J. C. Eiras

Universidade do Porto

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Gilberto Cezar Pavanelli

Centro Universitário Cesumar

Aurélia Saraiva

Universidade do Porto

Cristina Cruz

Universidade do Porto

Ricardo Massato Takemoto

Universidade Estadual de Maringá

Thomas Wahli

University of Bern

B. G. Kapoor

University of Tennessee at Knoxville

Helmut Segner

Helmholtz Centre for Environmental Research

Rodrigo Yudi Fujimoto

Brazilian Agricultural Research Corporation

Daniel Guerreiro Diniz

Universidade Federal do Pará

Edson A. Adriano

Universidade Federal de São Paulo

Cooperative Institutions

Universidade do Porto

Universidade Federal do Pará

Universidade de São Paulo

Universidade Estadual Paulista (Unesp)

Universidade Estadual de Maringá

Centro Interdisciplinar de Investigação Marinha e Ambiental

Instituto de Investigacao das Pescas e do Mar

University of Lisbon

Universidade de Santiago de Compostela

Universidade Federal do Rio Grande

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Myxobolus franciscoi sp. nov. (Myxozoa: Myxosporea: Myxobolidae), a parasite of Prochilodus argenteus (Actinopterygii: Prochilodontidae) from the Upper São Francisco River, Brazil, with a revision of Myxobolus spp. from South America

Zoologia (Curitiba) (2010)

J. C. Eiras Cassandra M. Monteiro Marília de Carvalho Brasil-Sato

Myxobolus franciscoi sp. nov. (Myxozoa: Myxosporea: Myxobolidae) is described from the "curimatá-pacú" fish, Prochilodus argenteus Spix & Agassiz, 1829 (Actinopterygii: Prochilodontidae) from the Upper São Francisco River, Brazil. This parasite forms whitish plasmodia (about 1 x 1 mm) that develop in the connective tissue of fins. The spores are more or less round in frontal view and ellipsoidal in lateral view, measuring 6.4 (6.0-6.9) µm in length, by 6.0 (5.8-6.4) µm in width and 3.2 µm in thickness. The polar capsules are very small, measuring about 2 µm in length by 1.5 µm in width and ending in a tapered anterior neck. The polar filament makes three turns in a plane at right angles with the longitudinal axis of the spore. Thorough comparisons with the remaining species of Myxobolus Bütschli, 1882 described from South American fish, as well as with almost all species of Myxobolus described so far, are provided. This paper also includes a revision of Myxobolus species from South American fish hosts.

Myxosporea

Myxobolus

Myxozoa

Actinopterygii

Characiformes

Anticline

10.1590/s1984-46702010000100020

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Citations (18)

Comparison of the Myxobolus fauna of common barbel from Hungary and Iberian barbel from Portugal

Diseases of Aquatic Organisms (2012)

Kálmán Molnár Edit Eszterbauer S. Marton Csaba Székely J. C. Eiras

DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials DAO 100:231-248 (2012) - DOI: https://doi.org/10.3354/dao02469 Comparison of the Myxobolus fauna of common barbel from Hungary and Iberian barbel from Portugal K. Molnár1,*, E. Eszterbauer1, Sz. Marton1, Cs. Székely1, J. C. Eiras2 1Institute for Veterinary Medical Research, Centre for Agricultural Research, HAS, POB 18, 1581 Budapest, Hungary 2Departamento de Biologia, e CIIMAR, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, s/n, Edifício FC4, 4169-007 Porto, Portugal *Email: molnar@vmri.hu ABSTRACT: We compared Myxobolus infection of common barbel Barbus barbus from the Danube River in Hungary with that in Iberian barbel Luciobarbus bocagei from the Este River in Portugal. In Hungary, we recorded 5 known Myxobolus species (M. branchialis, M. caudatus, M. musculi, M. squamae, and M. tauricus) and described M. branchilateralis sp. n. In Portugal we recorded 6 Myxobolus species (M. branchialis, M. branchilateralis sp. n., M. cutanei, M. musculi, M. pfeifferi, and M. tauricus). Species found in the 2 habitats had similar spore morphology and only slight differences were observed in spore shape or measurements. All species showed a specific tissue tropism and had a definite site selection. M. branchialis was recorded from the lamellae of the gills, large plasmodia of M. branchilateralis sp. n. developed at both sides of hemibranchia, M. squamae infected the scales, plasmodia of M. caudatus infected the scales and the fins, and M. tauricus were found in the fins and pin bones. In the muscle, 3 species, M. musculi, M. pfeifferi and M. tauricus were found; however they were found in distinct locations. Plasmodia of M. musculi developed intracellularly in muscle cells, plasmodia of M. tauricus were found in the dense connective tissue of the pin bones, whereas M. pfeifferi formed plasmodia in the connective tissue of the intramuscular septa. This latter species was often found in the cartilaginous gill arch as well. Comparative morphological and phylogenetic studies, as well as 18S rDNA sequences, revealed differences between the Myxobolus fauna of the 2 barbel species originating from different geographic regions. KEY WORDS: Myxozoa · Occurrence · Histology · Site selection · Phylogeny · Hungary · Portugal Full text in pdf format PreviousNextCite this article as: Molnár K, Eszterbauer E, Marton S, Székely C, Eiras JC (2012) Comparison of the Myxobolus fauna of common barbel from Hungary and Iberian barbel from Portugal. Dis Aquat Org 100:231-248. https://doi.org/10.3354/dao02469 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in DAO Vol. 100, No. 3. Online publication date: September 12, 2012 Print ISSN: 0177-5103; Online ISSN: 1616-1580 Copyright © 2012 Inter-Research.

Myxobolus

Barbel

Myxozoa

10.3354/dao02469

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Citations (27)

ADermocystidiuminfection inTrichomycterussp. (Osteichthyes, Trichomycteridae)

Parasite (2000)

J. C. Eiras Ângela Teresa Silva-Souza

Two whitish elongate cysts in the left pectoral fin of Trichomycterus sp. (Osteichthyes, Trichomycteridae) were packed with Dermocystidium sp. spores. The spores were spherical and had a large PAS positive central refractile body, the cytoplasm being restricted to a narrow peripheral layer containing the nucleus. The cysts were surrounded by a thin homogeneous wall of parasite origin, and there was no encapsulation of the cysts by host tissue.

Fish fin

10.1051/parasite/2000074323

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Citations (13)

Synopsis of the species of Myxidium Bütschli, 1882 (Myxozoa: Myxosporea: Bivalvulida)

Systematic Parasitology (2011)

J. C. Eiras Aurélia Saraiva Cristina Cruz Maria J. Santos Ivan Fiala

Myxosporea

Myxozoa

Animal ecology

10.1007/s11230-011-9315-x

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Amoeboid protists as parasites of fish.

Iva Dyková J. C. Eiras Helmut Segner Thomas Wahli B. G. Kapoor

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Citations (3)

Synopsis of the species of Myxobolus (Cnidaria, Myxozoa, Myxosporea) described between 2014 and 2020

Folia Parasitologica (2021)

J. C. Eiras Cristina Cruz Aurélia Saraiva Edson A. Adriano

A synopsis of the species of Myxobolus Bütschli, 1882 (Cnidaria, Myxosporea, Myxobolidae) described from 2014 up till now is presented.It includes 122 nominal species described all over the world.For each of the species, the most relevant morphological and morphometric data, as well as data are provided related to the location in the host, type host and type locality.The GenBank accession numbers are provided whenever possible, and the spores were redrawn based on the original descriptions.The bibliography includes all the papers containing the species descriptions.

Myxosporea

Myxozoa

Myxobolus

10.14411/fp.2021.012

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Citations (60)

A histology-based fish health assessment of farmed seabass (Dicentrarchus labrax L.)

Aquaculture (2015)

Aurélia Saraiva Joana Costa Joana Serrão Cristina Cruz J. C. Eiras

Dicentrarchus

Hyperaemia

Histology

Vacuolization

Hemosiderin

Histopathology

10.1016/j.aquaculture.2015.06.028

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Citations (60)

Myxobolus goensisn. sp. (Myxozoa, Myxosporea, Myxobolidae), a parasite of the gills ofMugil cephalus(Osteichthyes, Mugilidae) from Goa, India

Parasite (2004)

J. C. Eiras James D’Souza

Two species of Myxobolus are reported from the gills of Mugil cephalus collected at Goa, India: M. goensis n. sp. and M, parvus Shulman, 1962. Myxobolus goensis n. sp. forms digitiform or rounded plasmodia between the gill rakers. Their spores are oval in frontal view, with tapered anterior extremity, and lemon-shaped in lateral view, measuring 9.7 (9.5-10.5) μm in length, 6.6 (6-7.5) μm in width, and 5.2 (5-6) μm in thickness. The polar capsules are pyriform and unequal in size. The larger ones are 5.3 (4.5-6) µm long and 2.4 (2-3) µm wide; the smaller ones are 2.4 (2-3) μm long and 1 .8 (1 .5-2) µm wide. The polar filament forms five turns aligned perpendicularly to the longitudinal axis of the larger polar capsules. Within the smaller polar capsules the polar filament is difficult to observe and, apparently, forms three coils. The spores are distinctly different from other Myxobolus species infecting M. cephalus and other Mugil spp. Furthermore, the present material is also different from 204 Myxobolus species presenting differently sized polar capsules, representing nearly all the known species with this characteristic. The fact that only the M. cephalus specimens were infected among a sample of 206 fish specimens, comprising 27 different species, strongly suggests that this parasite is specific to M. cephalus.

Myxobolus

Mugil

Myxosporea

Myxozoa

Polar filament

Mullet

10.1051/parasite/2004113243

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Citations (24)

Haemogregarina bigemina Laveran & Mesnil, 1901 (Protozoa, Apicomplexa) from Blennius pholis L. (Osteichthyes, Blenniidae): an investigation of seasonality in Portugal

Journal of Fish Diseases (1991)

J. C. Eiras A.J. Davies