Immunodeficient Rat ModelsAthymic NudeNIH NudeNIH NudeOutbred RatsRestricted FloraTac:N:NIH-WhnOrder Model ... #'s:NIHRNU-M (homozygous nude)NIHRNU-T (heterozygous)Features: The NIH Nude rat strain exhibits ... deficiccasionally on the rest of the body. At later ages, some grow hair, but they become hairless again