK dermatology.mhmedical.com/content.aspx?aid=1176115498 RD 2024/10/06 AB An organism that lives on or within another organism (host)A parasite causes harm to the host. This distinguishes parasitism from commensalism, in which the host derives no benefit but is not injured, and mutualism, where the relationship benefits both organismsHost, in addition to providing a steady food source, provides warmth and shelterDefinitive host are those in which parasite becomes sexually mature and undergoes reproductionReservoir hosts are those in which parasites that are pathogenic to other animals or to humans resideVector are agent by which a parasite is transmitted to the host (e.g., arthropod, mollusk)