PRNP and Creutzfeldt Jacob disease: Recently, in an article published by Dementia & Neuropsychology, Martins et al.(2007)1 screened mutationsand polymorphisms at the prion gene (PRNP) in 35 cases of Creutzfeldt-Jakob disease(CJD) from 13 Brazilian states, reported to the Health SurveillanceSecretariat/Ministry of Health (SVS/MS), between 2005 and 2007.