RT Book, Section A1 Burd, Eileen M. A1 Westblade, Lars F. A1 Hofman, Paul A2 Barnhill, Raymond L. A2 Crowson, A. Neil A2 Magro, Cynthia M. A2 Piepkorn, Michael W. A2 Kutzner, Heinz A2 Desman, Garrett T. SR Print(0) ID 1178394750 T1 Protozoal and Algal Infections T2 Barnhill's Dermatopathology, 4e YR 2020 FD 2020 PB McGraw Hill Education PP New York, NY SN 9780071828222 LK dermatology.mhmedical.com/content.aspx?aid=1178394750 RD 2023/06/10 AB Protozoa are unicellular parasites that infect millions of people each year. Infections are often latent but may progress to active disease when the host-parasite balance shifts in favor of the parasite. Parasite burden (at initial infection or later), host immunity, and other factors influence this balance. International travel, extension of vector habitats, and increased numbers of immunocompromised hosts (patients undergoing chemotherapy, organ transplant recipients, HIV-infected individuals) have increased the pool of susceptible hosts.