Ultrastructural observations on the sexual stages and oocyst formation inEimeria laureleus (Protozoa, Coccidia) of perch,Perca flavescens, from Lake Sasajewun, Ontario

Desser, Sherwin S.; Li, Lianxiang

doi:10.1007/bf00942217

Cited by 30 publications

(40 citation statements)

References 11 publications

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“…(Pellerdy & Molnar 1971, Molnar & Fernando 1974, Desser & Li 1984, Jastrzebski 1984, Shulman 1984. The literature contains only a single reference to coccidian infection of the pikeperch: Shulman (1984) gave the pikeperch as host to the species Goussia schulmani (Kulemina, 1969).…”

Section: Discussionmentioning

confidence: 99%

Nodular coccidiosis of the pikeperch Stizostedion lucioperca and Volga perch Stizostedion volgensis

Molnár¹

1996

Dis. Aquat. Org.

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In early spring, coccidiosis often develops in the gut of pikeperch Stizostedion lucioperca and Volga perch S. volgensis living in Lake Balaton. Hungary. Gamonts and oocysts cause nodular infection of enterocytes in specific portions of the gut. Besides those present in the nodules, merozoites and gamonts occur diffusely in the epithelium of the intestine and the pyloric sacs. The different developmental stages are located in the apical cytoplasm of enterocytes and are released from the cells in unsporulated condition. The sporulation of oocysts takes 48 h in tap-water at 20°C. The oocysts, which are 13-13.5 pm in diameter in an unsporulated state, grow to 17-20 pm by the end of the sporulation process, and ellipsoidal sporocysts composed of 2 valves and containing banana-shaped sporozoites develop In them. On the basis of oocysts derived from p~keperch, the parasite is described as Goussia dessen n. sp.

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Section: Discussionmentioning

confidence: 99%

Nodular coccidiosis of the pikeperch Stizostedion lucioperca and Volga perch Stizostedion volgensis

Molnár¹

1996

Dis. Aquat. Org.

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“…The identification of wall-forming bodies in Calyptospora funduli (Hawkins et al 1983b) should be reexamined. In Goussia iroquoina (Paterson & Desser 1981b), Eimeria laureleus, G. aculeati, G. carpel11 and G. pannonica macrogamonts contain electron-dense bodies which are involved in neither oocyst nor sporocyst wallformation (Desser & Li 1984, Paterson & Desser 1984, Jastrzebski 1989, Lom et al 1991, Lukes 1992. The same applies to the large globular osmiophilic granules seen in G. spraguei (Morrison & Poynton 1989) and the peripherically arranged dense inclusions of G. subepithelialis (Steinhagen et al 1990).…”

Section: Wall-forming Bodiesmentioning

confidence: 97%

Ultrastructural and developmental affinities of piscine coccidia

Paperna¹

1995

Dis. Aquat. Org.

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Piscine coccidia differ from terrestrial-host coccidia in having a soft, membranous oocyst wall. In contrast, however, to the structural and developmental conformity observed among the highly evolved and specialized monoxenous eimeriid coccidia of avian and mammalian hosts, piscine coccidia demonstrate extreme diversity in developmental sites, sporocyst morphology, macrogamont organization and oocyst wall formation. Sporozoites and some merozoites of several piscine coccidia contain refractile bodies, while those of others contain crystalline ones. Some are obligatorily heteroxenous, while in others transmission is mediated by paratenic hosts. Structural and developmental variability among piscine coccidia could imply a polyphyletic origin, but it could also be an evidence for a lower degree of evolutionary specialization. Many of the structural and developmental features found in piscine coccidia occur in other lower vertebrate and invertebrate-host coccidia, as well as in the heteroxenous cyst-formlng coccidia of higher vertebrates.

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“…Their limited occurrence and their localization within plexuses of endoplasmic reticulum, are suggestive of their being active meta bolic organelles rather than nutrient storing inclusions. Organelles reminiscent of the wall-forming bodies of terrestrial host coccidia (Scholtyseck, Mehlhorn and Hammond, 1971 ;Chobotar and Scholtyseck, 1982) have been described in piscine macrogamonts (Paterson and Desser, 1981 ;Hawkins, Solangi and Overstreet, 1983 ;Desser and Li, 1984 ;Morrison and Hawkins, 1984 ;present study). In terrestrial coccidia, wallforming bodies participate in the formation of the solid, dessication resistant, oocyst wall (Scholtyseck et al, 1971 ;Scholtyseck, 1979).…”

Section: Discussionmentioning

confidence: 52%

Ultrastructure of the macrogamont ofGoussia cichlidarumLandsberg and Paperna, 1985, a Coccidian parasite in the swimbladder of Cichlid fish

Paperna

Landsberg²,

Feinstein

1986

Ann. Parasitol. Hum. Comp.

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Ultrastructural observations on the sexual stages and oocyst formation inEimeria laureleus (Protozoa, Coccidia) of perch,Perca flavescens, from Lake Sasajewun, Ontario

Cited by 30 publications

References 11 publications

Nodular coccidiosis of the pikeperch Stizostedion lucioperca and Volga perch Stizostedion volgensis

Nodular coccidiosis of the pikeperch Stizostedion lucioperca and Volga perch Stizostedion volgensis

Ultrastructural and developmental affinities of piscine coccidia

Ultrastructure of the macrogamont ofGoussia cichlidarumLandsberg and Paperna, 1985, a Coccidian parasite in the swimbladder of Cichlid fish

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