Attached is the Question Sheet for Diagnostic Exercise #228, contributed by Caroline S. Silveira¹, Melissa Macías-Rioseco², and Francisco A. Uzal³, (fauzal@ucdavis.edu). ¹Animal Health Research Platform, National Institute for Agriculture Research (INIA), La Estanzuela Experimental Station, Colonia, Uruguay. ²California Animal Health and Food Safety Laboratory System, Tulare Branch, University of California-Davis, Tulare, CA, USA ³California Animal Health and Food Safety Laboratory System, San Bernardino Branch, University of California-Davis, San Bernardino, CA, USA mmaciasrioseco@ucdavis.edu