Histological study of coccidiosis caused in the silver carp and the bighead by Eimeria sinensis Chen, 1956
Molnár, K.
Acta Veterinaria Academiae Scientiarum Hungaricae 26(3): 303-312
1976
ISSN/ISBN: 0001-7205 PMID: 1032457 Document Number: 102809
Coccidiosis due to E. sinensis occur frequently in silver carp and bighead populations cultured in the pond farms of Hungary. The schizogonic development of E. sinensis takes place in the intestinal epithelium, but gametogonic and schizogonic stages frequently occur also in the propria and submucosa. All developmental stages of E. sinensis can occur in any segment of the gut, but intensive infection is chiefly found in the fore- and midgut. The oocysts are passed in a sporulated state. The main gross lesions found in E. sinensis coccidiosis are swelling of the mucosa, and coating of the intestinal epithelium by a viscous mucus, in which many yellow bodies enclosing oocysts are encountered. Hemorrhagic and inflammatory lesions do not occur, even with very massive infections.