Ultrastructure of Cryptosporidium wrairi from the guinea pig.

摘要: SYNOPSIS. The ultrastructure of the known tissue stages Cryptosporidium wrairi Vetterling, Jervis, Merrill, and Sprinz, 1971 parasitizing ileum guinea pigs is described. Young trophozoites are surrounded by 4 unit membranes, outer 2 host origin, inner pellicle parasite. Each trophozoite contains a vesicular nucleus with large nucleolus. Its cytoplasm ribosomes, but eventually fills cisternae rough endoplasmic reticulum. As matures area attachment parasite to cell becomes vacuolated, vertical membranous folds. It apparent that acquires nourishment from thru this attachment. schizonts develop, (a) multiple nuclei appear, (b) reticulum enlarges, (c) zone increases in area, (d) vacuoles, which develop as endocytotic vesicles found (e) membrane resorbed around sides developing schizont. Following nuclear division, merozoites schizont budding. Merozoites have an similar described for other coccidia except no mitochondria, micropores, or subpellicular tubules were observed. penetrate epithelial causing invagination microvillar lysing it. No formed between cell. However, produces one dense bands adjacent area. macrogamete nucleus, reticulum, zone, vacuoles. also variety granules, some polysaccharide. immature microgametocyte compact nuclei. mature microgametocytes zygotes found.