1. Department of Veterinary Clinical Pathology, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
2. Veterinary Clinical Hospital, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
3. Department of Small Ruminants Medicine, Federal University of Rio Grande do Sul, RS, Brazil
4. Department of Veterinary Pathology, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil