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Kálmán Molnár - One of the best experts on this subject based on the ideXlab platform.
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Epicellular coccidiosis in goldfish.
Diseases of aquatic organisms, 2017Co-Authors: Kálmán Molnár, Csaba SzékelyAbstract:ABSTRACT: In a goldfish stock held in a pet fish pond, heavy coccidian infection, caused by an epicellularly developing Goussia species, appeared in April of 3 consecutive years (2014 to 2016). The shape and size of the oocysts resembled those of an inadequately described species, Goussia carassiusaurati (Romero-Rodriguez, 1978). In histological sections, gamogonic and sporogonic stages infested mostly the second fifth of the intestine, where almost all epithelial cells were infected. Both gamonts and young oocysts occurred intracellularly but in an extracytoplasmal position, seemingly outside the cells. Oocysts were shed non-sporulated. Spheroid to ellipsoidal non-sporulated oocysts measured 12.4 × 13.5 µm on average, but after 48 h sporulation in tap water they reached a size of 16 × 13 µm. The 4 elliptical sporocysts located loosely within the sporulated oocysts measured 13 × 5.4 µm. The oocysts and sporocysts were smaller than those of the better-known Goussia species G. aurati (Hoffman, 1965). KEY WORDS: Coccidiosis · Goussia · Goldfish · Epicellular location · Seasonal development
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Parasitic infections of two invasive fish species, the Caucasian dwarf goby and the Amur sleeper, in Hungary.
Acta veterinaria Hungarica, 2015Co-Authors: László Antal, Csaba Székely, Kálmán MolnárAbstract:In recent years and decades, two new fish species, the Caucasian dwarf goby (Knipowitschia caucasica) and the Amur sleeper (Perccottus glenii) have become members of the Hungarian fish fauna. In a 14-month study on the parasite fauna of these species, the authors detected 11 parasite species in the Caucasian dwarf goby and 17 species in the Amur sleeper. All parasites found in dwarf goby belong to species commonly occurring also in native Hungarian fishes, but three species (Goussia obstinata, Gyrodactylus perccotti and Nippotaenia mogurndae) collected from the Amur sleeper are introduced species new for the Hungarian fauna.
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Description of Goussia kuehae n. sp. (Apicomplexa: Eimeriidae) infecting the Asian seabass, Lates calcarifer (Bloch) (Perciformes: Latidae), cultured in Malaysian fish farms
Systematic Parasitology, 2013Co-Authors: Csaba Székely, Muhammad Hafiz Borkhanuddin, Faizah Shaharom, Mohd Shukri Adam Embong, Kálmán MolnárAbstract:Culturing fishes in marine cages is a rapidly developing area of marine aquaculture. The Asian seabass Lates calcarifer (Bloch) is a fast growing good quality fish that is readily cultured in intensive systems in the South Asian region and in Malaysia in particular. Although several papers have been published to date on viral, bacterial, parasitic and fungal organisms causing diseases in the Asian seabass, the occurrence of a coccidian infection in this species has only recently been recorded. We collected sporulated and unsporulated oöcysts of a new species of Goussia Labbé, 1986, from the mucus covering the epithelium of the intestine of L . calcarifer. This paper provides a description of Goussia kuehae n. sp. Sporulated oöcysts of this species are ellipsoidal, 37–40 μm in length and 28–30 μm in width. The ellipsoidal sporocysts are relatively small, 15.2–17 × 5.7–8 μm, and located loosely in the oöcyst. There are residual bodies both in the oöcysts and the sporocysts. Goussia kuehae n. sp. differs from all known species of Goussia in the large size of the oöcysts and in having two types of oöcyst residuum.
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description of Goussia kuehae n sp apicomplexa eimeriidae infecting the asian seabass lates calcarifer bloch perciformes latidae cultured in malaysian fish farms
Systematic Parasitology, 2013Co-Authors: Csaba Székely, Muhammad Hafiz Borkhanuddin, Faizah Shaharom, Mohd Shukri Adam Embong, Kálmán MolnárAbstract:Culturing fishes in marine cages is a rapidly developing area of marine aquaculture. The Asian seabass Lates calcarifer (Bloch) is a fast growing good quality fish that is readily cultured in intensive systems in the South Asian region and in Malaysia in particular. Although several papers have been published to date on viral, bacterial, parasitic and fungal organisms causing diseases in the Asian seabass, the occurrence of a coccidian infection in this species has only recently been recorded. We collected sporulated and unsporulated oocysts of a new species of Goussia Labbe, 1986, from the mucus covering the epithelium of the intestine of L. calcarifer. This paper provides a description of Goussia kuehae n. sp. Sporulated oocysts of this species are ellipsoidal, 37–40 μm in length and 28–30 μm in width. The ellipsoidal sporocysts are relatively small, 15.2–17 × 5.7–8 μm, and located loosely in the oocyst. There are residual bodies both in the oocysts and the sporocysts. Goussia kuehae n. sp. differs from all known species of Goussia in the large size of the oocysts and in having two types of oocyst residuum.
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Halélősködő kokcidiumok előfordulásának, fejlődésének, fajlagosságának és kórtani hatásának vizsgálata = Research on the occurrence, development, specificity and pathogenic effect of fish parasitic coccidians
2009Co-Authors: Kálmán Molnár, Szilvia Marton, Csaba SzékelyAbstract:34 halfajbol 67 kokcidium tipust gyűjtottunk. Ezek kozul 54-et azonositottunk 30 eddig ismert fajjal. A fajok tobbsege Goussia volt, s csupan 6 faj tartozott az Eimeria genushoz. A halelőskodő kokcidiumok 18S rDNS szerkezetuk alapjan a madarak es emlősok ket nagy Apicomplexa csoportja, a belelőskodő Eimeria fajok, illetve a cisztaformalo fajok kozott helyezkednek el a genetikai torzsfan. A halelőskodő eimeriak DNS szerkezetuket tekintve a melegverű allatok eimeriaihoz allnak kozel. Az epicellularis fejlődesű belben- es veseben fejlődő Goussia fajok a cisztakepző apicomplexakhoz allnak a legkozelebb. A nagy oocisztaju fajok kevesbe specifikus előskodők, ezert a kulonboző halfajokbol leirt Goussia fajok egy resze synonymnak tekintendő. Ugyanakkor mind molekularis eredmenyeink, mind keresztfertőzeses kiserleteink azt igazoljak, hogy a kis oocisztaju Goussia fajok szigoruan fajlagos előskodők. Az aranyhalnak es ezustkarasznak azonos, altalunk G. carassiorum n. sp neven leirando faja van. Ezt a fajt a genetikailag kozel allo pontyra es szeles karaszra nem tudtuk atvinni. Hasonlo kepen a ponty G. carpelli fajaval karaszokban kokcidiozis nem volt kivalthato. A togazdasagban gyakori G. carpelli-vel kiserletesen viszonylag intenziv fertőzest tudtunk letrehozni, de annak kortani hatasa nem volt merhető. Kiserletekkel bizonyitottuk, hogy a baromfi-kokcidiozis gyogyitasara hasznalt kokcidiosztatikumok eredmenyesen hasznalhatok a halak kokcidium-fertőzesenek megelőzesere | 67 coccidian types were collected from 34 species of fish. Of them 54 were identified with 30 known coccidian species. Most species belonged to genus Goussia, and only 6 species to Eimeria. By their 18S rDNA structure fish coccidia located in the genetic tree of Apicomplexa between gut dwelling Eimeria spp of warm blooded animals and cyst forming apicomplexans. By their DNA structures fish eimerians showed the closest resemblance to the Eimeria group of mammals and birds; while epicellular coccidia of the gut and the kidney were relatively close to cyst forming coccidia . Goussia species with large oocysts seem to be less specific to host, therefore, species described from different fishes might be synonyms. Both molecular studies and cross-infection experiments proved that Eimeria and Goussia spp with small oocysts were relatively specific. Gold fish and gibel carp have a common Goussia sp. to be described as Goussia carassiorum. This species could not be transmitted to the common carp and the crucian carp. At a similar way G. carpelli, the specific parasite of the carp caused no infection in Carassius spp. While infecting the common carp with G. carpelli, relatively intensive infections were elicited, nevertheless no significant pathologic effect was found. Successful experiments were performed with coccidiostatic drugs. Drugs used to prevent coccidiosis of chickens and rabbits, show a high effect to fish coccidia, as well.
Csaba Székely - One of the best experts on this subject based on the ideXlab platform.
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Epicellular coccidiosis in goldfish.
Diseases of aquatic organisms, 2017Co-Authors: Kálmán Molnár, Csaba SzékelyAbstract:ABSTRACT: In a goldfish stock held in a pet fish pond, heavy coccidian infection, caused by an epicellularly developing Goussia species, appeared in April of 3 consecutive years (2014 to 2016). The shape and size of the oocysts resembled those of an inadequately described species, Goussia carassiusaurati (Romero-Rodriguez, 1978). In histological sections, gamogonic and sporogonic stages infested mostly the second fifth of the intestine, where almost all epithelial cells were infected. Both gamonts and young oocysts occurred intracellularly but in an extracytoplasmal position, seemingly outside the cells. Oocysts were shed non-sporulated. Spheroid to ellipsoidal non-sporulated oocysts measured 12.4 × 13.5 µm on average, but after 48 h sporulation in tap water they reached a size of 16 × 13 µm. The 4 elliptical sporocysts located loosely within the sporulated oocysts measured 13 × 5.4 µm. The oocysts and sporocysts were smaller than those of the better-known Goussia species G. aurati (Hoffman, 1965). KEY WORDS: Coccidiosis · Goussia · Goldfish · Epicellular location · Seasonal development
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Parasitic infections of two invasive fish species, the Caucasian dwarf goby and the Amur sleeper, in Hungary.
Acta veterinaria Hungarica, 2015Co-Authors: László Antal, Csaba Székely, Kálmán MolnárAbstract:In recent years and decades, two new fish species, the Caucasian dwarf goby (Knipowitschia caucasica) and the Amur sleeper (Perccottus glenii) have become members of the Hungarian fish fauna. In a 14-month study on the parasite fauna of these species, the authors detected 11 parasite species in the Caucasian dwarf goby and 17 species in the Amur sleeper. All parasites found in dwarf goby belong to species commonly occurring also in native Hungarian fishes, but three species (Goussia obstinata, Gyrodactylus perccotti and Nippotaenia mogurndae) collected from the Amur sleeper are introduced species new for the Hungarian fauna.
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Description of Goussia kuehae n. sp. (Apicomplexa: Eimeriidae) infecting the Asian seabass, Lates calcarifer (Bloch) (Perciformes: Latidae), cultured in Malaysian fish farms
Systematic Parasitology, 2013Co-Authors: Csaba Székely, Muhammad Hafiz Borkhanuddin, Faizah Shaharom, Mohd Shukri Adam Embong, Kálmán MolnárAbstract:Culturing fishes in marine cages is a rapidly developing area of marine aquaculture. The Asian seabass Lates calcarifer (Bloch) is a fast growing good quality fish that is readily cultured in intensive systems in the South Asian region and in Malaysia in particular. Although several papers have been published to date on viral, bacterial, parasitic and fungal organisms causing diseases in the Asian seabass, the occurrence of a coccidian infection in this species has only recently been recorded. We collected sporulated and unsporulated oöcysts of a new species of Goussia Labbé, 1986, from the mucus covering the epithelium of the intestine of L . calcarifer. This paper provides a description of Goussia kuehae n. sp. Sporulated oöcysts of this species are ellipsoidal, 37–40 μm in length and 28–30 μm in width. The ellipsoidal sporocysts are relatively small, 15.2–17 × 5.7–8 μm, and located loosely in the oöcyst. There are residual bodies both in the oöcysts and the sporocysts. Goussia kuehae n. sp. differs from all known species of Goussia in the large size of the oöcysts and in having two types of oöcyst residuum.
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description of Goussia kuehae n sp apicomplexa eimeriidae infecting the asian seabass lates calcarifer bloch perciformes latidae cultured in malaysian fish farms
Systematic Parasitology, 2013Co-Authors: Csaba Székely, Muhammad Hafiz Borkhanuddin, Faizah Shaharom, Mohd Shukri Adam Embong, Kálmán MolnárAbstract:Culturing fishes in marine cages is a rapidly developing area of marine aquaculture. The Asian seabass Lates calcarifer (Bloch) is a fast growing good quality fish that is readily cultured in intensive systems in the South Asian region and in Malaysia in particular. Although several papers have been published to date on viral, bacterial, parasitic and fungal organisms causing diseases in the Asian seabass, the occurrence of a coccidian infection in this species has only recently been recorded. We collected sporulated and unsporulated oocysts of a new species of Goussia Labbe, 1986, from the mucus covering the epithelium of the intestine of L. calcarifer. This paper provides a description of Goussia kuehae n. sp. Sporulated oocysts of this species are ellipsoidal, 37–40 μm in length and 28–30 μm in width. The ellipsoidal sporocysts are relatively small, 15.2–17 × 5.7–8 μm, and located loosely in the oocyst. There are residual bodies both in the oocysts and the sporocysts. Goussia kuehae n. sp. differs from all known species of Goussia in the large size of the oocysts and in having two types of oocyst residuum.
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Halélősködő kokcidiumok előfordulásának, fejlődésének, fajlagosságának és kórtani hatásának vizsgálata = Research on the occurrence, development, specificity and pathogenic effect of fish parasitic coccidians
2009Co-Authors: Kálmán Molnár, Szilvia Marton, Csaba SzékelyAbstract:34 halfajbol 67 kokcidium tipust gyűjtottunk. Ezek kozul 54-et azonositottunk 30 eddig ismert fajjal. A fajok tobbsege Goussia volt, s csupan 6 faj tartozott az Eimeria genushoz. A halelőskodő kokcidiumok 18S rDNS szerkezetuk alapjan a madarak es emlősok ket nagy Apicomplexa csoportja, a belelőskodő Eimeria fajok, illetve a cisztaformalo fajok kozott helyezkednek el a genetikai torzsfan. A halelőskodő eimeriak DNS szerkezetuket tekintve a melegverű allatok eimeriaihoz allnak kozel. Az epicellularis fejlődesű belben- es veseben fejlődő Goussia fajok a cisztakepző apicomplexakhoz allnak a legkozelebb. A nagy oocisztaju fajok kevesbe specifikus előskodők, ezert a kulonboző halfajokbol leirt Goussia fajok egy resze synonymnak tekintendő. Ugyanakkor mind molekularis eredmenyeink, mind keresztfertőzeses kiserleteink azt igazoljak, hogy a kis oocisztaju Goussia fajok szigoruan fajlagos előskodők. Az aranyhalnak es ezustkarasznak azonos, altalunk G. carassiorum n. sp neven leirando faja van. Ezt a fajt a genetikailag kozel allo pontyra es szeles karaszra nem tudtuk atvinni. Hasonlo kepen a ponty G. carpelli fajaval karaszokban kokcidiozis nem volt kivalthato. A togazdasagban gyakori G. carpelli-vel kiserletesen viszonylag intenziv fertőzest tudtunk letrehozni, de annak kortani hatasa nem volt merhető. Kiserletekkel bizonyitottuk, hogy a baromfi-kokcidiozis gyogyitasara hasznalt kokcidiosztatikumok eredmenyesen hasznalhatok a halak kokcidium-fertőzesenek megelőzesere | 67 coccidian types were collected from 34 species of fish. Of them 54 were identified with 30 known coccidian species. Most species belonged to genus Goussia, and only 6 species to Eimeria. By their 18S rDNA structure fish coccidia located in the genetic tree of Apicomplexa between gut dwelling Eimeria spp of warm blooded animals and cyst forming apicomplexans. By their DNA structures fish eimerians showed the closest resemblance to the Eimeria group of mammals and birds; while epicellular coccidia of the gut and the kidney were relatively close to cyst forming coccidia . Goussia species with large oocysts seem to be less specific to host, therefore, species described from different fishes might be synonyms. Both molecular studies and cross-infection experiments proved that Eimeria and Goussia spp with small oocysts were relatively specific. Gold fish and gibel carp have a common Goussia sp. to be described as Goussia carassiorum. This species could not be transmitted to the common carp and the crucian carp. At a similar way G. carpelli, the specific parasite of the carp caused no infection in Carassius spp. While infecting the common carp with G. carpelli, relatively intensive infections were elicited, nevertheless no significant pathologic effect was found. Successful experiments were performed with coccidiostatic drugs. Drugs used to prevent coccidiosis of chickens and rabbits, show a high effect to fish coccidia, as well.
Milan Jirků - One of the best experts on this subject based on the ideXlab platform.
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Goussia Labbé, 1896 (Apicomplexa, Eimeriorina) in Amphibia: diversity, biology, molecular phylogeny and comments on the status of the genus.
Protist, 2008Co-Authors: Miroslav Oborník, Milan Jirků, Julius Lukeš, David ModrýAbstract:We provide new data on morphology, host specificity, life history, pathology and phylogeny of the coccidian genus Goussia in European anurans. Divergence in the SSU rDNA sequences (3–4%) of three Goussia isolates from three anuran hosts suggests that the isolates represent three distinct species. The isolate from Pelophylax kl. esculentus was determined as Goussia neglecta. The isolates from Rana dalmatina and Rana temporaria are considered conspecific and are, on the basis of host specificity, light microscopical, ultrastructural, and molecular phylogenetic data, described as a new species, Goussia noelleri. The new Goussia species from Bufo bufo remains unnamed. During the host's metamorphosis the infection disappears, however, oocysts are retained in the liver of post-metamorphic frogs. Molecular phylogenetic analysis showed that anuran-host Goussia form a well-supported monophyletic clade, which together with a clade represented by piscine Goussia metchnikovi, constitute basal lineages of the Eimeriidae. The two lineages show polytomy, likely reflecting undersampling of the basal eimeriid taxa. Goussia janae represents a distinct lineage, sister to the clade containing the other eimeriorinid taxa, suggesting a paraphyly of the genus Goussia. The identity of G. neglecta, the status of the genus Goussia, the presence of cryptic species in anuran-host Goussia and their ecological peculiarities are discussed.
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the phylogeny of Goussia and choleoeimeria apicomplexa eimeriorina and the evolution of excystation structures in coccidia
Protist, 2002Co-Authors: Milan Jirků, David Modrý, Jan Slapeta, Břetislav KoudelaAbstract:Summary The phylogenetic relationships of Goussia janae and Choleoeimeria sp. were analyzed using the small subunit ribosomal RNA gene (SSU rDNA). This is a first attempt to study the molecular phylogeny of coccidian genera parasitizing strictly poikilotherm hosts. The biliary Eimeria -like coccidia of reptiles classified into the genus Choleoeimeria form a sister clade to the family Eimeriidae, which confirms the separate generic status of the genus Choleoeimeria . The position of Goussia is less robustly resolved, since it forms a trichotomy with the Eimeriidae and Sarcocystidae, or alternatively constitutes the earliest branch of the coccidian lineage. Morphological similarities, namely the extracytoplasmic location of the endogenous stages, and the presence of sutures in the sporocyst wall are discussed in the context of the traditional classification of eimeriids. In contrast to the morphology-based systematics, the monophyly of Goussia and Choleoeimeria is not supported by the SSU rDNA data.
Pilar Alvarez-pellitero - One of the best experts on this subject based on the ideXlab platform.
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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).
Parasitology research, 1996Co-Authors: Ariadna Sitjà-bobadilla, Oswaldo Palenzuela, Pilar Alvarez-pelliteroAbstract: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) ×4–6.5 (5.3±0.92) μm, and in the Stieda-like body. Mature oocysts, spherical or subspherical, measure 9.4–14.3 (11.88±1.85) μm. 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)×13–18 (14.4±1.7) μm and sporocysts, 8.6–10.3 (9.5±0.5)× 5.7–7.4 (mean 6.5±0.5) μm. 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.
Julius Lukeš - One of the best experts on this subject based on the ideXlab platform.
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Schematic interpretation of host–parasite interactions of epicellular piscine cryptosporidians and coccidians.
2015Co-Authors: Pavla Bartošová-sojková, Rebecca D. Oppenheim, Dominique Soldati-favre, Julius LukešAbstract:Monopodial stage of Cryptosporidium molnari with the detail of feeder organelle (inset) (A; modified from Alvarez-Pellitero P, Palenzuela O, Sitjà-Bobadilla A. 2002. Cryptosporidium molnari n. sp. (Apicomplexa: Cryptosporidiidae) infecting two marine fish species, Sparus aurata L. and Dicentrarchus labrax L. Figs 23 and 30. International Journal for Parasitology 32: 1007–1021. Elsevier 2002), Cryptosporidium villithecus (B; adapted from Landsberg and Paperna, 1986), Goussia janae (C; adapted from Lukeš J, Starý V. 1992. Ultrastructure of life cycle stages of Goussia janae (Apicomplexa, Eimeriidae) and X-ray microanalysis of accompanying precipitates. Canadian Journal of Zoology, 70 (12): 2382–2397, 2008 Canadian Science Publishing or its licensors. Reproduced with permission), Eimeria anguillae (D), Goussia spraguei (E; adapted from A new species of Goussia (Apicomplexa, Coccidia) in the kidney tubules of the cod, Gadus morhua L. Morrison CM, Poynton SL. Journal of Fish Diseases 12 (6). 1989. John Wiley & Sons, Inc. http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2761.1989.tb00564.x/abstract), Eimeria puytoraci (F), Eimeria vanasi with the detail of its protrusions into the host cell cytoplasm (inset) (G; adapted from Paperna, (1991). Kim and Paperna (1992)); Spider-like stage of Goussia pannonica (H; adapted from Life cycle of Goussia pannonica (Molnár, 1989) (Apicomplexa, Eimeriorina), an extracytoplasmic coccidium from the white bream Blicca bjoerkna. Lukeš J. Journal of Protozoology 39 (4). 1992 John Wiley & Sons, Inc. http://onlinelibrary.wiley.com/doi/10.1111/j.1550-7408.1992.tb04836.x/abstract). In all figures, the scale bar is 1 μm, with the exception of insets (0.2 μm in A and 0.3 μm in G).
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Goussia Labbé, 1896 (Apicomplexa, Eimeriorina) in Amphibia: diversity, biology, molecular phylogeny and comments on the status of the genus.
Protist, 2008Co-Authors: Miroslav Oborník, Milan Jirků, Julius Lukeš, David ModrýAbstract:We provide new data on morphology, host specificity, life history, pathology and phylogeny of the coccidian genus Goussia in European anurans. Divergence in the SSU rDNA sequences (3–4%) of three Goussia isolates from three anuran hosts suggests that the isolates represent three distinct species. The isolate from Pelophylax kl. esculentus was determined as Goussia neglecta. The isolates from Rana dalmatina and Rana temporaria are considered conspecific and are, on the basis of host specificity, light microscopical, ultrastructural, and molecular phylogenetic data, described as a new species, Goussia noelleri. The new Goussia species from Bufo bufo remains unnamed. During the host's metamorphosis the infection disappears, however, oocysts are retained in the liver of post-metamorphic frogs. Molecular phylogenetic analysis showed that anuran-host Goussia form a well-supported monophyletic clade, which together with a clade represented by piscine Goussia metchnikovi, constitute basal lineages of the Eimeriidae. The two lineages show polytomy, likely reflecting undersampling of the basal eimeriid taxa. Goussia janae represents a distinct lineage, sister to the clade containing the other eimeriorinid taxa, suggesting a paraphyly of the genus Goussia. The identity of G. neglecta, the status of the genus Goussia, the presence of cryptic species in anuran-host Goussia and their ecological peculiarities are discussed.
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Goussia chalupskyi n. sp. (Apicomplexa: Eimeriidae) from the chub Leuciscus cephalus (Cyprinidae)
Systematic Parasitology, 1995Co-Authors: Julius LukešAbstract:Oöcysts of Goussia chalupskyi n. sp. are described from the faeces of the chub Leuciscus cephalus (Cyprinidae) from Southern Bohemia, Czech Republic. The oöcysts are spherical, 11.0 (10.5–11.5) μm in diameter. The sporocysts are broadly oval to subspherical, 7.7 (7.0–8.5) × 5.7 (5.0–6.5) μm, with a sporocyst residuum composed of 2–4 granules. Merogonial and gamogonial stages were found in the posterior part of the intestine.
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Morphology of life cycle stages of Goussia bohemica n.sp. (apicomplexa, eimeriidae), a parasite of the goblet and epithelial cells of the gudgeon (Gobio gobio L.)
European Journal of Protistology, 1994Co-Authors: Julius LukešAbstract:Summary The life cycle of Goussia bohemica n. sp. in the intestine of the gudgeon is described. Merogonial development was confined to the goblet cells, whereas the gamogonial stages occurred both in goblet and epithelial cells. Sporogonial stages were found in epithelial cells only. Meronts gave rise to 12 merozoites by ectomerogony. In the parasitophorous vacuole of merogonial and gamogonial stages numerous irregular granules were present. Sporonts contained large dense bodies and granules of various densities in their cytoplasm. Sporulation was endogenous and oocysts often occurred enclosed in yellow bodies within the gut content.
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Goussia carpelli (Apicomplexa, Eimeriorina) from cyprinid fish: field observations and infection experiments.
Angewandte Parasitologie, 1991Co-Authors: Julius Lukeš, Dieter Steinhagen, W. KörtingAbstract:Intestinal tissue samples of 9 cyprinid and gobiid fish species from several hatcheries and ponds in South Bohemia were found to harbour Goussia carpelli-like coccidian oocysts. Furthermore, laboratory transmission of Goussia carpelli, obtained from common carp, was attempted to 9 cyprinid fish species, both laboratory reared and obtained from pond environments. Infection experiments, carried out by fecal contamination (direct transmission) and by using tubificid oligochaetes as paratenic hosts resulted in weak infections in 4 out of 15 Carassius auratus used, but it was not possible to infect any of the other fishes used.
