This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/TBED.13668 This article is protected by copyright. All rights reserved DR. RUY DIEGO CHACON VILLANUEVA (Orcid ID : 0000-0002-1044-7450) PROF. ANTONIO J PIANTINO FERREIRA (Orcid ID : 0000-0002-0086-5181) Article type : Original Article Running head: Fowl poxvirus and REV in laying hens An atypical clinicopathological manifestation of fowl poxvirus associated with reticuloendotheliosis virus in commercial laying hen flocks in Brazil. Ruy D. Chacón A,B , Claudete S. Astolfi-Ferreira A , David I. De la Torre A , Lilian R. M. de Sá A , Antonio J. Piantino Ferreira A,C . A Department of Pathology, School of Veterinary Medicine, University of São Paulo, B Inter-units Program in Biotechnology, University of São Paulo, Av. Prof. Dr. Orlando M. Paiva, 87, São Paulo 05508-270 SP, Brazil. Accepted Article