Pathology and pathogenicity of Eimeria scabra (Henry, 1931) in experimentally infected pigs.
Pathology and pathogenicity of the coccidium Eimeria scabra were studied in pigs experimentally infected at 1-2 months of age. Two phases were evident in the course of pathogenic process. In the first phase, 7-8 days after inoculation (DAI), caudal jejunum and ileum were affected by a severe catarrhal inflammation characterized by intensive infiltrate containing numerous neutrophils and eosinophils, vigorous activation of Peyer's patches, villous fusion and general atrophy of epithelium. In the second phase, 9 DAI, release of immature oocysts was associated with break-down of the epithelial barrier and development of pseudomembranes. Reparative and regenerative processes followed immediately, and 13 DAI, the structure of caudal jejunum and ileum was completely reestablished.
Institute of Parasitology, Laboratory of Electron Microscopy, Czechoslovak Academy of Sciences, Ceské Budĕjovice.
J
J
Vítovec
B
B
Koudela
J
J
Stĕrba
D000818:Animals; D003048:Coccidiosis / Q000469:parasitology / Q000473:pathology / Q000662:veterinary*; D004539:Eimeria / Q000472:pathogenicity*; D004848:Epithelium / Q000473:pathology / Q000648:ultrastructure; D007082:Ileum / Q000473:pathology* / Q000648:ultrastructure; D007413:Intestinal Mucosa / Q000473:pathology / Q000648:ultrastructure; D007583:Jejunum / Q000473:pathology* / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D013552:Swine; D013553:Swine Diseases / Q000469:parasitology / Q000473:pathology*