Dear All, Attached is the Question Sheet for Diagnostic Exercise* # 251*, contributed by Ariadni Kotzias Bandeira1, Silvio C. Fonseca1, and Fábio S. Mendonça1 1Laboratory of Animal Diagnosis, Federal Rural University of Pernambuco, Recife, PE, Brazil. Corresponding author: fabio.mendonca@ufrpe.br This is our last postage of the year. I hope you have a Merry Christmas and a Prosperous New Year! Lots of love, happiness, sanity, and a strong drink. Claudio