Ultrastructural study of the endogenous stages of Isospora canis (Nemeséri, 1959) in the small intestine of dogs
Hilali, M.; Ghaffar, F.A.; Scholtyseck, E.
Acta Veterinaria Academiae Scientiarum Hungaricae 27(3): 233-243
1979
ISSN/ISBN: 0001-7205 PMID: 517356 Document Number: 152892
Coccidia-free, conventionally reared, 8-week-old puppies were inoculated with sporulated I. canis oocysts. The dogs were killed 5, 12 or 19 days after infection, and their small intestine was examined for the endogenous stages. These occurred mostly in the whole middle third of the small intestine immediately beneath the intestinal epithelium. The merozoites multiplied by endodyogeny. They showed the general fine structural characteristics of Sporozoa. About 14 rhoptries were observed in the merozoites. Rhoptry-like bodies (up to 22 in number) and micronemes were also observed in the posterior third of the merozoites. The macrogametes and microgamonts generally resembled those of other coccidia.