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Samshuri MÁ, Borkhanuddin MH. Myxobolus acanthogobii Hoshina, 1952 and Myxobolus selari n. sp. (Myxosporea: Myxobolidae) infecting brain of commercial fishes in Terengganu, Malaysia. Syst Parasitol 2024; 101:39. [PMID: 38733439 DOI: 10.1007/s11230-024-10162-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 04/02/2024] [Indexed: 05/13/2024]
Abstract
Myxosporean infection in marine water fishes has drawn less attention than in freshwater fishes, which resulted in a higher taxonomic variety in freshwater in Malaysia. This study aimed to address the gap by conducting a myxosporean survey on two commercially significant marine fish species, Nemipterus furcosus (Valenciennes) (Eupercaria incertae sedis: Nemipteridae) and Selar crumenophthalmus (Bloch) (Carangiformes: Carangidae), collected from the northeastern part of peninsular Malaysia. During the examination of the organs, two distinct Myxobolus Bütschli, 1882 species were discovered in the brain tissue of these fishes, despite the absence of any observable pathological signs. The two Myxobolus species were characterized through morphometry, morphology, and analysis of partial small subunit ribosomal RNA (18S rDNA) gene. As a result, Myxobolus acanthogobii Hoshina, 1952, which infects 2.3% of N. furcosus, is synonymous with a myxobolid species commonly found in Japanese waters, based on its morphological traits, tissue tropism, and molecular diagnostics. Furthermore, a novel species, Myxobolus selari n. sp., was described, infecting the brain of one (11%) individual S. crumenophthalmus. This unique species displayed distinctive features, placing it within a well-supported subclade primarily comprising brain-infecting myxobolids. Maximum likelihood analysis further revealed the close relationships among these brain-infecting myxobolids, underscoring the significance of tissue tropism and host taxonomy for myxobolids. This study represents the initial documentation of Myxobolus species within the southern South China Sea, shedding light on the potential diversity of marine myxosporean in this region. This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as urn:lsid:zoobank.org:pub:7C400E35-7CB8-4DEE-92B7-F75FF3926441.
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Affiliation(s)
- Muhammad Árif Samshuri
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - Muhammad Hafiz Borkhanuddin
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
- Institute of Oceanography and Environment, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
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Zhao X, Xu L, Shisi R, Wei Q, Yin Q, Yang Y, Zhang J, Xiang J, Yu J, Li D, Liu X. Myxobolus dumerilii sp. n. (Myxozoa: Myxobolidae) infecting the brain of Chinese longsnout catfish Tachysurus dumerili (Bleeker) in China. Syst Parasitol 2023; 100:715-723. [PMID: 37853231 DOI: 10.1007/s11230-023-10119-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 09/20/2023] [Indexed: 10/20/2023]
Abstract
During an investigation of Myxobolus diversity in the Chinese longsnout catfish Tachysurus dumerili (Bleeker), a new species infecting the intracranial epidermis of the host was discovered. Upon opening the cranial cavity, several round whitish plasmodia measuring 0.55-0.80 mm in diameter were observed. Fresh spores (n= 50) were pyriform in the frontal view and fusiform in the sutural view, with a length of 15.4±0.6 (13.9-16.5) μm, width of 9.1±0.4 (8.3-9.8) μm, and thickness of 7.0±0.4 (6.3-7.9) μm. The spores had smooth shell surfaces and transparent membrane sheaths in the posterior. No folds, intercapsular appendix, and caudal appendages were observed. Two equal polar capsules were pyriform and measured 7.5±0.5 (6.7-8.7) μm in length and 3.2±0.3 (2.5-3.6) μm in width. The polar filaments were coiled with five to six turns and perpendicular to the polar capsule length. A BLAST search indicated M. dumerilii sp. n. was closely related to five Myxobolus species (with sequences similarities ranging from 90.54% to 96.52%) found in different organs of yellow catfish Tachysurus fulvidraco (Richardson), rather than the T. dumerili-infecting species M. branchiola Dong and Zhao, 2014 (with 90.5% sequence similarity). Phylogenetic analysis showed that M. dumerilii sp. n. didn't form sister clade with brain-infecting Myxobolus spp, but clustered with M. jianlinensis Gao et Zhao, 2020 and M. voremkhai Akhmerov, 1960 within the Siluriformes-clade with highly supported values, indicating that the host specificity may play a stronger signal than site infections during the evolution of Myxobolus species. Based on the morphological, ecological, and molecular differences observed between the newly discovered species and other available Myxobolus species, M. dumerilii sp. n., is proposed and described in this study.
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Affiliation(s)
- Xiaojing Zhao
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Fisheries College, Hunan Agricultural University, Changsha, 410128, China
| | - Liwen Xu
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Ren Shisi
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Fisheries College, Hunan Agricultural University, Changsha, 410128, China
| | - Qiang Wei
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Fisheries College, Hunan Agricultural University, Changsha, 410128, China
| | - Qi Yin
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Fisheries College, Hunan Agricultural University, Changsha, 410128, China
| | - Yijing Yang
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Fisheries College, Hunan Agricultural University, Changsha, 410128, China
| | - Jinyong Zhang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, Shandong, China
| | - Jianguo Xiang
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Fisheries College, Hunan Agricultural University, Changsha, 410128, China
| | - Jianbo Yu
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Fisheries College, Hunan Agricultural University, Changsha, 410128, China
| | - Deliang Li
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Fisheries College, Hunan Agricultural University, Changsha, 410128, China
| | - Xinhua Liu
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Fisheries College, Hunan Agricultural University, Changsha, 410128, China.
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Zhang J, Wang Y, Zhao Y. The description of Myxobolus meijiangensis n. sp. (Myxozoa: Myxobolidae) and its pathogenicity to the gills of goldfish. Parasitol Int 2023; 97:102795. [PMID: 37574004 DOI: 10.1016/j.parint.2023.102795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 08/09/2023] [Accepted: 08/11/2023] [Indexed: 08/15/2023]
Abstract
Myxobolus Bütschli, 1882 is the most speciose myxozoan genus, although some species have only been described according to the morphological characteristics of spores. In the present study, a new Myxobolus species infecting the gill lamellae of goldfish from Chongqing, China, was described using a comprehensive analysis of morphological, molecular, and histological data. Mature spores were flat-pear in valvular view with tapering anterior and rounded posterior ends, measuring 11.0 ± 0.4 (10.4-11.6) μm in length and 10.3 ± 0.3 (9.6-11.0) μm in width. Two equal-sized elongate pyriform polar capsules were 5.6 ± 0.6 (4.5-6.4) μm long and 3.5 ± 0.5 (2.4-4.1) μm wide. Polar tubules were coiled with 8 or 9 turns. The small-subunit ribosomal DNA gene sequence length of the present species was 1951 nt, and the highest similarity was 97.99% with M. pyramidis. Comparative analysis of the morphological and molecular data revealed that the present species was distinct from other known myxosporeans. Plasmodia were located at the interlamellar troughs nearing the top of the primary gills. Infection by the present species destroyed the original structure of gill lamellae and caused an inflammatory response, eventually leading to fish dyspnea. The morphological, molecular, and pathological data from the present study can be used for aquaculture since they provide guidance for easy detection and future control of this myxosporidiosis.
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Affiliation(s)
- Jinye Zhang
- Animal Biology Key Laboratory of Chongqing Education Commission of China, College of Life Sciences, Chongqing Normal University, Chongqing 401331, People's Republic of China
| | - Yueru Wang
- Animal Biology Key Laboratory of Chongqing Education Commission of China, College of Life Sciences, Chongqing Normal University, Chongqing 401331, People's Republic of China; Chongqing Key Laboratory of Animal Biology, Chongqing Normal University, Chongqing 401331, People's Republic of China
| | - Yuanjun Zhao
- Animal Biology Key Laboratory of Chongqing Education Commission of China, College of Life Sciences, Chongqing Normal University, Chongqing 401331, People's Republic of China.
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Ghai N, Nissa K, Kaur H. Myxobolus coriumicus n.sp. (Cnidaria: Myxozoa) Causing Scale Disease Associated with Skin Lesions in Indian Cultured Carp, Cirrhinus mrigala in Punjab. Acta Parasitol 2023; 68:769-781. [PMID: 37596457 DOI: 10.1007/s11686-023-00714-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 08/01/2023] [Indexed: 08/20/2023]
Abstract
PURPOSE The motive of the present study was to investigate incidences of myxozoan parasite infection in commercially important fishes and their characterization using morphological attributes and molecular approach. METHODS The specimens of cultured Cirrhinus mrigala were sampled and various organs were examined. The plasmodia were detected on the scales. The identification of species was based on the myxospore morphology and 18S rDNA sequence analyses. For phylogenetic analysis, maximum likelihood (ML) and Bayesian inference (BI) methods were employed. The SEM and histological studies were performed to assess the damage to the scales. RESULTS The infected fishes had white patches on the scales and red haemorrhagic lesions on the skin. The plasmodia of Myxobolus coriumicus n. sp. were located on the dorsal surface of the scale towards its exposed part. SEM study indicated that lepidonts were damaged in the infected scales. The myxospores were spherical in shape, 9.0-10.0 × 8.0-9.0 [Formula: see text]m in size, with two ovoid equal polar capsules 3.13-4.0 × 2.03-2.33 [Formula: see text]m in size, having 4-5 sutural edge markings at the posterior-lateral margins of the shell valves and binucleated sporoplasm. BLAST search based on 18S rDNA revealed 93.87% sequence similarity with M. rewensis, (MZ230381). The prevalence of infection was 6.3% and Scale Plasmodium Index (SPI) was 3 indicating heavy infection. CONCLUSION Morpho-molecular data generated during this study enables us to conclude that the present species, M. coriumicus n. sp. infecting scales of C. mrigala is new to the science causing significant damage to the scales.
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Affiliation(s)
- Nitin Ghai
- Parasitology Laboratory, Department of Zoology, Panjab University, Chandigarh, India
| | - Kharoon Nissa
- Parasitology Laboratory, Department of Zoology, Panjab University, Chandigarh, India
| | - Harpreet Kaur
- Parasitology Laboratory, Department of Zoology, Panjab University, Chandigarh, India.
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D-D Batueva M, Vlasenko P, Solovyev MM, Abasheev RY. Myxobolus nekrasovae n. sp. (Cnidaria, Myxozoa) is a new species parasitizing the gills of the gibel carp, Carassius auratus gibelio. Microb Pathog 2023; 185:106454. [PMID: 37977481 DOI: 10.1016/j.micpath.2023.106454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 11/09/2023] [Accepted: 11/12/2023] [Indexed: 11/19/2023]
Abstract
A new Myxobolus species, Myxobolus nekrasovi n. sp., was found in the gill arch of the gibel carp Carassius auratus gibelio during investigation of fish myxosporean fauna of ponds of Lake Baikal basin. The parasites were studied on the basis of spore morphology, as well as with histological and molecular methods. Mature spores of M. nekrasovi n. sp. are ellipsoidal in frontal view and lemon-shaped in lateral view, measuring 13.84 ± 0.4 (12.2-15) μm in length, 9.73 ± 0.2 (8.5-10.7) μm in width, 6,75 ± 0.1 (6.0-7.6) μm in thickness. Polar capsules are unequal and pyriform, measuring: length 6.31 ± 0.1 (5.4-7.4), width 3.49 ± 0.04 (3.12-4) μm and length 2.88 ± 0.1 (2.1-3.5), width 1.4 ± 0.03 (1-1.6) μm. Phylogenetic analysis with the SSU rDNA gene shows Myxobolus nekrasovae n. sp. as a sister species of the subclade formed by Thellohanellus sinensis, Myxobolus acutus, M. zhaltsanovae that infect gibel carp Carassius auratus gibelio.
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Affiliation(s)
- Marina D-D Batueva
- Institute of General and Experimental Biology of Siberian Branch, Russian Academy of Sciences, 670047, Ulan - Ude, Russia.
| | - Pavel Vlasenko
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia; A.N. Severtsov Institute of Ecology and Evolution, 192 Russian Academy of Sciences, Moscow, Russia
| | - Mikhail M Solovyev
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia; A.N. Severtsov Institute of Ecology and Evolution, 192 Russian Academy of Sciences, Moscow, Russia; Tomsk State University, Tomsk, Russia
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Zhang B, Guo Q, Tu X, Gu Z. Identification of Myxobolus distalisensis n. sp. (Cnidaria: Myxozoa) infecting yellow catfish Tachysurus fulvidraco (Richardson), with a supplement description of M. voremkhai (Akhmerov, 1960) Landsberg and Lom, 1991. Syst Parasitol 2023; 100:473-485. [PMID: 37314635 DOI: 10.1007/s11230-023-10098-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 05/18/2023] [Indexed: 06/15/2023]
Abstract
With growing scale of intensive fish cultivation, the risk of parasite infection in commercial fish is increased. Precisely identifying and characterizing the parasites that infect the farmed fish is critical to understanding the dynamics of their communities. Here, two species of Myxobolus were identified in farmed yellow catfish Tachysurus fulvidraco (Richardson) in China. Myxobolus distalisensis n. sp. developed plasmodia in the gill filaments, with oval to elliptical myxospores measuring 11.3 ± 0.6 (10.4-12.6) × 8.1 ± 0.3 (7.5-8.6) × 5.5 ± 0.2 (5.2-5.8) μm. Two pyriform polar capsules of equal size were measured 5.3 ± 0.4 (4.5-6.3) × 2.7 ± 0.1 (2.3-3) μm. Myxobolus voremkhai (Akhmerov, 1960) Landsberg and Lom, 1991 developed plasmodia in the gill arch and had a myxospore morphology similar to the conspecific isolates described in previous studies. The consensus sequences of M. distalisensis was remarkably distinct from those deposited in the GenBank, with exception of whereas M. voremkhai showing 99.84% identity. The genetic data on both isolates differed considerably from each other, revealing only 86.96% molecular identity. Histologically, M. distalisensis resided in the filament cartilage, and the aggressive proliferation of the sporogenic stages led to lytic cartilage corrosion. In contrast, plasmodia of M. voremkhai grossly observed at the base of the gill filament were embedded by the connective tissue in the gills arch. Phylogenetically, both isolates were separately placed in different subclades, indicating difference in their evolutionary history. Besides, the taxon under the family Myxobolidae was demonstrated non-monophyletic origins, and parasite radiation largely followed their host affinity.
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Affiliation(s)
- Bo Zhang
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, 1 Shi Zi Shan Street, Wuhan, 430070, People's Republic of China
- Hubei Engineering Technology Research Center for Aquatic Animal Diseases Control and Prevention, Wuhan, 430070, People's Republic of China
- Hubei Hongshan Laboratory, Wuhan, 430070, People's Republic of China
- National Aquatic Animal Diseases Para-Reference Laboratory, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Qingxiang Guo
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, 1 Shi Zi Shan Street, Wuhan, 430070, People's Republic of China
| | - Xiao Tu
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, 1 Shi Zi Shan Street, Wuhan, 430070, People's Republic of China
- Hubei Engineering Technology Research Center for Aquatic Animal Diseases Control and Prevention, Wuhan, 430070, People's Republic of China
- Hubei Hongshan Laboratory, Wuhan, 430070, People's Republic of China
- National Aquatic Animal Diseases Para-Reference Laboratory, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Zemao Gu
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, 1 Shi Zi Shan Street, Wuhan, 430070, People's Republic of China.
- Hubei Engineering Technology Research Center for Aquatic Animal Diseases Control and Prevention, Wuhan, 430070, People's Republic of China.
- Hubei Hongshan Laboratory, Wuhan, 430070, People's Republic of China.
- National Aquatic Animal Diseases Para-Reference Laboratory, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
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Silva MFD, Silva DTD, Giese E, Furtado AP, Matos P, Lima AM, Hamoy I, Matos E. Phylogeny and ultrastructure of Myxobolus rangeli n. sp. (Myxozoa, Bivalvulida), a histozoic parasite in Siluriformes fish from the Amazon region. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA = BRAZILIAN JOURNAL OF VETERINARY PARASITOLOGY : ORGAO OFICIAL DO COLEGIO BRASILEIRO DE PARASITOLOGIA VETERINARIA 2023; 32:e005923. [PMID: 37341287 DOI: 10.1590/s1984-29612023034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 05/08/2023] [Indexed: 06/22/2023]
Abstract
A new species of Myxobolus parasitizing the arterial bulb and cardiac musculature of the freshwater fish Pimelodus ornatus Kner, 1858, from the Arari river in the municipality of Cachoeira do Arari, island of Marajó, Pará, Brazil, was described. In the present study, the observed prevalence of myxozoan parasites in the heart tissue of the hosts was 20% (6/30). The myxozoans observed had mature biconvex spores, slightly rounded, an anterior end with two pyriform polar capsules and a posterior end with very evident sporoplasm, measuring 8 ± 0.2 μmin length. The spore width was 5.8 ± 0.4 μm, with a thickness of 3.4 ± 0.2μm. The length of the polar capsules was 3.6 ± 0.3 μm and the width was 1.2 ± 0.2μm, with 6 to 7 turns of the polar filament. The divergences observed, regarding the morphometric and genetic structure of SSU rDNA, in relation to other Myxobolidae already described in the literature, confirm the description of the new species Myxobolus rangeli n. sp.
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Affiliation(s)
| | | | - Elane Giese
- Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil
| | | | | | | | - Igor Hamoy
- Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil
| | - Edilson Matos
- Universidade Federal do Pará - UFPA, Belém, PA, Brasil
- Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil
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Zhang B, Tu X, Gu Z. Myxobolus shuifuensis sp. n. (Myxozoa: Myxobolidae) infecting the exotic mrigal Cirrhinus mrigala feral in China. Parasitol Int 2023; 94:102732. [PMID: 36623801 DOI: 10.1016/j.parint.2023.102732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 12/22/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023]
Abstract
Myxobolus species represents a group of cosmopolitan metazoan parasites commonly harbored in the farmed and wild fish populations. Here, a species of Myxobolus is found in the kidney of an exotic mrigal Cirrhinus mrigala feral in the Yangtze River and utilized for an integrative characterization. Ellipsoidal myxospores are measured at 15.68 ± 0.8 (13.93-17.11) × 11.42 ± 0.54 (10.34-12.3) × 7.94 ± 0.35 (7.58-8.5) μm in dimension. The polar capsules are pyriform, and unequal in size. The morphological and morphometric characteristics of the present isolates are distinct from those of other congeners. Molecularly, the pairwise comparison based on the SSU rDNA sequence indicates that the present amplicon does not match any sequences available in the GenBank database and shares the highest similarity of 92.12% to Myxobolus pavlovskii (MG520369). Accordingly, we propose a name Myxobolus shuifuensis sp. n. for the present isolates. Phylogenetical trees indicate an apparent host-associated phylogenetic pattern. M. shuifuensis sp. n. groups loosely with other Myxobolus species isolated from Cirrhinus fish. Insead, it forms a sister clade to some myxosporeans belonging to the Thelohanellus genus. This result underpins the species identification and provides evidence for challenging the taxonomic separation among both morphologically comparable genera.
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Affiliation(s)
- Bo Zhang
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, People's Republic of China; Hubei Engineering Technology Research Center for Aquatic Animal Diseases Control and Prevention, Wuhan, People's Republic of China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, People's Republic of China; National Aquatic Animal Diseases Para-reference laboratory, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Xiao Tu
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, People's Republic of China; Hubei Engineering Technology Research Center for Aquatic Animal Diseases Control and Prevention, Wuhan, People's Republic of China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, People's Republic of China; National Aquatic Animal Diseases Para-reference laboratory, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
| | - Zemao Gu
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, People's Republic of China; Hubei Engineering Technology Research Center for Aquatic Animal Diseases Control and Prevention, Wuhan, People's Republic of China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, People's Republic of China; National Aquatic Animal Diseases Para-reference laboratory, Huazhong Agricultural University, Wuhan 430070, People's Republic of China.
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Batueva MDD, Liu XH, Zhang JY, Voronin VN, Naydanov TI, Abasheev RY. A new species of Myxobolus (Cnidaria: Myxosporea: Myxobolidae) from the gibel carp Carassius gibelio (Cypriniformes: Cyprinidae). DISEASES OF AQUATIC ORGANISMS 2023; 153:87-93. [PMID: 36951257 DOI: 10.3354/dao03723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Myxobolus zhaltsanovae n. sp., is described from the gills of gibel carp Carassius gibelio found during a survey of myxozoans from the watershed of Lake Baikal, Russia, based on morphological and molecular characterizations. Plasmodia of M. zhaltsanovae n. sp. develop extravascularly and measure 500-1000 μm long, 25-100 μm wide. The myxospore is circular to oval, measuring 13.23 ± 0.09 (11.3-14.8) µm (mean ± SD, range) in length, 10.19 ± 0.07 (9.1-11.4) µm in width, and 6.49 ± 0.12 (5.4-7.2) µm in thickness. Polar capsules are unequal and subspherical; measurements of polar capsules are: length 5.62 ± 0.06 (4.7-6.7), width 3.44 ± 0.04 (2.4-4.4) µm and length 3.42 ± 0.05 (2.5-4.1), width 1.94 ± 0.04 (1.3-3.3) µm. Phylogenetic analysis with the 18S rDNA gene shows M. zhaltsanovae n. sp. as a sister species of the subclade formed by M. musseliusae, M. tsangwuensis, and M. basilamellaris, which infect common carp Cyprinus carpio.
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McAllister CT, Cloutman DG, Leis EM, Camus AC, Robison HW. A new Myxobolus (Cnidaria: Myxosporea: Myxobolidae) from the gills of the southern striped shiner, Luxilus chrysocephalus isolepis (Cypriniformes: Leuciscidae), from southwestern Arkansas, USA. Syst Parasitol 2023; 100:215-229. [PMID: 36656427 DOI: 10.1007/s11230-023-10082-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/03/2023] [Indexed: 01/20/2023]
Abstract
The southern striped shiner, Luxilus chrysocephalus isolepis (Hubbs & Brown) is a relatively large minnow belonging to the true minnow family Leuciscidae Bonaparte. Between May 2020 and January 2022, 55 L. c. isolepis were collected from watersheds in Montgomery (n = 6), Polk (n = 17) and Sevier (n = 32) counties, Arkansas, USA, and their gills, gallbladders, urinary bladders, fins, integument, other major organs, and musculature were examined for myxozoans. Gills of 11 (34%) individual southern striped shiners from Sevier County were infected with a new myxozoan, Myxobolus carlhubbsi n. sp. A qualitative and quantitative morphological description was based on formalin-fixed preserved myxospores, and molecular data consisted of a 1,970 base pair sequence of the partial small subunit rRNA gene from ethanol-preserved specimens. Histologically, plasmodia filled and expanded interlamellar troughs. Hyperplastic epithelial and goblet cells filled interlamellar troughs adjacent to plasmodia, but inflammatory response was limited to scattered lymphocytes. Phylogenetic analysis revealed that M. carlhubbsi n. sp. is a member of a clade of species with pyriform myxospores parasitizing North American Pogonichthyinae Girard and North American and Eurasian Leuciscinae Bonaparte. This is the first report of a myxozoan from L. c. isolepis. This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as urn:lsid:zoobank.org:pub:D10D71C2-2C75-4A1C-80ED-B98FF36CB509.
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Affiliation(s)
- Chris T McAllister
- Science and Mathematics Division, Eastern Oklahoma State College, Idabel, OK, 74745, USA.
| | | | - Eric M Leis
- La Crosse Fish Health Center-Midwest Fisheries Center, U. S. Fish and Wildlife Service, Onalaska, WI, 54650, USA
| | - Alvin C Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, 30677, USA
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11
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Sellyei B, Molnár K, Czeglédi I, Preiszner B, Székely C. Effect of 80% ethanol or 10% formalin fixation, freezing at −20 °C and staining on Myxobolus (Myxosporea) spores to be deposited in parasitological collections. INTERNATIONAL JOURNAL FOR PARASITOLOGY: PARASITES AND WILDLIFE 2022; 19:257-262. [PMID: 36388723 PMCID: PMC9663741 DOI: 10.1016/j.ijppaw.2022.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 10/19/2022] [Accepted: 10/19/2022] [Indexed: 11/12/2022]
Abstract
The preparation of myxosporeans for the description of myxospores and their preservation as type material in parasitological collections show great variations. Most frequently, formalin and ethanol are used for fixation and Giemsa solution for staining spores. In this work, authors studied the effect of 80% ethanol and 10% formalin fixation, freezing at −20 °C and staining on the size and transparency of two Myxobolus species of cyprinid fishes, M. bramae and M. bliccae spore, and recommended a new method for the deposition of type material to parasitological collections in museums. The studies have commended that fresh spores from mature plasmodia are the best material for measuring the size and studying the inner structures, the number of polar tubules in polar capsules and the morphological characters of the intercapsular appendix. The obtained quantitative data suggest that cryo- and chemical preservation do not have a notable negative effect on spores compared to fresh samples but they decrease the transparency of spores. Staining the spores with Ziehl–Neelsen has proved to be a useful method for studying the fine structure without size reduction, while Giemsa staining induced a shrinkage of spores so it seems to be not ideal for description of a new species. When treating spores of Myxobolus spp. with Lugol's solution, iodinophilous vacuoles in the sporoplasm were not recognised but visualisation of the coils of polar tubules was enhanced. As a type material for newly described species, authors suggest phototypes and spores fixed in 80% ethanol to be deposited into collections, as this preservation method is suitable for subsequent research, such as re-measurements and molecular analysis. The effect of fixation, freezing at −20 C and staining on myxospores was studied. Model materials were myxospores of Myxobolus bramae and M. bliccae. No changes in size were observed on frozen at −20 C and 80% ethanol- or 10% formalin-fixed spores. A shrinkage of spores was noticed when staining spores with Giemsa solution. Phototypes and 80% ethanol-fixed spores are recommended for collections as type material.
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Affiliation(s)
- Boglárka Sellyei
- Veterinary Medical Research Institute, 1143, Budapest, Hungária krt. 21, Hungary
| | - Kálmán Molnár
- Veterinary Medical Research Institute, 1143, Budapest, Hungária krt. 21, Hungary
| | - István Czeglédi
- Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), Tihany, Hungary
| | - Bálint Preiszner
- Balaton Limnological Research Institute, Eötvös Loránd Research Network (ELKH), Tihany, Hungary
| | - Csaba Székely
- Veterinary Medical Research Institute, 1143, Budapest, Hungária krt. 21, Hungary
- Corresponding author.
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McAllister CT, Cloutman DG, Camus AC, Trauth SE, Ray JC, Robison HW, Whipps CM. A New Species of Myxobolus (Cnidaria: Myxosporea: Myxobolidae) from the Fins of the Western Creek Chubsucker, Erimyzon claviformis (Cypriniformes: Catostomidae), from Arkansas. J Parasitol 2022; 108:545-552. [DOI: 10.1645/22-40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Chris T. McAllister
- Science and Mathematics Division, Eastern Oklahoma State College, Idabel, Oklahoma 74745
| | | | - Alvin C. Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, Georgia 30677
| | - Stanley E. Trauth
- Department of Biological Sciences, Arkansas State University, State University, Arkansas 72467
| | - Johnny C. Ray
- Science and Mathematics Division, Eastern Oklahoma State College, Idabel, Oklahoma 74745
| | | | - Christopher M. Whipps
- Environmental Biology, SUNY College of Environmental Science & Forestry, 1 Forestry Drive, Syracuse, New York 13210
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13
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McAllister CT, Cloutman D, Robison HW. Gill Parasites of the Cypress Minnow, Hybognathus hayi Jordan (Cypriniformes: Leuciscidae), in South Arkansas. COMP PARASITOL 2022. [DOI: 10.1654/copa-d-21-00013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chris T. McAllister
- Division of Science and Mathematics, Eastern Oklahoma State College, Idabel, Oklahoma 74745, U.S.A. (e-mail: )
| | | | - Henry W. Robison
- 602 Big Creek Drive, Sherwood, Arkansas 72120, U.S.A. (e-mail: )
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14
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McAllister CT, Cloutman DG, Leis EM, Camus AC, Trauth SE, Woodyard ET, Robison HW. A NEW SPECIES OF MYXOBOLUS (CNIDARIA: MYXOSPOREA: MYXOBOLIDAE) FROM THE GILLS OF CREEK CHUB, SEMOTILUS ATROMACULATUS (CYPRINIFORMES: LEUCISCIDAE: PLAGIOPTERINAE), FROM THE OUACHITA DRAINAGE OF ARKANSAS. J Parasitol 2022; 108:476-486. [PMID: 36269893 DOI: 10.1645/22-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
During October and November 2021, 33 creek chubs, Semotilus atromaculatus, were collected from 3 sites in Polk County, Arkansas (Ouachita River drainage), and their gills, gallbladder, fins, integument, musculature, and other major organs were examined for myxozoans. The gills of 9 (27%) were infected with a new myxozoan, Myxobolus fountainae n. sp. Qualitative and quantitative morphological data were from fresh and formalin-fixed preserved spores, while molecular data consisted of a 1918 base pair sequence of the partial small subunit ribosomal RNA gene. Phylogenetic analysis grouped M. fountainae n. sp. with the other leuciscid-infecting myxobolids from North America and within a larger clade of European myxozoans. In addition, histological information is provided on the infection. A previous record of Myxobolus muelleriBütschli, 1882, from the gills and ureters of S. atromaculatus is considered invalid and represents an unknown species. Myxobolus fountainae n. sp. is the only named myxozoan known to infect the gill filaments of S. atromaculatus, whereas Myxobolus pendula (Guilford, 1967) infects the gill arches.
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Affiliation(s)
- Chris T McAllister
- Science and Mathematics Division, Eastern Oklahoma State College, Idabel, Oklahoma 74745
| | | | - Eric M Leis
- La Crosse Fish Health Center-Midwest Fisheries Center, U.S. Fish and Wildlife Service, Onalaska, Wisconsin 54650
| | - Alvin C Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, Georgia 30677
| | - Stanley E Trauth
- Department of Biological Sciences, Arkansas State University (Emeritus), State University, Arkansas 72467
| | - Ethan T Woodyard
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762
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15
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Morphological and Molecular Characterization of Myxobolus nkondjockei sp. nov. (Myxozoa: Myxobolidae), A Parasite of Labeo batesii Boulenger, 1911 (Teleostei: Cyprinidae) from Makombè River in Cameroon. Acta Parasitol 2022; 67:1573-1583. [PMID: 36018469 DOI: 10.1007/s11686-022-00609-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 08/10/2022] [Indexed: 11/01/2022]
Abstract
PURPOSE Myxozoans are economically important group of metazoan parasites, which can cause diseases in a large variety of commercially important fishes. Increased knowledge on molecular features has shown that traditional descriptive characters may be misleading. Combination of both descriptive and molecular features is therefore necessary for an integrated taxonomic assessment. METHODS Cyprinid Labeo batesii, sampled in the Makombè River at Nkondjock in Cameroon were examined for myxosporeans. Identification of parasite species was based on morphological and molecular sequence analyses of myxospores. Phylogenetic analysis was performed using maximum likelihood (ML) and Bayesian inference (BI) methods. RESULTS The scales of L. batesii were infected by Myxobolus nkondjockei sp. nov Their mature myxospores are ovoid in frontal view and lenticular in lateral view, with two rounded ends. These myxospores measured 10.3 (10-10.9) μm length and 8.0 (7.3-8.5) μm width. Myxospores have two ovoid and equal sizes polar capsules. They measured 4.5 (4.0-5.0) µm in length and 2.4 (2-2.9) µm in width. Polar tubules were coiled in 4-5 turns perpendicular to the longitudinal axis of the polar capsules. Phylogenetic analysis of the 18S rDNA sequence show clustering of M. nkondjockei sp. n. close to an undetermined species Myxobolus sp. reported infecting gill lamellas of Labeo rohita from India. CONCLUSION The morphological, molecular and phylogenetic data provided for M. nkondjockei sp. n. are solid basis for further identification of this myxozoan of which pathogenicity probably plays an economic role at culturing the hosts.
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Chinh NN, Tham NT, Yurakhno VM, Doanh PN, Whipps CM, Shirakashi S. Description of Myxobolus hoabinhensis n. sp. (Myxosporea: Myxobolidae), infecting the trunk muscles of goldfish Carassius auratus (Linnaeus, 1758) (Cypriniformes: Cyprinidae) in northern Vietnam. Parasitol Res 2022; 121:2495-2502. [PMID: 35794283 DOI: 10.1007/s00436-022-07586-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 06/23/2022] [Indexed: 10/17/2022]
Abstract
During a survey of myxosporean parasites of freshwater fishes in northern Vietnam, myxospores resembling those of the genus Myxobolus (Myxosporea: Myxobolidae) were found in the trunk muscle of 6 out of 35 specimens (17.14%) of wild goldfish Carassius auratus (Cypriniformes: Cyprinidae). The mature spores were 12.0 ± 0.4 (11.4 - 12.6) µm long, 8.5 ± 0.2 (7.9 - 9.0) µm wide and 6.1 ± 0.2 (5.8 - 6.3) µm thick, containing two pyriform-shaped polar capsules unequal in size. The larger polar capsule was 7.6 ± 0.3 (7.1 - 8.4) µm long and 3.5 ± 0.1 (3.3 - 3.8) µm wide, and the smaller polar capsule was 6.2 ± 0.3 (5.5 - 6.7) µm long and 2.9 ± 0.2 (2.6 - 3.4) µm wide. Each polar capsule contained a polar filament with 3-5 coils. A phylogenetic analysis based on the small subunit rDNA (SSU rDNA) sequence revealed that this Myxobolus species forms a distinct branch in the phylogenetic tree sister to Myxobolus artus and Myxobolus cyprini, with DNA sequence similarity at 97.6% to M. artus and 97.5% to M. cyprini. A combination of the morphological characteristics and molecular data suggest that this is an undescribed species, and we propose the name Myxobolus hoabinhensis n. sp.
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Affiliation(s)
- Nguyen Ngoc Chinh
- Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet St. Cau Giay Dist., Hanoi, Vietnam.
| | - Nguyen Thi Tham
- Faculty of Environment, Halong University, 258 Bach Dang St., Uong Bi City, Quang Ninh, Vietnam
| | - Violetta M Yurakhno
- A. O. Kovalevsky Institute of Biology of the Southern Seas of Russian Academy of Sciences, 2 Nakhimov Ave, 299011, Sevastopol, Russian Federation
| | - Pham Ngoc Doanh
- Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet St. Cau Giay Dist., Hanoi, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet St. Cau Giay Dist., Hanoi, Vietnam
| | - Christopher M Whipps
- SUNY-ESF, State University of New York College of Environmental Science and Forestry, Department of Environmental Biology, 1 Forestry Drive, NY, 13210, Syracuse, USA
| | - Sho Shirakashi
- Aquaculture Research Institute, Kindai University, 3153 Shirahama, Nishimuro, Wakayama, 649-2211, Japan
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Vieira DHMD, Agostinho BN, Negrelli DC, da Silva RJ, de Azevedo RK, Abdallah VD. Taxonomy and Systematics of Two New Species of Myxobolus (Cnidaria: Myxobolidae) Parasitizing the Gills of Mugil curema (Mugilidae) from the Brazilian Coast. Acta Parasitol 2022; 67:1206-1216. [PMID: 35593955 DOI: 10.1007/s11686-022-00569-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 04/29/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE We describe two new species of Myxobolus (Myxobolidae) found parasitizing Mugil curema from two locations in Brazil: Myxobolus curemae n. sp. from gill arch and rays and Myxobolus maceioensis n. sp. from gill lamellae. METHODS We based the descriptions on myxospore morphology, histology, and small-subunit ribosomal DNA sequences. RESULTS Myxospores of the two new species had similar morphology and morphometry but differed in spore body width and length, and ssrDNA sequences differed by 10.5%. These data supported the diagnosis of the parasites as distinct and novel species. The phylogenetic analysis showed a subclade formed by species that parasitize Mugiliformes, with M. maceioensis n. sp. as a sister species of Myxobolus episquamalis and Myxobolus bizerti, while there is a group of six species that are sister related to M. curemae n. sp. Our analysis was consistent with previous studies suggesting that orders of the hosts are strongly correlated with phylogenetic signals in the Myxobolidae. CONCLUSIONS Myxobolus curemae n. sp. and M. maceioensis n. sp. are new species identified parasitizing M. curema.
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Affiliation(s)
| | - Beatriz Narciso Agostinho
- Division of Parasitology, Institute of Biosciences, São Paulo State University (Unesp), Botucatu, SP, 18618-689, Brazil
| | - Débora Caroline Negrelli
- Division of Parasitology, Institute of Biosciences, São Paulo State University (Unesp), Botucatu, SP, 18618-689, Brazil
| | - Reinaldo José da Silva
- Division of Parasitology, Institute of Biosciences, São Paulo State University (Unesp), Botucatu, SP, 18618-689, Brazil
| | | | - Vanessa Doro Abdallah
- Análise de Sistemas Ambientais, Centro Universitário CESMAC, Maceió, AL, Brazil
- Instituto de Ciências Biológicas E da Saúde, Setor de Parasitologia e Patologia, Universidade Federal de Alagoas, Maceió, AL, 57072-970, Brasil
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Two novel species of Myxobolus parasitizing the gills of Semaprochilodus insignis in the Brazilian Amazon. Microb Pathog 2022; 165:105464. [PMID: 35247498 DOI: 10.1016/j.micpath.2022.105464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 02/18/2022] [Accepted: 02/28/2022] [Indexed: 11/23/2022]
Abstract
The present study describes two new Myxobolus species infecting the gills of Semaprochilodus insignis, the most consumed freshwater fish species in the Brazilian Amazon. The fish specimens were caught in the Tapajós River, in the state of Pará, and the morphological, ultrastructural, small subunit ribosomal DNA (ssrDNA), and phylogenetic data of the myxosporean species were obtained. Two species of Myxobolus were found in the gills of S. insignis. Myxobolus maiai n. sp. developed in the gill filaments, and mature myxospores were round-shaped from the frontal view, measuring 12.5-14.8 (13.9 ± 0.5) μm in length, 11.4-13.8 (12.3 ± 0.5) μm in width, and have a thickness of 6.4-7.7 (6.9 ± 0.6) μm in the lateral view, with symmetric values. Its polar capsules were 4.4-6.6 (5.5 ± 0.5) μm in length and 2.3-3.7 (3.0 ± 0.3) μm in width, and the polar tubules had 4 - 5 coils. Myxobolus iarakiensis n. sp. was found infecting the gill arch. Mature myxospores were oval-shaped from the frontal view, and measured 6.7-8.6 (8.0 ± 0.4) μm in length, 4.5-6.3 (5.6 ± 0.4) μm in width, and had a thickness of 2.7-4.7 (3.8 ± 0.5) μm in the lateral view, with symmetric values. Its polar capsules were 2.1-3.7 (2.9 ± 0.3) μm in length and 1.1-2.0 (1.5 ± 0.2) μm in width, and its polar tubules had 4 - 5 coils. The ssrDNA based phylogeny showed these two novel species as grouping in a clade composed of parasite species of Prochilodontidae hosts.
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19
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Fariya N, Kaur H, Singh M, Abidi R, El-Matbouli M, Kumar G. Morphological and Molecular Characterization of a New Myxozoan, Myxobolus grassi sp. nov. (Myxosporea), Infecting the Grass Carp, Ctenopharyngodon idella in the Gomti River, India. Pathogens 2022; 11:pathogens11030303. [PMID: 35335627 PMCID: PMC8956116 DOI: 10.3390/pathogens11030303] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 02/23/2022] [Accepted: 02/24/2022] [Indexed: 02/06/2023] Open
Abstract
Myxosporeans are well-known parasites infecting food fishes in fresh and marine water around the globe. Grass carp (Ctenopharyngodon idella), a freshwater food fish commonly cultured in India with has significant economic importance. Herein, the study focuses on the description of a new myxosporean species, Myxobolus grassi sp. nov. from the gills as primary site and liver as secondary site of infection in grass carp. Both organs (gill and liver) were infected concurrently in the host and the prevalence of grass carp infection was 4.05% in gill filaments and liver, respectively. Identification of species was based on the morphological and morphometric features of the myxospore as well as 18S rDNA sequence data. A smear from gill and liver exhibited hundreds of morphologically similar myxospores. BLAST search revealed 98% sequence similarity and 0.03 genetic distance with M. catlae (KM029967) infecting gill lamellae of mrigal carp (Cirrhinus cirrhosus) from India and 98–84% sequence similarity with other myxobolids in India, China, Japan, Malaysia, Turkey and Hungary. Phylogenetically, it clustered with other myxobolids infecting gills and related organs (i.e., vital organ) of Indian cyprinid carp species. On the basis of myxospore morphology and 18S sequence, we propose M. grassi sp. nov.
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Affiliation(s)
- Naireen Fariya
- Parasitology Laboratory, Fish Health Management Division, National Bureau of Fish Genetic Resources, Lucknow 226002, India; (N.F.); (R.A.)
| | - Harpreet Kaur
- Department of Zoology, Panjab University, Chandigarh 160014, India;
| | - Mahender Singh
- DNA Barcoding Laboratory, Molecular Biology & Biotechnology Division, National Bureau of Fish Genetic Resources, Lucknow 226002, India;
| | - Rehana Abidi
- Parasitology Laboratory, Fish Health Management Division, National Bureau of Fish Genetic Resources, Lucknow 226002, India; (N.F.); (R.A.)
| | - Mansour El-Matbouli
- Clinical Division of Fish Medicine, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria;
| | - Gokhlesh Kumar
- Clinical Division of Fish Medicine, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria;
- Correspondence:
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20
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Zago AC, Vieira DHMD, Franceschini L, da Silva RJ. Morphological, ultrastructural, and molecular analysis of a new species of Myxobolus (Cnidaria, Myxosporea) parasitizing Apareiodon piracicabae (Characiformes, Parodontidae) from Brazil. Parasitol Int 2022; 88:102556. [DOI: 10.1016/j.parint.2022.102556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/31/2022] [Accepted: 02/02/2022] [Indexed: 11/27/2022]
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21
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Batueva MDD, Burdukovskaya TG. Supplementary studies on Myxobolus talievi Dogiel, 1957 (Cnidaria, Myxozoa) from the skeletal muscle of the cottoid fish Cyphocottus eurystomus in Lake Baikal: Morphological, histological and molecular characterisations. Acta Vet Hung 2022. [PMID: 35089163 DOI: 10.1556/004.2021.00054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/06/2021] [Indexed: 11/19/2022]
Abstract
Myxobolus talievi Dogiel, 1957 was originally described from the eyes, skeletal muscles and body cavity of endemic cottoid fish from Lake Baikal. In the present study, we supply new information on the myxospore morphology and histopathology of M. talievi; furthermore, we complete the original species description by Dogiel and Bogolepova (1957) with 18S ribosomal DNA (rDNA) sequence data. Histopathological analysis showed that the plasmodium was encapsulated by a thin layer of connective tissue and located in the intermuscular connective tissue among muscle cells. No inflammation was observed. Phylogenetic analysis revealed that M. talievi clustered with Myxobolus sp. 2 (NCBI Acc. No. U13830), an unidentified Myxobolus species from cottoid fish studied by Smothers et al. (1994), and located in the sister clade of Myxobolus spp. developing spores in the nerves of salmonids.
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Correya MS, Vijayagopal P, Sanil NK. Morphological and molecular description of a new species of Myxobolus (Myxosporea: Myxobolidae) infecting Planiliza macrolepis (Smith, 1846) from India. J Parasit Dis 2021; 45:887-896. [PMID: 34789969 DOI: 10.1007/s12639-021-01376-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 03/05/2021] [Indexed: 11/28/2022] Open
Abstract
The present paper describes a novel species of Myxobolus parasitizing the gill filaments of the largescale mullet, Planiliza macrolepis from Cochin backwaters, Kerala, India. The parasite develops in the gill filaments; plasmodia elongated, milky white, measured 1.37-2.18 (1.78 ± 0.35) mm × 0.07-0.12 (0.10 ± 0.02) mm in size. Mature myxospores ovoid in valvular view, biconvex in sutural view with smooth shell valves and measured 6.24-7.02 (6.63 ± 0.23) × 5.01-6.18 (5.68 ± 0.25) μm in size. Polar capsules equal, oval with pointed anterior ends, 3.07-3.58 (3.33 ± 0.12) × 1.68-2.42 (2.09 ± 0.18) μm in size. Polar filaments with 4 coils, measured 29.61 ± 4.75 μm in length when extruded. Sporoplasm binucleate with a rudimentary nucleus and a vacuole. A comparison with related Myxobolus species revealed significant morphological and morphometric differences. In BLASTN and genetic distance analysis, the present parasite showed high divergence with other myxosporean sequences, indicating its molecular uniqueness. In Maximum Likelihood and Bayesian Inference analysis, the present species stands out with M. ramadus as sister branch within the Myxobolus clade. In infected gill filaments, the plasmodia caused swelling/deformation, compression of lamellae and reduction in respiratory surface area. Three of 222 P. macrolepis screened were infected, indicating a prevalence of 1.3%. Considering the morphological, morphometric, molecular and phylogenetic differences with the previously described species of myxosporeans, along with the dissimilarities in host and geographical locations, the present parasite is treated as a new species and the name Myxobolus cochinensis n. sp. is proposed.
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Affiliation(s)
- Mary Soniya Correya
- Fish Health Section, Marine Biotechnology Division, Central Marine Fisheries Research Institute, Cochin, Kerala 682018 India
| | - P Vijayagopal
- Fish Health Section, Marine Biotechnology Division, Central Marine Fisheries Research Institute, Cochin, Kerala 682018 India
| | - N K Sanil
- Fish Health Section, Marine Biotechnology Division, Central Marine Fisheries Research Institute, Cochin, Kerala 682018 India
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23
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Ksepka SP, Bullard SA. Two new species of Myxobolus Bütschli, 1882 (Cnidaria: Bivalvulida: Myxobolidae) infecting the gill of the black redhorse, Moxostoma duquesnei (Lesueur) (Cypriniformes: Catostomidae) in the Little Tennessee River Basin, North Carolina. Syst Parasitol 2021; 98:713-730. [PMID: 34677735 DOI: 10.1007/s11230-021-10007-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/06/2021] [Indexed: 10/20/2022]
Abstract
Two new species of Myxobolus Bütschli, 1882 (Bivalvulida: Myxobolidae) are described from the gill of the black redhorse (Moxostoma duquesnei [Leueur][Cypriniformes: Catostomidae]) from the Little Tennessee River Basin, North Carolina, United States. Myxobolus branchiofilum n. sp. infects lumen of the lamellar arterioles and Myxobolus branchiopecten n. sp. infects the bone and cartilage at the tip of the gill rakers. They differ from all congeners by a combination of myxospore dimensions and the presence or absence of an iodinophilic vacuole in the sporoplasm, mucous envelope, intercapsular process, and sutural markings. A phylogenetic analysis of the small subunit ribosomal DNA recovered M. branchiopectin sister to Myxobolus sp. (AF378343) in a clade composed of 6 species of Myxobolus, which infect predominately cypriniform intermediate hosts. Myxobolus branchiofilum was recovered sister to Myxobolus ictiobus Rosser, Griffin, Quiniou, Alberson, Woodyard, Mischker, Greenway, Wise & Pote, 2016 in a clade composed of 8 species of Myxobolus, which predominately infect catostomid intermediate hosts. Histological sections of infected gill revealed intra-lamellar plasmodia of M. branchiofilum in the lumen of the lamellar arterioles and foci of M. branchiopecten developing in the bone and cartilage of the gill raker tip. These are the first myxozoans reported from the black redhorse. Given that these two new species are morphologically congeneric but recovered in distantly related clades, we discuss the persistent issue of myxobolid genera paraphyly/polyphyly.
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Affiliation(s)
- Steven P Ksepka
- Aquatic Parasitology Laboratory, School of Fisheries, Aquaculture, & Aquatic Sciences, College of Agriculture, Auburn University, 203 Swingle Hall, Auburn, AL, 36849, USA.
| | - Stephen A Bullard
- Aquatic Parasitology Laboratory, School of Fisheries, Aquaculture, & Aquatic Sciences, College of Agriculture, Auburn University, 203 Swingle Hall, Auburn, AL, 36849, USA
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24
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McAllister CT, Woodyard ET, Stilwell JM, Rosser TG, Fayton TJ, Camus AJ, Griffin MJ, Robison HW. A NEW SPECIES OF MYXOBOLUS (CNIDARIA: MYXOSPOREA: MYXOBOLIDAE) FROM THE BLUE SUCKER, CYCLEPTUS ELONGATUS (LESUEUR) (CYPRINIFORMES: CATOSTOMIDAE: CYCLEPTINAE), FROM ARKANSAS. J Parasitol 2021; 107:582-592. [PMID: 34314485 DOI: 10.1645/20-125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
During 9-10 February 2018 and 21-22 February 2020, 7 adult Blue Suckers, Cycleptus elongatus, were collected by hoop nets from the Red River, Little River County (n = 3), and the Black River, Lawrence County (n = 4), Arkansas, and their gills, gallbladders, fins, integument, other major organs, and musculature were examined for myxozoans. All 7 (100%) were infected with an unknown species of gill-infecting Myxobolus sp. Twenty formalin-fixed plasmodia (cysts) of Myxobolus cloutmani n. sp. were elliptoidal, 407 μm long × 270 μm wide. Formalin-fixed myxospores were orbicular to broadly elliptoidal, 8.7 μm long × 7.8 μm wide. Two polar capsules were pyriform and subequal in size, extending over halfway in the myxospore. The larger polar capsule was 5.5 μm long × 3.1 μm wide, while the shorter was 5.1 × 2.9 μm. A coiled polar filament possessed 5 or 6 coils. The myxospore was 3.7 μm thick in sutural view, with a distinct sutural ridge. Qualitative and quantitative morphological data were from formalin-fixed as well as ethanol-preserved spores, while molecular data consisted of a 2,010 base pair sequence of the partial 18S ribosomal RNA gene and a 2,502 base pair sequence of the partial 28S ribosomal RNA gene. Phylogenetic analysis grouped M. cloutmani n. sp. with the other catostomid-infecting myxobolids. This is the first myxozoan reported from C. elongatus.
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Affiliation(s)
- Chris T McAllister
- Science and Mathematics Division, Eastern Oklahoma State College, Idabel, Oklahoma 74745
| | - Ethan T Woodyard
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762
| | - Justin M Stilwell
- Department of Pathology, University of Georgia, Athens, Georgia 30602
| | - Thomas G Rosser
- Department of Comparative Biomedical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762
| | - Thomas J Fayton
- Department of Microbiology and Immunology, Cornell University, Ithaca, New York 14853
| | - Alvin J Camus
- Department of Pathology, University of Georgia, Athens, Georgia 30602
| | - Matt J Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762
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25
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Székely C, Ghosh S, Borzák R, Goswami U, Molnár K, Cech G. The occurrence of known Myxobolus and Thelohanellus species (Myxozoa, Myxosporea) from Indian major carps with the description of Myxobolus bandyopadhyayi n. sp. in West Bengal. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2021; 16:18-25. [PMID: 34381686 PMCID: PMC8334371 DOI: 10.1016/j.ijppaw.2021.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 11/29/2022]
Abstract
Myxosporean infection of Indian major carps (rohu, Labeo rohita; catla, Gibelion catla; mrigal, Cirrhinus mrigala) was examined from two fish farms and two fish markets in West Bengal, India. One Thelohanellus and four Myxobolus species were detected from the fins and scales of the investigated species. Comprehensive morphological and molecular biological studies revealed four already known species, Thelohanellus caudatus from the fins of rohu, Myxobolus dermiscalis from the scales of rohu, Myxobolus chakravartyi from the fins of catla, and Myxobolus rewensis from the fins of mrigal. This study complemented the species description of M. chakravartyi and M. rewensis with the missing molecular data. Moreover, based on morphometrics and ssrDNA sequence data, a new species was documented from the scales of rohu, and named Myxobolus bandyopadhyayi n. sp. Myxozoan infections were recognised from Indian major carps in West Bengal, India. A new Myxobolus species was discovered from the scales of rohu: Myxobolus bandiopadhyayi n. sp. Redescription of four known Indian Myxobolus and Thelohanellus spp. The first molecular data were obtained on Myxobolus chakravartyi and Myxobolus rewensis. ssrDNA was used to support the morphological identification of taxa.
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Affiliation(s)
- Csaba Székely
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Budapest, Hungary
| | - Subarna Ghosh
- Serampore College, Serampore, Hooghly, West Bengal, India
| | - Réka Borzák
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Budapest, Hungary
| | - Urvashi Goswami
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Budapest, Hungary
| | - Kálmán Molnár
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Budapest, Hungary
| | - Gábor Cech
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Budapest, Hungary
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26
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Mathews PD, Bonillo C, Rabet N, Lord C, Causse R, Keith P, Audebert F. Phylogenetic analysis and characterization of a new parasitic cnidarian (Myxosporea: Myxobolidae) parasitizing skin of the giant mottled eel from the Solomon Islands. INFECTION GENETICS AND EVOLUTION 2021; 94:104986. [PMID: 34246799 DOI: 10.1016/j.meegid.2021.104986] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/22/2021] [Accepted: 06/27/2021] [Indexed: 11/28/2022]
Abstract
Myxosporeans are microscopic cnidarians associated with severe diseases in aquaculture and wild fish populations. This group of parasitic cnidarians thus warrants close attention concerning its potential impact on susceptible fish stocks. At present, little is known about this group of parasites infecting anguillid eels. From myxospore specimens collected from a freshwater eel (Anguilla marmorata) in the Solomon Islands, we describe a new species belonging to the genus Myxobolus based on an integrative taxonomic analysis of morphological, biological traits and molecular data. Furthermore, we determined the phylogenetic position and relationships of this species among other platysporine myxosporeans. Molecular phylogenetic assessment of small subunit ribosomal DNA showed that the species clusters together with Myxobolus portucalensis and Echinactinomyxon type 5 Özer, Wootten and Shinn, 2002, in a well-supported subclade. This is the first report of a myxosporean parasite infecting fish from the Solomon Islands.
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Affiliation(s)
- Patrick D Mathews
- Unité Biologie des Organismes et Écosystèmes Aquatiques-BOREA, Sorbonne Université, Museum National d'Histoire Naturelle, SU, MNHN, CNRS, IRD, UCN, UA, CP 26, 43 rue cuvier, 75005 Paris, France; Department of Zoology, Institute of Biosciences, University of São Paulo, 05508-090 São Paulo, Brazil.
| | - Céline Bonillo
- Unité Biologie des Organismes et Écosystèmes Aquatiques-BOREA, Sorbonne Université, Museum National d'Histoire Naturelle, SU, MNHN, CNRS, IRD, UCN, UA, CP 26, 43 rue cuvier, 75005 Paris, France
| | - Nicolas Rabet
- Unité Biologie des Organismes et Écosystèmes Aquatiques-BOREA, Sorbonne Université, Museum National d'Histoire Naturelle, SU, MNHN, CNRS, IRD, UCN, UA, CP 26, 43 rue cuvier, 75005 Paris, France
| | - Clara Lord
- Unité Biologie des Organismes et Écosystèmes Aquatiques-BOREA, Sorbonne Université, Museum National d'Histoire Naturelle, SU, MNHN, CNRS, IRD, UCN, UA, CP 26, 43 rue cuvier, 75005 Paris, France
| | - Romain Causse
- Unité Biologie des Organismes et Écosystèmes Aquatiques-BOREA, Sorbonne Université, Museum National d'Histoire Naturelle, SU, MNHN, CNRS, IRD, UCN, UA, CP 26, 43 rue cuvier, 75005 Paris, France
| | - Philippe Keith
- Unité Biologie des Organismes et Écosystèmes Aquatiques-BOREA, Sorbonne Université, Museum National d'Histoire Naturelle, SU, MNHN, CNRS, IRD, UCN, UA, CP 26, 43 rue cuvier, 75005 Paris, France
| | - Fabienne Audebert
- Unité Biologie des Organismes et Écosystèmes Aquatiques-BOREA, Sorbonne Université, Museum National d'Histoire Naturelle, SU, MNHN, CNRS, IRD, UCN, UA, CP 26, 43 rue cuvier, 75005 Paris, France
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27
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McAllister CT, Choudhury A, Fayton TJ, Cloutman DG, Bursey CR, Robison HW, Whipps CM, Scholz T. Parasites of Western Creek Chubsucker Erimyzon claviformis (Cypriniformes: Catostomidae) from Arkansas and Oklahoma, U.S.A. COMP PARASITOL 2021. [DOI: 10.1654/copa-d-20-00013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chris T. McAllister
- Division of Science and Mathematics, Eastern Oklahoma State College, Idabel, Oklahoma 74745, U.S.A. (e-mail: )
| | - Anindo Choudhury
- Division of Natural Sciences, St. Norbert College, 100 Grant Street, DePere, Wisconsin 54115, U.S.A. (e-mail: )
| | - Thomas J. Fayton
- Department of Microbiology and Immunology, Cornell University, Ithaca, New York 14853, U.S.A. (e-mail: )
| | | | - Charles R. Bursey
- Department of Biology, The Pennsylvania State University, Shenango Campus, Sharon, Pennsylvania 16146, U.S.A.(e-mail: )
| | - Henry W. Robison
- 9717 Wild Mountain Drive, Sherwood, Arkansas 72120, U.S.A. (e-mail: )
| | - Christopher M. Whipps
- Environmental and Forest Biology, SUNY College of Environmental Science & Forestry, 1 Forestry Drive, Syracuse, New York 13210, U.S.A. (e-mail: )
| | - Tomáš Scholz
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, České Budéjovice, 370 05 Czech Republic (e-mail: )
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28
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Mansour L, Abdel-Haleem HM, Atwa M, Darwish AB, Al-Quraishy S, Abdel-Baki AAS. A new myxozoan parasite, Myxobolus allami sp. n. (Myxozoa: Myxobolidae) from the intestinal wall of Sparidentex hasta (Valenciennes) in Arabian Gulf. Folia Parasitol (Praha) 2021; 68. [PMID: 34232126 DOI: 10.14411/fp.2021.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 02/07/2021] [Indexed: 11/19/2022]
Abstract
Myxobolus allami sp. n. is described from the intestinal wall of the silvery black porgy, Sparidentex hasta (Valenciennes), off Saudi Arabian coast of Arabian Gulf. Two of 20 examined fish were found to be infected with irregular-shaped plasmodia 3-8 mm long × 2-3 mm wide. Mature myxospores are subspherical to elliptical in the valvular view and oval in the sutural view, and are 11-13 (12) µm long, 7-8 (7.5) µm wide and 10-12 (10.8) µm thick. Spores have relatively thin valves and mostly (~ 72%) end with short caudal appendages of ~3 µm long. The spores also have two polar capsules, which are oval to elliptical and measure 5-7 (5.7) µm in length and 2-3 (2.7) µm in width. Polar filaments are coiled, with three turns. Transmission electron microscopy revealed that caudal appendages originated from the sutural edge at the posterior pole of the myxospore with density similar to that of its valves. The SSU rRNAgene sequence of the present species does not match any available sequences in GenBank. Phylogenetically, this species is sister to Myxobolus khaliji Zhang, Al-Qurausihy et Abdel-Baki, 2014 within a well-supported clade of Myxobolus-Henneguya with species infecting marine fishes. The combination of molecular data and morphological differences between this and other species of Myxobolus Bütschli, 1882 lead us to propose that the present form be established as a new species, M. allami. The present study also provides more evidence for the idea that caudal appendages cannot be reliably used to distinguish the species of the genera Myxobolus and Henneguya Thélohan, 1892.
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Affiliation(s)
- Lamjed Mansour
- Zoology Department, College of Science, King Saud University, Saudi Arabia, Riyadh, Saudi Arabia.,Laboratory of Biodiversity, Parasitology and Ecology of Aquatic Systems, Department of Biology, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Heba M Abdel-Haleem
- Zoology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - Marwa Atwa
- Zoology Department, Faculty of Science, Fayoum University, Egypt
| | - Ahmed B Darwish
- Zoology Department, Faculty of Science, Suez University, Egypt
| | - Saleh Al-Quraishy
- Laboratory of Biodiversity, Parasitology and Ecology of Aquatic Systems, Department of Biology, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
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29
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Couso-Pérez S, Rangel LF, Santos MJ, Ares-Mazás E, Gómez-Couso H. Morphological and molecular characterization of a novel Myxobolus species from the gastrointestinal tract of brown trout (Salmo trutta) in Spain. Parasitol Res 2021; 120:2469-2478. [PMID: 34152468 DOI: 10.1007/s00436-021-07201-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 05/27/2021] [Indexed: 11/28/2022]
Abstract
The genus Myxobolus Bütschli, 1882 is the largest group within the class Myxosporea and includes 905 nominal species, 18 of which have been found to infect fish belonging to the family Salmonidae. In the present study, microscopic analysis enabled detection of myxospores in 43 of 613 (7.0%) gastrointestinal tracts from brown trout (Salmo trutta) captured in several rivers in the northwest of the Iberian Peninsula. Measurement of the whole myxospores, polar capsules and other morphological characteristics, together with identification of the site of infection, has led us to propose a novel salmonid-myxobolid species, Myxobolus compostellanus n. sp. Molecular analysis of the small subunit ribosomal RNA (SSU-rRNA) gene yielded the same consensus sequence of 2039 bp in 14 fish specimens. A BLAST search indicated 97.6% similarity to Myxobolus neurobius. Phylogenetic analysis revealed that M. compostellanus n. sp. is clustered with other salmonid-infecting myxobolids. The present findings contribute to the existing knowledge about the genus Myxobolus, providing both morphological and molecular data on a novel species of Myxobolus found to infect the gastrointestinal tract of salmonids, M. compostellanus n. sp. in the brown trout (S. trutta).
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Affiliation(s)
- Seila Couso-Pérez
- Laboratory of Parasitology, Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782, Santiago de Compostela, A Coruña, Spain
| | - Luis F Rangel
- Laboratory of Animal Pathology, Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal.,Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Maria J Santos
- Laboratory of Animal Pathology, Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal.,Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - Elvira Ares-Mazás
- Laboratory of Parasitology, Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782, Santiago de Compostela, A Coruña, Spain
| | - Hipólito Gómez-Couso
- Laboratory of Parasitology, Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782, Santiago de Compostela, A Coruña, Spain. .,Institute of Research on Chemical and Biological Analysis, University of Santiago de Compostela, 15782, Santiago de Compostela, A Coruña, Spain.
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30
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Eiras JC, Cruz CF, Saraiva A, Adriano EA. Synopsis of the species of Myxobolus (Cnidaria, Myxozoa, Myxosporea) described between 2014 and 2020. Folia Parasitol (Praha) 2021; 68. [PMID: 34152289 DOI: 10.14411/fp.2021.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 02/17/2021] [Indexed: 12/17/2022]
Abstract
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.
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Affiliation(s)
- Jorge C Eiras
- Departamento de Biologia, Faculdade de Ciencias, Universidade do Porto, Porto, Portugal.,CIIMAR - Centro Interdisciplinar de Investigacao Marinha e Ambiental, Matosinhos, Portugal
| | - Cristina F Cruz
- Departamento de Biologia, Faculdade de Ciencias, Universidade do Porto, Porto, Portugal.,CIIMAR - Centro Interdisciplinar de Investigacao Marinha e Ambiental, Matosinhos, Portugal
| | - Aurelia Saraiva
- Departamento de Biologia, Faculdade de Ciencias, Universidade do Porto, Porto, Portugal.,CIIMAR - Centro Interdisciplinar de Investigacao Marinha e Ambiental, Matosinhos, Portugal
| | - Edson A Adriano
- Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de Sao Paulo - UNIFESP, Diadema, SP, Brazil
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31
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Pekmezci GZ, Atkinson SD, Yardimci B, Bolukbas CS, Ozpicak M, Yilmaz S. Novel and known myxobolids (Cnidaria, Myxozoa) infecting Chondrostoma angorense (Cypriniformes: Leuciscidae) in Turkey. Parasitol Int 2021; 83:102339. [PMID: 33798741 DOI: 10.1016/j.parint.2021.102339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/24/2021] [Accepted: 03/27/2021] [Indexed: 11/16/2022]
Abstract
Turkey has more than 200 endemic freshwater fish species, one of which is the Ankara nase, Chondrostoma angorense Elvira, 1987 (Cypriniformes: Leuciscidae), a food fish in northern Turkey. Like most endemic fish species in Turkey, its myxosporean parasite fauna (Cnidaria: Myxosporea) are not yet described. We surveyed twenty C. angorense from Lâdik Lake in northern Turkey, and identified two myxosporean parasites from gills of these fish: Myxobolus arrabonensis Cech, Borzák, Molnár, Székely, 2015, and a co-infection of a novel species, Myxobolus polati sp. nov. We characterized both infections based on myxospore morphology, morphometry, tissue tropism, small subunit ribosomal DNA sequence and phylogenetic analysis. Plasmodia of both species were observed in gills, but had distinct tropism: M. arrabonensis is an intrafilamental vascular type, and M. polati sp. nov. is an intralamellar vascular type. We identified M. arrabonensis on the basis of myxospore characters and 100% similarity to the type DNA sequence from the closely-related host C. nasus. The small subunit ribosomal DNA sequence of M. polati sp. nov. (1946 base pairs; GenBank Accession number MH392318) had a maximum similarity of 98% with any Myxobolus sp. from other Eurasian cypriniforms. Phylogenetic analysis revealed that M. polati sp. nov. is most closely related to gill-infecting Myxobolus diversicapsularis from Rutilus rutilus (L.). The present study is the first record of myxosporean species infecting C. angorense comprising a novel species, M. polati sp. nov. and a known species M. arrabonensis.
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Affiliation(s)
- Gokmen Zafer Pekmezci
- Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Ondokuz Mayıs University, 55139 Samsun, Turkey.
| | | | - Banu Yardimci
- Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Ondokuz Mayıs University, 55139 Samsun, Turkey
| | - Cenk Soner Bolukbas
- Department of Parasitology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, 55139 Samsun, Turkey
| | - Melek Ozpicak
- Department of Biology, Faculty of Arts and Science, Ondokuz Mayıs University, 55139 Samsun, Turkey
| | - Savas Yilmaz
- Department of Biology, Faculty of Arts and Science, Ondokuz Mayıs University, 55139 Samsun, Turkey
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32
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Xiang Y, Zhang J, Zhao Y. Molecular data and phylogenetic analysis of Myxobolus pseudonobilis n. sp. infecting the gill filaments of silver carp, Hypophthalmichthys molitrix Valenciennes, 1844. Parasitol Int 2021; 83:102314. [PMID: 33731301 DOI: 10.1016/j.parint.2021.102314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 02/21/2021] [Accepted: 02/23/2021] [Indexed: 11/26/2022]
Abstract
In the present study, we combined morphological and phylogenetic methods to characterize Myxobolus pseudonobilis n. sp. infecting Hypophthalmichthys molitrix Valenciennes, 1844 from Chongqing, China. The morphology and molecular characteristics of M. pseudonobilis n. sp. were distinct from those of other previously described Myxobolus species. Mature myxospores were ovoid in frontal view with spore dimensions of 10.0 ± 0.4 (9.3-10.9) μm in length and 8.5 ± 0.2 (7.9-9.0) μm in width. Two polar capsules occupying approximately half of the myxospore length were unequal in size. The larger polar capsule containing 6 to 7 filament coils measured 5.2 ± 0.3 (4.5-5.8) μm in length and 3.6 ± 0.2 (3.2-3.9) μm in width, while the smaller capsule with 4 to 5 filament coils measured 3.9 ± 0.3 (3.0-4.4) μm in length and 2.5 ± 0.3 (2.1-3.6) μm in width. The comparison of molecular characteristics demonstrated similarities and genetic distances of 18S rDNA sequences of 95.19% - 98.20% and 1.82% - 5.46%, respectively, between M. pseudonobilis n. sp. and its morphologically similar species, and secondary structures were also distinctly different. Moreover, phylogenetic analysis showed that M. pseudonobilis n. sp. was clustered with other myxobolids possessing spores with a blunt anterior end and branched independently. In addition, the morphology of myxosporeans as an important indicator was discussed.
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Affiliation(s)
- Yao Xiang
- Chongqing Key Laboratory of Animal Biology, College of Life Science, Chongqing Normal University, Chongqing 401331, People's Republic of China
| | - Jinye Zhang
- Chongqing Key Laboratory of Animal Biology, College of Life Science, Chongqing Normal University, Chongqing 401331, People's Republic of China.
| | - Yuanjun Zhao
- Chongqing Key Laboratory of Animal Biology, College of Life Science, Chongqing Normal University, Chongqing 401331, People's Republic of China.
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33
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Zafer Pekmezci G, Yardimci B, Soner Bolukbas C, Yilmaz S, Polat N. Four novel Myxobolus species (Cnidaria: Myxozoa) infecting Anatolian khramulya Capoeta tinca (Cyprinidae) in northern Turkey. DISEASES OF AQUATIC ORGANISMS 2021; 144:41-54. [PMID: 33704091 DOI: 10.3354/dao03573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We identified Myxobolus anatolicus Pekmezci, Yardimci, Yilmaz & Polat, 2014 and 4 novel Myxobolus species from the Anatolian khramulya Capoeta tinca (Cyprinidae) in northern Turkey based on morphology, histology, and phylogenetic analysis. M. karaeri sp. nov. plasmodia were observed in the skin doublets between fin rays, the surfaces of the operculum, the gill arch membrane, and in the skin of the fin base. M. samsunensis sp. nov. plasmodia were observed in epithelial tissue inside and on the surface and midline of the gill filaments. M. cakmaki sp. nov. presented as a typical vascular species, which develops in large plasmodia at the end of the gill filaments. The chondrophilic M. ekingeni sp. nov. was detected by histology inside the cartilaginous gill arch and the cartilaginous gill rays of the filaments. Phylogenetic analysis of small subunit ribosomal DNA sequences revealed that M. karaeri sp. nov. and M. samsunensis sp. nov. were clustered with Myxobolus species that infect gills, scales, and fins of cyprinids. M. cakmaki sp. nov. grouped with Myxobolus species that exclusively infect the gills of cyprinids. No molecular data were available for M. ekingeni sp. nov.
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Affiliation(s)
- Gokmen Zafer Pekmezci
- Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Ondokuz Mayıs University, 55139 Samsun, Turkey
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34
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Silva JMA, Adriano EA, Vieira LJ, Naldoni J, Santos FGA. The Amazonian fish Colossoma macropomum harbors high myxosporean diversity: A description of three novel species from a fish farm. Microb Pathog 2021; 153:104808. [PMID: 33636322 DOI: 10.1016/j.micpath.2021.104808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 02/12/2021] [Accepted: 02/12/2021] [Indexed: 11/19/2022]
Abstract
The farming of Colossoma macropomum has intensified in recent years, leading to an increased need for research into the health of the fish. We therefore investigated the diversity of myxosporeans (Cnidaria: Myxozoa) infecting C. macropomum in a breeding system in the municipality of Rio Branco, in the state of Acre, Brazil. Twenty-four fish specimens were examined from June to August 2018. Our results revealed a high prevalence of infection, with 23 specimens (95.8%) exhibiting myxosporean plasmodia. Morphological analysis, based on light and electron microscopies, and molecular analysis (small subunit ribosomal DNA [SSU rDNA] sequencing) revealed the occurrence of three novel species of the genus Myxobolus. Plasmodia of Myxobolus guttae n. sp. were found in the fins of 75% of the specimens, and the myxospores were pear-shaped, measuring 12.3 ± 0.6 (10.3-13.5) μm in length, 8.1 ± 0.3 (7.1-8.6) μm in width, and 5.1 ± 0.6 (4.5-6.5) μm in thickness. The polar capsules were elongated and equal in size, measuring 6.8 ± 0.5 (5.8-7.6) μm in length and 2.5 ± 0.3 (1.8-3.1) μm in width, exhibiting polar tubules with 9-10 coils. The plasmodia of Myxobolus longus n. sp. were found in the gills of 45.8% of the C. macropomum specimens, and the myxospores were fusiform, measuring 16.4 ± 0.6 (14.7-17.3) μm in length, 7.1 ± 0.2 (6.8-7.7) μm in width and 5.5 ± 0.6 (4.4-6.6) μm in thickness. The polar capsules occupied more than half of the myxospore, exhibiting different sizes, the largest measuring 9.2 ± 0.5 (7.3-10.1) μm in length and 2.5 ± 0.3 (2.0-3.1) μm in width, while the smallest measured 8.5 ± 0.4 (7.1-9.1) μm in length and 2.4 ± 0.2 (1.9-3.0) μm in width. Both polar capsules contained polar tubules with 10-12 coils. For Myxobolus tambaquiensis n. sp., plasmodia were found in the opercular cavity of 41.7% of the fish specimens, and the myxospores had an oval shape, measuring 10.0 ± 0.4 (9.5-11.3) μm in length, 6.5 ± 0.2 (6.1-7.1) μm in width, and 4.6 ± 0.4 (3.9-5.6) μm in thickness. The polar capsules were elongated and equal in size, measuring 4.9 ± 0.2 (4.4-5.3) μm in length and 1.9 ± 0.2 (1.5-2.2) μm in width, closing with 8-9 coils of the polar tubule. The morphological and sequencing data of the SSU rDNA showed that the three species studied herein remain unknown to science, increasing the diversity of myxosporeans infecting C. macropomum, an iconic fish in South American freshwater fish farming. The SSU rDNA based phylogenetic analysis revealed that Myxobolus spp. parasites of C. macropomum did not have a monophyletic origin, identifying different times and pathways of the acquisition of parasites by this host species.
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Affiliation(s)
- Juliana M A Silva
- Center for Biological and Natural Sciences, Federal University of Acre (UFAC), Rio Branco, AC, Brazil.
| | - Edson A Adriano
- Department of Ecology and Evolutionary Biology, Federal University of São Paulo (UNIFESP), Diadema, SP, Brazil
| | - Lisandro J Vieira
- Center for Biological and Natural Sciences, Federal University of Acre (UFAC), Rio Branco, AC, Brazil
| | - Juliana Naldoni
- Department of Ecology and Evolutionary Biology, Federal University of São Paulo (UNIFESP), Diadema, SP, Brazil
| | - Francisco G A Santos
- Center for Biological and Natural Sciences, Federal University of Acre (UFAC), Rio Branco, AC, Brazil
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Tahir UB, Guo Q, Gu Z. Fins infestation induced by Myxobolus xiantaoensis in yellow catfish Tachysurus fulvidraco Richardson, 1846: Some pathophysiological and molecular insights. Microb Pathog 2021; 153:104772. [PMID: 33529735 DOI: 10.1016/j.micpath.2021.104772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 01/17/2021] [Accepted: 01/26/2021] [Indexed: 11/17/2022]
Abstract
The myxozoan parasite Myxobolus xiantaoensis is a fin pathogen of commercially important yellow catfish Tachysurus fulvidraco Richardson, 1846, in the freshwater ponds of China. In the present work, four geographical isolates of M. xiantaoensis were sampled from the fins of yellow catfish. It was found that the spores of four isolates exhibited few markable differences in morphometrics. The small subunit ribosomal DNA (SSU rDNA) sequences of four isolates were conspecific to the SSU rDNA sequence of M. xiantaoensis. No genetic level variation was observed, even in the characteristically more variable internal transcribed spacer (ITS) region. This absence of variability suggests high gene flow as a result of panmixia in the parasitic populations. ITS phylogeny placed four isolates of M. xiantaoensis in a clade together with myxozoans species infecting Siluriformes. The M. xiantaoensis infection inflicted severe hemorrhages on epidermis of ray-fins, which grew into inflammatory epithelial hyperplasia and lytic cartilage signs. The histochemical analysis of infected fins biopsies is characterized by damage of collagen components of cartilage, resulting in weakness, breaks, and missing fin rays. These tissue sections also had a remarkable inflammatory response around the fin cartilage, with the absence of mature spores and chondrocytes. These results indicate that the fin cartilage damage appeared before the development of tissue inflammation and the parasitic infestation of the fins. The present four geographical isolates of M. xiantaoensis were identified by a holistic approach of species characterization based on biological, morphological, and molecular evidence. These four isolates showed some morphological and genetic variations but within the intraspecific range.
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Affiliation(s)
- Urfa Bin Tahir
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, People's Republic of China; Hubei Engineering Technology Research Center of Aquatic Animal Diseases, Control, and Prevention, Wuhan, People's Republic of China; Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, People's Republic of China.
| | - Qingxiang Guo
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, People's Republic of China; Hubei Engineering Technology Research Center of Aquatic Animal Diseases, Control, and Prevention, Wuhan, People's Republic of China; Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, People's Republic of China
| | - Zemao Gu
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, People's Republic of China; Hubei Engineering Technology Research Center of Aquatic Animal Diseases, Control, and Prevention, Wuhan, People's Republic of China; Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, People's Republic of China.
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Batueva MDD. Morphological, histological, and molecular aspects of Myxobolus zaikae n. sp., a parasite of the roach Rutilus rutilus, in Lake Baikal. DISEASES OF AQUATIC ORGANISMS 2020; 142:75-82. [PMID: 33210614 DOI: 10.3354/dao03534] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A new myxobolid species, Myxobolus zaikae n. sp., was found in the connective tissue near the kidney and liver blood vessels of the common roach Rutilus rutilus, while fish myxosporean fauna were being investigated in Lake Baikal, Russia. The parasites were studied on the basis of spore morphology as well as with histological and molecular methods. Mature spores of M. zaikae n. sp. are round or ellipsoidal in the frontal view and lemon-shaped in the lateral view, measuring 11.37 ± 0.11 µm (10.2-14.0 µm) in length, 10.29 ± 0.10 µm (9.6-11.0 µm) in width, and 6.3 ± 0.08 µm (5.8-7.1 µm) in thickness (mean ± SD; n = 50). Polar capsules are equal and pyriform, measuring 4.5 ± 0.07 µm (3.4-5.2 µm) in length and 2.9 ± 0.03 µm (2.6-3.3 µm) in width. Polar capsules contained polar filaments coiled with 5 to 6 turns. Phylogenetic analysis showed that this newly described species clusters with other myxobolid species infecting the connective tissue of different organs from Palearctic cyprinid fish.
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Affiliation(s)
- Marina Dashi-Dorjievna Batueva
- Institute of General and Experimental Biology of the Siberian Branch, Russian Academy of Sciences, 670047 Ulan-Ude, Russia
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First report of Myxobolus episquamalis Egusa, Maeno & Sorimachi, 1990 (Myxozoa: Bivalvulida) in Lebranche mullet Mugil liza Valenciennes, 1836 (Teleostei: Mugiliformes) from Neotropical region. Parasitol Res 2020; 119:3869-3872. [DOI: 10.1007/s00436-020-06803-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 07/06/2020] [Indexed: 11/27/2022]
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38
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Two new species of Myxobolus (Cnidaria: Myxosporea) infecting freshwater fishes of Ranjit Sagar Wetland, Punjab, India. Microb Pathog 2020; 147:104421. [DOI: 10.1016/j.micpath.2020.104421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 07/11/2020] [Accepted: 07/22/2020] [Indexed: 11/18/2022]
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Mathews PD, Mertins O, Milanin T, Espinoza LL, Flores-Gonzales AP, Audebert F, Morandini AC. Molecular Phylogeny and taxonomy of a new Myxobolus species from the endangered ornamental fish, Otocinclus cocama endemic to Peru: A host-parasite coextinction approach. Acta Trop 2020; 210:105545. [PMID: 32502480 DOI: 10.1016/j.actatropica.2020.105545] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/10/2020] [Accepted: 05/16/2020] [Indexed: 01/22/2023]
Abstract
A new Myxobolus species is described infecting gill filaments of the endangered ornamental fish Otocinclus cocama from Peruvian Amazon. In a total of 35 fish examined, five (14.3%) had myxozoan plasmodia. Taxonomic analysis was performed integrating multiple characters, including morphometrical, biological traits, ssrDNA sequence data and host ecological characters. Myxospores of M. iquitoensis n. sp. were ovoid in shape from the frontal view and measured 17.6±1.2 µm (16.2-19.8 µm) in length and 10.5±0.7 µm (9.8-12 µm) in width. The two polar capsules were elongate in shape, equal in size and occupying almost half of the myxospore body. They measured 8.7±0.4 µm (6.9-9.3 µm) in length and 3.3±0.2 µm (3-3.6 µm) in width. The polar tubules presented six to seven turns. Molecular phylogenetic analysis revealed that the obtained ssrDNA sequence did not match any existing sequences in GenBank but showed M. iquitoensis n. sp. to be a close species of M. figueirae. Nonetheless, the ssrDNA sequences of those species show large genetic divergence. This is the first description and phylogenetic study of a myxozoan parasitizing fish of the genus Otocinclus from South America, as well the first report of these parasites infecting a fish belonging to the Loricariidae family from Amazon basin. Considering the endangered status of the host, the high degree of host-specificity of freshwater histozoic myxobolids, the low occurrence shown by the new myxozoan, and the fact that this is the only host known for this myxozoan, the conservation status of the new species of myxozoan is likely to be connected to the future survival of its host.
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Affiliation(s)
- Patrick D Mathews
- Department of Zoology, Institute of Biosciences, University of São Paulo, 05508-090, São Paulo, Brazil; Unité de Biologie des Organismes et Écosystèmes Aquatiques, Museum National d'Histoire Naturelle, Sorbonne Université, CNRS, IRD, UCA, CP 26, 75005 Paris, France.
| | - Omar Mertins
- Department of Biophysics, Paulista Medical Scholl, Federal University of São Paulo, 04023-062 São Paulo, Brazil
| | - Tiago Milanin
- Department of Basic Sciences, Faculty of Animal Science and Food Technology, University of São Paulo, 13635-900, São Paulo, Brazil
| | - Luis L Espinoza
- Laboratory of Biology and Molecular Genetics, Faculty of Veterinary Medicine, National University of San Marcos, 2800 San Borja, Lima, Peru
| | - Anai P Flores-Gonzales
- Post-Graduate Program in Tropical Biodiversity, Federal University of Amapá, 68903-419 Macapá, Brazil
| | - Fabienne Audebert
- Unité de Biologie des Organismes et Écosystèmes Aquatiques, Museum National d'Histoire Naturelle, Sorbonne Université, CNRS, IRD, UCA, CP 26, 75005 Paris, France
| | - André C Morandini
- Department of Zoology, Institute of Biosciences, University of São Paulo, 05508-090, São Paulo, Brazil
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40
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Stilwell JM, Stilwell NK, Camus AC, Ware C, Rosser TG, Griffin MJ. Necroulcerative dermatitis associated with Myxobolus dermatoulcerans n. sp. (Cnidaria: Myxobolidae) in red-bellied piranha, Pygocentrus nattereri Kner (Characiformes: Serrasalmidae), from Peru. Syst Parasitol 2020; 97:649-659. [PMID: 32951165 DOI: 10.1007/s11230-020-09936-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 07/30/2020] [Indexed: 11/28/2022]
Abstract
A group of red-bellied piranha, Pygocentrus nattereri Kner, recently imported from Peru exhibited multifocal, cutaneous ulcerations with exposure of the underlying musculature. Skin scrapes yielded moderate numbers of myxospores morphologically consistent with Myxobolus Bütschli, 1882. Myxospores from these fish were morphologically and molecularly distinct from other myxobolids infecting piranha. Myxospores are pyriform to capsular with a rounded posterior and slightly rounded to tapering anterior aspect in valvular view. Myxospore bodies are 14.3-17.8 (mean 16.1) µm long and 7.6-10.3 (mean 8.9) µm wide. Polar capsules are symmetrical, slender, elongate, and measure 7.4-10.2 (mean 9.2) µm long and 2.1-3.7 (mean 3.0) µm wide. Sequence generated for the 18S rRNA gene had no direct matches to any sequence available on GenBank but demonstrated less than 89% nucleotide similarity to various published and unpublished Myxobolus spp. from Piaractus brachypomus (Cuvier) and Colossoma macropomum (Cuvier). This paper provides the morphological and molecular characterisation of Myxobolus dermatoulcerans n. sp. from red-bellied piranha and describes associated pathological lesions.
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Affiliation(s)
- Justin M Stilwell
- Department of Pathology, University of Georgia, Athens, Georgia, 30602, USA.
| | - Natalie K Stilwell
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, University of Georgia, Athens, Georgia, 30602, USA
| | - Alvin C Camus
- Department of Pathology, University of Georgia, Athens, Georgia, 30602, USA
| | - Cyndi Ware
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, 39762, USA
| | - Thomas G Rosser
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, 39762, USA
| | - Matt J Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, 39762, USA
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Morphology and molecular data of two novel cnidarian myxosporean (Myxobolidae) infecting Piaractus brachypomus from the Amazon basin. Acta Trop 2020; 209:105533. [PMID: 32442433 DOI: 10.1016/j.actatropica.2020.105533] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/07/2020] [Accepted: 05/07/2020] [Indexed: 11/21/2022]
Abstract
The objective of this study was reports, through morphological and small subunit ribosomal DNA (SSU rDNA) sequencing, two novel myxobolid myxosporeans infecting Piaractus brachypomus, an economicaly important Amazonian fish popularly known as "pirapitinga". Of a total of 25 specimens of P. brachypomus examined 68% had the gill filament parasitized by Henneguya tapariensis n. sp. and 16% had infection of Myxobolus arapiuns n. sp. in the pyloric cecum. The morphological analysis revealed H. tapariensis n. sp. myxospores with an ellipsoid shape and caudal process larger than the length of the body. The polar capsules of same size were elongated and occupied less than half the body. Sequencing of the SSU rDNA generated a partial sequence of 1946 bp. In M. arapiuns n. sp. the myxospores had oval-shaped body and polar capsules of the same size, occupying less than half the body. Sequencing of the SSU rDNA generated a partial sequence of 1950 bp. Phylogenetic analysis revealed a cluster according to the order/family of the host, where H. tapariensis n. sp. was grouped in a subclade with Henneguya brachypomus and Henneguya piaractus and M. arapiuns grouped in a subclade with Myxobolus colossomatis, Myxobolus matosi and Myxobolus pirapitingae.
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42
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Increasing the known biodiversity of cnidarian parasites of bryconid fishes from South America: two novel Myxobolus species with ultrastructure and ssrDNA-based phylogeny. Parasitol Res 2020; 119:3627-3637. [PMID: 32852620 DOI: 10.1007/s00436-020-06863-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 08/23/2020] [Indexed: 10/23/2022]
Abstract
This study increases the known biodiversity of cnidarian parasites in neotropical bryconid fishes. Two novel Myxobolus species are described based on morphology, ultrastructure and small subunit ribosomal DNA (ssrDNA) sequencing: Myxobolus vetuschicanus n. sp. infecting fins of Salminus franciscanus and Myxobolus mineirus n. sp. infecting the mesentery of Brycon orthotaenia from the São Francisco River basin, Minas Gerais State, Brazil. Ultrastructural analysis of the two species revealed an asynchronous sporogenesis process, with germinative cells and young developmental stages of myxospores in the periphery of the plasmodia. In M. vetuschicanus n. sp., the plasmodia were surrounded by a layer of fibroblasts and in M. mineirus n. sp., the plasmodial membrane had direct contact with the host tissue. The phylogenetic analysis based on the ssrDNA of Henneguya/Myxobolus species showed that the two novel Myxobolus species grouped in subclades together with other parasite species of bryconid fishes.
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43
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Lisnerova M, Blabolil P, Holzer A, Jurajda P, Fiala I. Myxozoan hidden diversity: the case of Myxobolus pseudodispar Gorbunova, 1936. Folia Parasitol (Praha) 2020; 67. [PMID: 32764187 DOI: 10.14411/fp.2020.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 04/07/2020] [Indexed: 01/04/2023]
Abstract
Myxobolus pseudodispar Gorbunova, 1936 (Myxozoa) was originally described as a parasite of common roach, Rutilus rutilus (Linnaeus), with developing stages in muscles and spores disseminated in macrophage centres of different organs and tissues. Later, this parasite was described from several other cyprinids, but with relatively large intraspecific differences based on SSU rDNA gene sequences. Within our long-term study on myxozoan biodiversity, we performed a broad microscopic and molecular screening of various freshwater fish species (over 450 specimens, 36 species) from different localities. We investigated the cryptic species status of M. pseudodispar. Our analysis revealed four new unique SSU rDNA sequences of M. pseudodispar as well as an infection in new fish host species. Myxobolus pseudodispar sequence analysis showed clear phylogenetic grouping according to fish host criterion forming 13 well-recognised clades. Using 1% SSU rDNA-based genetic distance criterion, at least ten new species of Myxobolus Bütschli, 1882 may be recognised in the group of M. pseudodispar sequences. Our analysis showed the paraphyletic character of M. pseudodispar sequences and the statistical tests rejected hypothetical tree topology with the monophyletic status of the M. pseudodispar group. Myxobolus pseudodispar represents a species complex and it is a typical example of myxozoan hidden diversity phenomenon confirming myxozoans as an evolutionary very successful group of parasites with a great ability to adapt to a new hosts with subsequent speciation events.
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Affiliation(s)
- Martina Lisnerova
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic.,Department of Parasitology, Faculty of Sciences, University of South Bohemia, Ceske Budejovice, Czech Republic
| | - Petr Blabolil
- Institute of Hydrobiology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
| | - Astrid Holzer
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
| | - Pavel Jurajda
- Institute of Vertebrate Biology of the Czech Academy of Sciences, Brno, Czech Republic
| | - Ivan Fiala
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic.,Department of Parasitology, Faculty of Sciences, University of South Bohemia, Ceske Budejovice, Czech Republic
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Capodifoglio KRH, Adriano EA, Naldoni J, Meira CM, da Silva MRM, Maia AAM. Novel myxosporean species parasitizing an economically important fish from the Amazon basin. Parasitol Res 2020; 119:1209-1220. [PMID: 32189056 DOI: 10.1007/s00436-020-06641-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 02/25/2020] [Indexed: 11/28/2022]
Abstract
This paper provides morphological and phylogenetic analyses of two new myxobolid species found infecting Piaractus brachypomus from the Amazon basin. The fish were caught in the Tapajós River, in the municipality of Santarém, in the state of Pará, Brazil. The plasmodial development of Henneguya brachypomus n. sp. occurred in the gill lamellae while Myxobolus pirapitingae n. sp. developed in the pyloric cecum. Morphological analyses did not identify inflammatory infiltrate for either species, but H. brachypomus n. sp. induced stretching of the epithelium, compression of the adjacent tissues, and displacement and deformation of the neighboring lamellae. The mature myxospores of H. brachypomus n. sp. were ellipsoid, with a length of 11.7-13.8 μm, a width of 4.0-4.6 μm, and a thickness of 3.5-4.3 μm. The polar capsules were elongated, with a length of 5.6-7.3 μm and a width of 1.3-2.0 μm, and each contained a polar filament with 8-9 coils. The caudal process was 40.5-48.1 μm long and the total length of the myxospore was 52.4-61.6 μm. Myxobolus pirapitingae n. sp. exhibited rounded mature myxospores measuring 10.0-11.1 μm in length, 7.0-7.6 μm in width, and 5.4-6.3 μm in thickness. The polar capsules were of equal size and occupied less than half the myxospore, measuring 3.5-4.0 μm in length and 2.0-2.6 μm in width, with each containing a polar filament with 6-7 coils. Phylogenetic analysis based on partial small subunit ribosomal DNA (ssrDNA) sequences showed that H. brachypomus n. sp. clustered as a sister species of Henneguya piaractus, while M. pirapitingae n. sp. was grouped in a sub-clade together with Myxobolus matosi and Myxobolus colossomatis.
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Affiliation(s)
- Kassia R H Capodifoglio
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga, SP, Brazil
| | - Edson A Adriano
- Department of Ecology and Evolutionary Biology, Federal University of São Paulo (UNIFESP), Diadema, SP, Brazil. .,Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
| | - Juliana Naldoni
- Department of Ecology and Evolutionary Biology, Federal University of São Paulo (UNIFESP), Diadema, SP, Brazil
| | - Caroline M Meira
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga, SP, Brazil
| | - Marcia R M da Silva
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga, SP, Brazil
| | - Antonio A M Maia
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo (USP), Pirassununga, SP, Brazil
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Morozova DA, Voronin VN, Katokhin AV. Common dace (Leuciscus leuciscus) - A new host of the myxozoan fish parasite, Myxobolus elegans (Cnidaria: Myxozoa) - Short communication. Acta Vet Hung 2020; 68:34-36. [PMID: 32384060 DOI: 10.1556/004.2020.00009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 11/14/2019] [Indexed: 11/19/2022]
Abstract
This paper reports the detection of the myxozoan species Myxobolus elegans Kashkovsky 1966 in common dace (Leuciscus leuciscus) that has not been previously listed as its host. The problem of differentiation of phenotypically similar Myxobolus species is addressed. During parasitological survey of common dace from the desalinated part of the Gulf of Finland at the city of Sestroretsk, Russia, numerous oval-shaped plasmodia, 0.2-0.4 mm in size, filled with Myxobolus spores were found on the gills. Pear-shaped myxospores were 15.4 (14.8-16.0) × 10.2 (9.6-10.9) µm in size with a rib on each valve. On the basis of spore morphology, the species appeared to be similar to M. elegans and Myxobolus hungaricus Jaczó, 1940. In order to identify the species, molecular genetic analysis was performed, and the species was identified on the basis of morphological characteristics and 18S rDNA data. The results obtained indicate that the Myxobolus species observed on the gills of dace is M. elegans. Thus, common dace is another valid host of M. elegans besides the type host, ide (Leuciscus idus).
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Affiliation(s)
- Daria A. Morozova
- 1Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Yaroslavskaya oblast 109, Borok, 152742, Russia
| | - Vladimir N. Voronin
- 2Federal State Budgetary Educational Institution of Higher Education, St. Petersburg State Academy of Veterinary Medicine, Saint Petersburg, Russia
| | - Alexey V. Katokhin
- 3Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
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Naldoni J, Pereira JOL, Milanin T, Adriano EA, da Silva MRM, Maia AAM. Taxonomy, phylogeny and host-parasite interaction of two novel Myxobolus species infecting Brycon orthotaenia from the São Francisco River, Brazil. Parasitol Int 2020; 76:102061. [PMID: 31978596 DOI: 10.1016/j.parint.2020.102061] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 01/16/2020] [Indexed: 11/27/2022]
Abstract
Two new Myxobolus species were described infecting Brycon orthotaenia from the São Francisco River, in the state of Minas Gerais, Brazil. From a total of 39 B. orthotaenia collected, two specimens (5.1%) exhibited infection of the ovary and 12 specimens (30.8%) displayed infection of the liver. The plasmodia of both Myxobolus species were white and spherical measuring around 1 mm in length. The plasmodium found in the ovary showed mature myxospores, which were oval shaped from the frontal view and measured 9.2-11.0 (9.8 ± 0.4) μm in length, 5.9-6.9 (6.5 ± 0.3) μm in width and 4.6-5 (4.9 ± 0.1) μm in diameter. The two polar capsules were the same size and measured 3.9-6.2 (4.7 ± 0.5) μm in length and 1.8-2.4 (2.1 ± 0.2) μm in width. The polar tubules had 9 coils. The plasmodium found in the liver showed mature myxospores which were ellipsoidal in shape from the frontal view and measured 10.0-11.4 (10.7 ± 0.5) μm in length, 7.3-8.6 (8.1 ± 0.4) μm in width and 5.3-7.0 (6.8 ± 0.4) μm in diameter. The two polar capsules were the same size and measured 4.2-5.4 (4.9 ± 0.3) μm in length and 1.9-2.9 (2.7 ± 0.3) μm in width. The polar tubules had 8 coils. Ultrastructural analysis revealed an asynchronous sporogenesis process, with young developmental myxospore stages more often found in the periphery of the plasmodium and mature myxospores in the centre of the plasmodium. The plasmodial wall was formed by a single membrane which was not surrounded by a layer of host tissue. A thick layer of fibrous material was found in the peripheral ectoplasm close to the plasmodial wall of the plasmodium found in the ovary. Phylogenetic analysis based on the small-subunit ribosomal DNA - ssrDNA sequences and using the closest myxozoan sequences to each one of the species studied here based on previous GenBank data and Henneguya/Myxobolus/Thelohanellus species parasitizing fish from South American, revealed that the new species are grouped in a subclade together with other Myxobolus species parasitizing bryconid hosts.
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Affiliation(s)
- Juliana Naldoni
- Department of Ecology and Evolutionary Biology, Federal University of São Paulo - UNIFESP. Rua Professor Arthur Riedel, 275, Jardim Eldorado, CEP, 09972-270 Diadema, SP, Brazil
| | - Jose O L Pereira
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, São Paulo University, Avenida Duque de Caxias Norte, 225, CEP, 13635-900 Pirassununga, SP, Brazil
| | - Tiago Milanin
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, São Paulo University, Avenida Duque de Caxias Norte, 225, CEP, 13635-900 Pirassununga, SP, Brazil.
| | - Edson A Adriano
- Department of Ecology and Evolutionary Biology, Federal University of São Paulo - UNIFESP. Rua Professor Arthur Riedel, 275, Jardim Eldorado, CEP, 09972-270 Diadema, SP, Brazil; Department of Animal Biology, Institute of Biology, University of Campinas, Caixa Postal 6109, CEP, 13083-970 Campinas, SP, Brazil
| | - Marcia R M da Silva
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, São Paulo University, Avenida Duque de Caxias Norte, 225, CEP, 13635-900 Pirassununga, SP, Brazil
| | - Antonio A M Maia
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, São Paulo University, Avenida Duque de Caxias Norte, 225, CEP, 13635-900 Pirassununga, SP, Brazil
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Milanin T, Bartholomew JL, Atkinson SD. Myxobolus spp. (Cnidaria: Myxozoa) in introduced yellow perch Perca flavescens (Mitchill, 1814). Parasitol Res 2020; 119:893-901. [PMID: 31938889 DOI: 10.1007/s00436-019-06585-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 12/18/2019] [Indexed: 12/18/2022]
Abstract
We surveyed introduced yellow perch Perca flavescens (Mitchill, 1814) from the Willamette River, OR, USA, to determine if these fish have co-introduced myxosporean parasites. Mature parasite myxospores were observed in brains of 3/19 fish, and were morphologically and molecularly consistent with Myxobolus neurophilus (Guilford 1963), a parasite known from yellow perch in their native range. We identified another Myxobolus species from the gill filaments of 1/22 fish. The spores from the gill filaments were oval-shaped, 11.7 (10.7-12.3) μm long × 8.6 (7.7-9.0) μm wide × 5.2 (4.6-5.6) μm thick, with two oval-shaped polar capsules 5.7 (5.1-6.5) μm × 2.7 (2.4-3.2) μm, each containing a polar tubule with 8-9 turns. Small-subunit ribosomal DNA sequences from each of four plasmodia were identical, and 4.0% different (over 1800 nucleotides) from the closest known myxosporeans. Interestingly, these sequences had overlapping peaks in their chromatograms, which suggested that DNA from multiple species was present. Hence, we isolated and sequenced three individual myxospores and found that they too had mixed chromatograms, which indicated presence of at least two sequence types of small-subunit ribosomal DNA in each spore (GenBank accession MK592012, MK592013), a rare character among described myxosporeans. The spore morphology, morphometry, tissue tropism, and DNA sequence supported a diagnosis of a novel species, Myxobolus doubleae n. sp. This parasite is unknown from yellow perch in its native range, despite extensive historical surveys, which suggests that introduced yellow perch might have acquired an endemic Myxobolus species via spillback from another fish host.
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Affiliation(s)
- T Milanin
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, 225 Duque de Caxias Norte Av, University of Sao Paulo, Pirassununga, Sao Paulo State, 13635-900, Brazil
| | - J L Bartholomew
- Department of Microbiology, 226 Nash Hall, Oregon State University, Corvallis, OR, 97331, USA
| | - S D Atkinson
- Department of Microbiology, 226 Nash Hall, Oregon State University, Corvallis, OR, 97331, USA.
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Garg A, Chaudhary A, Gupta A, Kumar A, Sharma B, Singh HS. Molecular Characterization of Two Myxosporean Species, Henneguya namae Haldar et al. 1983 and Myxobolus sophorae Jayasri, 1982 (Myxosporea: Myxobolidae). ACTA PROTOZOOL 2020. [DOI: 10.4467/16890027ap.20.003.12159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In Indian freshwater fish myxosporean infections are among the most cosmopolitan parasites, they are relatively well studied morphologically but their phylogenetic relationships were unclear and the genetic data is limited only to a few species. The study aims to present molecular data for two myxosporean species, Henneguya namae Haldar et al. 1983 and Myxobolus sophorae Jayasri, 1982 collected from Indian freshwater fish, the elongate glass-perchlet Chanda nama (=Ambassis nama) and pool barb Puntius sophore, respectively. In the present study molecular data are provided for H. namae and M. sophorae using nested PCR. The obtained partial 18S rDNA gene sequences were analyzed using maximum likelihood (ML) and Bayesian inference (BI) methods. The 18S rDNA gene sequences of H. namae showed similarity with the sequences of H. chaudhuryi, Henneguya sp. RA-2015, H. voronini and H. setiuensis about 72.1 to 78% and M. sophorae with Myxobolus ticto was about 90% respectively. The aim of this paper was to identify H. namae and M. sophorae morphologically and using molecular methods.
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Mcallister CT, Fayton TJ, Cloutman DG, Bursey CR, Robison HW, Trauth SE, Whipps CM. Parasites of the Golden Topminnow, Fundulus chrysotus (Cyprinodontiformes: Fundulidae), from Arkansas, U.S.A. COMP PARASITOL 2019. [DOI: 10.1654/1525-2647-87.1.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chris T. Mcallister
- Division of Science and Mathematics, Eastern Oklahoma State College, Idabel, Oklahoma 74745, U.S.A. (e-mail: )
| | - Thomas J. Fayton
- Department of Microbiology and Immunology, Cornell University, Ithaca, New York 14853, U.S.A. (e-mail: )
| | | | - Charles R. Bursey
- Department of Biology, Pennsylvania State University–Shenango Campus, Sharon, Pennsylvania 16146, U.S.A. (e-mail: )
| | - Henry W. Robison
- 9717 Wild Mountain Drive, Sherwood, Arkansas 71754, U.S.A. (e-mail: )
| | - Stanley E. Trauth
- Department of Biological Sciences, Arkansas State University (Emeritus), State University, Arkansas 72467, U.S.A. (e-mail: )
| | - Christopher M. Whipps
- Environmental and Forest Biology, SUNY College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, New York 13210, U.S.A. (e-mail:)
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Zhang JY, Liu XH, Voronin VN, Dudin AS, Tokarev YS. Myxobolus pelecicola Voronin et Dudin 2015 is a junior synonym of Myxobolus ladogensis Rumyantsev et Schulman 1997 (Myxosporea: Myxobolidae) infecting the skeletal muscle of sichel Pelecus cultratus (Actinopterygii: Cyprinidae) in Russia. Parasitol Res 2019; 118:3099-3103. [PMID: 31486945 DOI: 10.1007/s00436-019-06444-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 08/27/2019] [Indexed: 11/26/2022]
Abstract
Myxobolus pelecicola Voronin et Dudin, 2015 was recently described from the skeletal musculature of sichel Pelecus cultratus. However, another species, Myxobolus ladogensis Rumyantsev et Schulman, 1997, was described previously from the same host, displaying identical tissue localization and spore morphology as in M. pelecicola. Unfortunately, M. ladogensis was overlooked when M. pelecicola was described, resulting in the superfluous description of the latter species, which, according to the International Code of Zoological Nomenclature, is a junior synonym of M. ladogensis. The description of M. ladogensis is supplemented with SSU rDNA sequence analysis supporting the conspecificity with M. pelecicola. The closest relatives of Myxobolus ladogensis (syn. M. pelecicola) include several muscle-infecting Myxobolus spp. with sequence similarity below 97%.
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Affiliation(s)
- Jin-Yong Zhang
- Key Laboratory of Aquaculture Diseases Control, Ministry of Agriculture, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Xin-Hua Liu
- Key Laboratory of Aquaculture Diseases Control, Ministry of Agriculture, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
- University of Chinese Academy of Science, Beijing, 10049, China
| | - Vladimir N Voronin
- State Academy of Veterinary Medicine, Saint-Petersburg, Russia, 196084
- State Research Institute of Lake and River Fisheries, Makarova Emb. 26, Saint-Petersburg, Russia, 199053
| | - Alexander S Dudin
- State Research Institute of Lake and River Fisheries, Makarova Emb. 26, Saint-Petersburg, Russia, 199053
| | - Yuri S Tokarev
- All-Russian Institute of Plant Protection, Podbelskogo 3, Pushkin, Saint-Petersburg, Russia, 196608.
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