Affiliation:
1. Universidade Federal do Rio Grande do Sul, Brazil
Abstract
ABSTRACT: Swine erysipelas is a disease of worldwide distribution, responsible for causing economic losses in swine and considered an occupational zoonotic disease. It is estimated that 30% to 50% of pigs are carriers and stress can predispose the appearance of clinical disease. The diagnosis of erysipelas in slaughter pigs becomes a challenge for pathologists, since scalding and dehairing, routine procedures in slaughterhouses, generate histological artifacts that often make the final diagnosis impossible. This study describes the anatomopathological aspects and evaluate the use of immunohistochemistry as a diagnostic tool in these cases. Forty-three cases of erysipelas in slaughter pigs were analyzed. Grossly, the cutaneous lesions were characteristic pink, red, or purple raised rhomboid, rectangular or square lesions (“diamond skin”). Histologically, in the dermis and subcutaneous tissue, there were suppurative vasculitis, hidradenitis and folliculitis, as well as degeneration and necrosis of the vessel wall, thrombosis and multifocal areas of necrosis. Suppurative vasculitis and damage to the blood vessel wall were observed in all cases, with varying degrees of severity. The immunohistochemical technique proved to be an effective complementary method of diagnosis, with positive immunostaining in 93%. In most cases, we observed mild immunostaining (57.5%), moderate in 22.5% and marked in 20%.
Reference29 articles.
1. Erysipelothrix larvae sp. nov., isolated from the larval gut of the rhinoceros beetle, Trypoxylus dichotomus (Coleoptera: Scarabaeidae);Bang B.-H.;Antonie Van Leeuwenhoek,2015
2. Erysipelothrix spp. genotypes, serotypes, and surface protective antigen types associated with abattoir condemnations;Bender J.S.;J. Vet. Diagn. Invest.,2011
3. Comparison of conventional direct and enrichment culture methods for Erysipelothrix spp. from experimentally and naturally infected swine;Bender J.S.;J. Vet. Diagn. Invest.,2009
4. Decreto 10.468, de 18 de agosto de 2020 (Altera o Decreto 9.013, de 29 de março de 2017, artigo 199). Regulamento da Inspeção Industrial e Sanitária de Produtos de Origem Animal (RIISPOA);Ministério da Agricultura, Pecuária e Abastecimento (MAPA),2020
5. Erysipelothrix rhusiopathiae: bacteriology, epidemiology and clinical manifestations of an occupational pathogen;Brooke C.J.;J. Med. Microbiol.,1999