Kudoa alliaria in flesh of Argentinian hoki Macruronus magellanicus (Gadiformes; Merlucciidae)

Whipps, Christopher M.; Diggles, B. K.

doi:10.3354/dao069259

Cited by 38 publications

(28 citation statements)

References 23 publications

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“…Moreover, the BLAST search revealed that the ssrDNA sequence of a specimen containing tailed-spores of M. turpisrotundus was nearly identical (99.9%) to the previously published sequence of M. turpisrotundus. This is well within the intraspecific sequence variation of what has been reported for species of myxozoa (Ferguson et al, 2008;Molnár et al 2006;Whipps et al 2004;Whipps and Diggles 2006;Whipps and Kent 2006).…”

Section: Discussionsupporting

confidence: 53%

Myxobolus turpisrotundus (Myxosporea: Bivalvulida) spores with caudal appendages: investigating the validity of the genus Henneguya with morphological and molecular evidence

Liu

Whipps

et al. 2010

Parasitol Res

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Spores of the myxozoan parasite Myxobolus turpisrotundus Zhang 2009 were observed for the first time bearing caudal appendages. Most spores had the typical Myxobolus spp. morphology, but approximately 10% of spores possessed a spore body that was slightly elongated with a short tail projecting from the spore valve. In other spores, the tail was much more clearly visible and elongate. The spore body of these unusual spores is consistent in morphology and dimension to the normal spores of M. turpisrotundus. Both spore types were found within individual cysts, and the small subunit ribosomal RNA (ssrRNA) gene sequence from parasite cysts of this type was nearly identical to the previously published sequence of M. turpisrotundus from allogynogenetic gibel carp Carassius auratus gibelio (Bloch). The phenomenon of Myxobolus spores with caudal appendages provides additional evidence that the use of this character to separate Myxobolus and Henneguya into distinct genera is not reflective of an evolutionarily accurate classification scheme. Phylogenetic analysis of ssrDNA sequence from Myxobolus and Henneguya species showed clustering of species in some locations of the tree, but ultimately these genera are intermixed. The use of a single character to delineate species in the two most species-rich myxozoan genera has been consistently challenged where DNA analyses are used. The present finding of a single species bearing both Myxobolus-type and Henneguya-type spores emphasizes the inadequacy of this classification scheme, and highlights the need for careful consideration of these variable characteristics when describing myxozoan species.

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Section: Discussionsupporting

confidence: 53%

Myxobolus turpisrotundus (Myxosporea: Bivalvulida) spores with caudal appendages: investigating the validity of the genus Henneguya with morphological and molecular evidence

Liu

Whipps

et al. 2010

Parasitol Res

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“…Given that the myxozoans are sympatric, this amount of sequence variation is significantly more than that observed previously between distinct, but morphologically similar myxozoan species, which often have < 2% sequence variation (e.g. Molnar et al 2002, Whipps and Diggles 2006, Ferguson et al 2008. Hence, we are confident to describe the infection in pygmy shrews as a novel myxozoan, Soricimyxum minuti, based on specific host and SSU rDNA identity.…”

Section: Discussionmentioning

confidence: 67%

A novel myxozoan parasite of terrestrial mammals: description of Soricimyxum minuti sp. n. (Myxosporea) in pygmy shrew Sorex minutus from Hungary

Székely

Cech

Molnár

et al. 2015

Folia Parasitologica

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Abstract:As part of a biodiversity study in northwestern Hungary, we conducted a parasitological survey of small mammals. In both common shrews (Sorex araneus Linnaeus) and pygmy shrews (Sorex minutus Linnaeus), we found myxospores of a species of Soricimyxum Prunescu, Prunescu, Pucek et Lom, 2007 (Myxosporea) and plasmodia in the bile ducts within the liver. Spores from both species of shrewswere morphologically and morphometrically indistinguishable, but differed in their SSU rRNA gene sequences by 3.3%. We identified spores and developmental stages from the common shrew as Soricimyxum fegati Prunescu, Prunescu, Pucek et Lom, 2007, based on morphometric data and DNA sequence similarity. Spores from the pygmy shrew were only 96.7% similar to S. fegati, hence we identified them as a novel myxosporean Soricimyxum minuti sp. n. This is only the second myxosporean parasite species described from mammals.

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“…As demonstrated by previous studies (Andree et al 1999, Zhang et al 2010, U-taynapun et al 2011, molecular biological methods can refine traditional taxonomic classification of myxosporea. Sequence alignment revealed that the SSU rDNA sequence of M. tsangwuensis shares the 97% identity with M. musseliusae (FJ710801), 96% with M. basilamellaris (AF507971) and 90% with M. dispar (AF507972), which are generally outside the intraspecific sequence variation of what has been reported for species of myxozoans (Schlegel et al 1996, Whipps et al 2004, Molnár et al 2006, Whipps and Diggles 2006, Whipps and Kent 2006, Ferguson et al 2008. Unfortunately, the SSU rDNA sequence of M. microsporus was not available for analysis.…”

Section: Discussionmentioning

confidence: 93%

Supplementary studies on Myxobolus tsangwuensis Chen, 1954 (Myxozoa: Myxosporea) infecting the gills of common carp Cyprinus carpio (L.): molecular and histological data

Huang

Liu

Luo

et al. 2014

Acta Parasitologica

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Myxobolus tsangwuensis Chen, 1954 is a common parasite infecting the gills of common carp Cyprinus carpio (L.). It was described simply in the original description and its molecular data was absent, which makes the accurate diagnosis challenging. Here we supplemented its description based on the morphological, histological and molecular data. It was characterized by the presence of small round or ellipsoidal plasmodia in the gills of host and histology showed the plasmodia developed in the capillary network of the gill lamella. Mature spores of M. tsangwuensis were ellipsodal in frontal view and lemon shaped in lateral view, averaging 11.2 ± 0.7 (10.2-12.5) μm × 9.3 ± 0.3 (8.5-10.0) μm × 6.2 ± 0.4 (5.5-7.0) μm. Spores valves were symmetrical and smooth. Occasionally, a small intercapsular appendix was observed. Two polar capsules were pyriform with different sizes, measuring 5.0 ± 0.2 (4.4-5.3) μm × 3.1 ± 0.1 (2.9-3.5) μm and 3.9 ± 0.2 (3.4-4.3) μm × 2.5 ± 0.2 (2.0-2.8) μm, respectively. Polar filaments coiled five to seven turns in large polar capsule and three to four turns in the small polar capsule. Some spores were surrounded by the mucous envelope that was not recorded in the original description. Molecular analysis revealed that the present SSU rDNA sequences did not match any available sequences in GenBank and phylogenetic analysis showed M. tsangwuensis was sister to M. basilamellaris and M. musseliusae.

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Kudoa alliaria in flesh of Argentinian hoki Macruronus magellanicus (Gadiformes; Merlucciidae)

Cited by 38 publications

References 23 publications

Myxobolus turpisrotundus (Myxosporea: Bivalvulida) spores with caudal appendages: investigating the validity of the genus Henneguya with morphological and molecular evidence

Myxobolus turpisrotundus (Myxosporea: Bivalvulida) spores with caudal appendages: investigating the validity of the genus Henneguya with morphological and molecular evidence

A novel myxozoan parasite of terrestrial mammals: description of Soricimyxum minuti sp. n. (Myxosporea) in pygmy shrew Sorex minutus from Hungary

Supplementary studies on Myxobolus tsangwuensis Chen, 1954 (Myxozoa: Myxosporea) infecting the gills of common carp Cyprinus carpio (L.): molecular and histological data

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