Myxozoan infections in fishes of the Tasik Kenyir Water Reservoir, Terengganu, Malaysia

Székely, Csaba; Shaharom-Harrison, Faizah; Cech, Gábor; Ostoros, Györgyi; Molnár, Kálmán

doi:10.3354/dao01991

Cited by 38 publications

(13 citation statements)

References 22 publications

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“…However, the muscle‐infecting M . tasikkenyirensis and kidney‐infecting M. csabai are included in the clade, which is consistent with the results of Székely, Shaharom‐Harrison, Cech, Ostoros & Molnár (2009). On the other hand, some species dwelling in cyprinid gills, such as M. musseliusae, M. pavlovskii and M. ellipsoides , are genetically distant from this clade.…”

Section: Discussionsupporting

confidence: 87%

Utilization of tissue habitats by Myxobolus wulii Landsberg & Lom, 1991 in different carp hosts and disease resistance in allogynogenetic gibel carp: redescription of M. wulii from China and Japan

Zhang

Yokoyama

Wang

et al. 2009

Journal of Fish Diseases

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Myxobolus wulii (=Myxosoma magna) was first described from the gills of goldfish, Carassius auratus auratus, in China. Subsequently, a myxosporean infecting the hepatopancreas of allogynogenetic gibel carp, C. auratus gibelio, was designated as a different species, Myxobolus guanqiaoensis, although the morphological features were almost identical to those of M. wulii. In Japan, an unidentified Myxobolus sp. was found in the gills and hepatopancreas of goldfish. Morphological and molecular analyses in the present study identified these myxosporeans as M. wulii, which was thus shown to use different habitats in the host fish. Phylogenetic analyses of small subunit ribosomal RNA gene sequences showed that M. wulii is closely related to two gillinfecting Myxobolus species, M. ampullicapsulatus and M. longisporus. Fish infected with M. wulii in the hepatopancreas exhibit swollen abdomens and chronic mortality. Hepatopancreas tissues are virtually destroyed and replaced with plasmodia of M. wulii. A remarkable difference in susceptibility to M. wulii between two clones of allogynogenetic gibel carp was observed, suggesting that resistance to the myxosporean infection was established in a clone of fish bred by allogynogenesis.

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Section: Discussionsupporting

confidence: 87%

Utilization of tissue habitats by Myxobolus wulii Landsberg & Lom, 1991 in different carp hosts and disease resistance in allogynogenetic gibel carp: redescription of M. wulii from China and Japan

Zhang

Yokoyama

Wang

et al. 2009

Journal of Fish Diseases

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“…4), earlier studies had suggested this was a consistent grouping of gill-infecting species (Zhao et al 2008). However, the placement of M. csabai (kidney) and M. tasikkenyirensis (muscle) described by Székely et al (2009) as well as M. honghuensis n. sp. within this clade forces the rejection of the hypothesis that tissue specificity could be predictive within this group.…”

Section: Discussionmentioning

confidence: 83%

“…Using spore morphology alone, it is often difficult to determine the validity of morphologically similar myxosporea, particularly those with identical tissue affinity and that develop in taxonomically closely related host species (Molnár et al 2002). As such, molecular biological methods are becoming mainstream in Myxobolus species identification (Eszterbauer and Székely 2004;Székely et al 2009;Liu et al 2010b).…”

Section: Introductionmentioning

confidence: 99%

Myxobolus honghuensis n. sp. (Myxosporea: Bivalvulida) parasitizing the pharynx of allogynogenetic gibel carp Carassius auratus gibelio (Bloch) from Honghu Lake, China

Liu

Whipps

et al. 2011

Parasitol Res

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Myxobolus honghuensis n. sp. is described from allogynogenetic gibel carp Carassius auratus gibelio (Bloch), during a survey of myxosporean parasites in Honghu Lake, Hubei Province, China. It is characterized by the presence of round plasmodia of 5-12 mm in diameter in the pharynx of host. Mature spores of M. honghuensis were pyriform in frontal view and anterior pointed with bluntly round posterior, they measured 16.9 ± 0.5 (15.1-19.5) μm long, 10.4 ± 0.4 (9.0-11.3) μm wide, and 8.4 ± 0.4 (7.9-9.1) μm thick. Two polar capsules were pyriform and slightly unequal with larger polar capsule 8.4 ± 0.4 (7.6-10.2) μm × 3.9 ± 0.2 (3.0-4.5) μm and smaller capsule 7.9 ± 0.2 (7.0-9.3) μm × 3.7 ± 0.3 (2.8-4.1) μm. Polar filaments coiled with seven to eight turns. Both morphology and DNA sequence data revealed that M. honghuensis n. sp. was distinct from other described Myxobolus species. Phylogenetic analysis placed M. honghuensis n. sp. in a clade of gill-infecting myxobolids.

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“…With the use of these classical zoological methods, it is very difficult to determine the validity of morphologically similar myxosporea with identical tissue affinity and that develop in taxonomically closely related host species (Molnár et al 2002(Molnár et al , 2009. Although host, organ, and tissue specificity are great help in differentiating morphologically identical or similar spores (Lom and Arthur 1989;Molnár 1994), molecular biological methods are often necessary to resolve species (Eszterbauer and Székely 2004;Székely et al 2009b).…”

Section: Introductionmentioning

confidence: 98%

Some additional data to the occurrence, morphology and validity of Myxobolus turpisrotundus Zhang, 2009 (Myxozoa: Myxosporea)

Liu

Luo

2010

Parasitol Res

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Myxobolus turpisrotundus Zhang, 2009, infects allogynogenetic gibel carp Carassius auratus gibelio (Bloch) and is always regarded as synonymous with Myxobolus rotundus Nemeczek, 1911, since its first report in goldfish Carassius auratus auratus (L.) in China in 1955. In this study, it was comprehensively examined by morphological and molecular biological methods. The round spores of M. turpisrotundus are similar to those of M. rotundus from common bream Abramis brama (L.) in morphology; however, we detected slight differences in morphometry. The ratios of the length and width of the spore to the length and width of the polar capsule of M. turpisrotundus are usually below 2.0 and 1.9, respectively, however these ratios are always above 2.0 and 1.9 in M. rotundus. The plasmodium size of M. turpisrotundus is 600-6,200 microm in diameter and that of M. rotundus is 60-180 microm in diameter. Scanning observation showed the spore surface of M. turpisrotundus was generally pitted. Yet the surface of M. rotundus is smooth. Sequence comparison revealed the small subunit ribosomal RNA gene sequence of M. turpisrotundus did not match any published sequences of M. rotundus (EU710583, 85% over 742 bp; FJ851447, 85% over 742 bp, FJ851448, 85% over 742 bp; FJ851449, 85% over 742 bp). Moreover, phylogenetic analysis showed M. turpisrotundus clustered with the species from allogynogenetic gibel carp with high bootstrap values (100% neighbor-joining, NJ; 100% maximum parsimony, MP) and M. rotundus from common bream composed a new cluster with high bootstrap values (100% NJ, 100% MP). From the morphological and molecular biological data, we gain enough evidences to support the validity of M. turpisrotundus.

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Myxozoan infections in fishes of the Tasik Kenyir Water Reservoir, Terengganu, Malaysia

Cited by 38 publications

References 22 publications

Utilization of tissue habitats by Myxobolus wulii Landsberg & Lom, 1991 in different carp hosts and disease resistance in allogynogenetic gibel carp: redescription of M. wulii from China and Japan

Utilization of tissue habitats by Myxobolus wulii Landsberg & Lom, 1991 in different carp hosts and disease resistance in allogynogenetic gibel carp: redescription of M. wulii from China and Japan

Myxobolus honghuensis n. sp. (Myxosporea: Bivalvulida) parasitizing the pharynx of allogynogenetic gibel carp Carassius auratus gibelio (Bloch) from Honghu Lake, China

Some additional data to the occurrence, morphology and validity of Myxobolus turpisrotundus Zhang, 2009 (Myxozoa: Myxosporea)

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