Fine structure of Eimeria (s. I.) vanasi merogony stages in the intestinal mucosa of cichlid fishes

Paperna, I.

doi:10.3354/dao010195

Cited by 17 publications

(23 citation statements)

References 7 publications

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“…8) (with merogonal stages and gamonts) occur concurrently with intracytoplasmic and epicytoplasmic stages. The conspecificity of these forms has not been definitely concluded (Paperna 1991). Endogenous sporulation iviusi cuccidid iedve i.i~ii in a sporii:ateb stage.…”

Section: Epicytoplasmic Infectionmentioning

confidence: 99%

“…11;Paperna & Landsberg 1987) has not yet been found in other piscine coccidia. Also unique to E. vanasi is a multilayered PV (Fig 12) which displaces the tubular system funnels during certain developmental phases (Paperna & Landsberg 1987, Paperna 1991. Invaginations of various sizes and numbers, usually containing an electron-dense core or deposit, occur at the adjoining host cell cytoplasm/PV zone of epicytoplasmic species (Epieirneria spp., G. zarnowskii) or epicytoplasmic stages (in E. vanas]) (Fig.…”

Section: Structure and Differentiationmentioning

confidence: 99%

“…Moreover, ultrastructural studies reveal an active transition from intracellular to epicytoplasmic positions in the host cell ( Fig. 7) (Paperna 1990, 1991, h m & Paperna 1992. Intranuclear infections Several species of piscine coccidia (with both Eimena S. 1. and Goussia-type sporocysts) undergo their entire endogenous development in the nucleus of the host cell (Daoudi et al 1987, Davis & Ball 1993.…”

Section: Epicytoplasmic Infectionmentioning

confidence: 99%

“…Epicytoplasmic infections are established either through penetration beneath and then lifting of the brush border of the host cell (Paperna 1991, Kim & Paperna 1992, or, alternatively, while becoming enclosed on the host cell surface by microvilli-derived extensions (Lukes 1992). The parasitophorous vacuole (PV) containing the growing parasites is covered by the host cell apical wall as it expands above the epithelium (Fig.…”

Section: Epicytoplasmic Infectionmentioning

confidence: 99%

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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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Section: Epicytoplasmic Infectionmentioning

confidence: 99%

Section: Structure and Differentiationmentioning

confidence: 99%

Section: Epicytoplasmic Infectionmentioning

confidence: 99%

Section: Epicytoplasmic Infectionmentioning

confidence: 99%

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Ultrastructural and developmental affinities of piscine coccidia

Paperna¹

1995

Dis. Aquat. Org.

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“…Nonetheless, w e lack substantiative data from the other extra-intestinal coccidia investigated to date (Solangi & Overstreet 1980, Morrison & Poynton 1989. kndodyogeny in Eimeria vanasi merozoites has been previously observed before the onset of differentiation into meronts and following merogonous divisions (Paperna 1991, I m & Paperna 1992.…”

Section: Discussionmentioning

confidence: 99%

Development and line structure of intracytoplasmic and epicytoplasmic meronts, merozoites and young macrogamonts of the cichlid fish swim bladder coccidium Goussia cichlidarum

Kim¹,

Paperna²

1993

Dis. Aquat. Org.

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Light microscopic description of Eimeria sparis sp. nov. and Goussia sparis sp. nov. (Protozoa: Apicomplexa) from Sparus aurata L. (Pisces: Teleostei)

Sitjà‐Bobadilla

Palenzuela

Álvarez-Pellitero

1996

Parasitology Research

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Two new species of Coccidia, Eimeria sparis sp. nov. and Goussia sparis sp. nov., were found in the intestine of Sparus aurata from different culture systems of Spain. These are the first coccidian species described from this host. E. sparis is distinguished from other Eimeria spp. from Perciformes in the size and shape of the sporocysts, which measure 6-9.7 (mean = 7.78, SD = 1.33) x4-6.5 (5.3 +/- 0.92) microns, and in the Stieda-like body. Mature oocysts, spherical or subspherical, measure 9.4-14.3 (11.88 +/- 1.85) microns. G. sparis differs from other Goussia spp. from fish of the Mediterranean area in the size and shape of the oocysts and sporocysts as well as in the location. Mature oocysts measure 16-21 (17.4 +/- 1.5) x 13-18 (14.4 +/- 1.7) microns and sporocysts, 8.6-10.3 (9.5 +/- 0.5) x 5.7-7.4 (mean 6.5 +/- 0.5) microns. The different stages of merogony, gamogony, and sporogony of both species were examined at the light-microscope level in fresh material and histology specimens. Sporulation was endogenous in E. sparis and exogenous in G. sparis.

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Fine structure of Eimeria (s. I.) vanasi merogony stages in the intestinal mucosa of cichlid fishes

Cited by 17 publications

References 7 publications

Ultrastructural and developmental affinities of piscine coccidia

Ultrastructural and developmental affinities of piscine coccidia

Development and line structure of intracytoplasmic and epicytoplasmic meronts, merozoites and young macrogamonts of the cichlid fish swim bladder coccidium Goussia cichlidarum

Light microscopic description of Eimeria sparis sp. nov. and Goussia sparis sp. nov. (Protozoa: Apicomplexa) from Sparus aurata L. (Pisces: Teleostei)

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