Gastric ulcers in pigs affected with postweaning multisystemic wasting syndrome

Pesquisa Veterinária Brasileira

Corrêa, André Mendes Ribeiro²  Zlotowsk, Priscila¹  Cruz, Cláudio Estêvão Farias da²  Driemeier, David²  Barcellos, David Emilio Santos Neves de¹ 

[1] UFRGS, Porto Alegre, Brazil;, Universidade Federal do Rio Grande do Sul

关键词: Diseases of swine;    gastric ulcer;    PMWS;    PCV2;    Helicobacter pylori.;   

DOI  :  10.1590/S0100-736X2008001200007

来源: Colegio Brasileiro de Patologia Animal-CBPA

【 摘 要 】

Samples of gastric lymph nodes and the stomachs from 24 pigs selected from herds affected by postweaning multisystemic wasting syndrome (PMWS) and sudden death associated with gastric ulcers were studied. Pigs were selected on the basis of unthriftiness, decreased feed intake, and wasting. The stomachs were opened, inverted, and classified into 0-3 score according the severity of the gross lesions present in pars oesophagica (non-glandulargastric mucosa). Selected samples were processed for paraffin embedding and stained with hematoxylin and eosin. Immunohistochemistry using anti-PCV2 (porcine circovírus type 2) antibody, anti-Helicobacter pylori antibody and a wide-spectrum anti-cytokeratin antibody was performed. Gross changes in pars oesophagea were classified according to the severity of lesions as score 3, 2, and 1 in 8, 6, 5 stomachs respectivelly. Microscopically, hyperplastic lymphoid follicles, lymphohistiocytic inflammatory infiltrates and focci of necrosis in the gastric mucosa were common findings. Large amounts of PCV2 antigen were observed in the cytoplasm and nuclei from intralesional cells and debris from the gastric glandular mucosal zone; however, in the fundus, anti-PCV2 immunostaining was restricted to the surface mucosal cells and foveolar compartment. All gastric lymph nodes were positive for PCV2 antigen. Anti-H. pylori immunostaining was seen in eleven cases, mainly in the antrum, on the mucosal surface and foveolar compartment. The association of the anti-PCV2 immunostaining with the glandular mucus-producing cells suggests a role for PCV2 as an additional factor for the swine ulcer development. Index

【 授权许可】

CC BY-NC