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Zhao X, Yin Q, Cai J, Wei Q, Li D, Yu J, Xiang J, Zhang J, Liu X. Myxobolus dabryi n. sp. (Myxozoa: Myxobolidae) Infecting the Gills of Chanodichthys dabryi, Bleeker, 1871 (Cypriniformes: Cyprinidae) in Hunan Province, China. Animals (Basel) 2024; 14:2487. [PMID: 39272272 PMCID: PMC11393873 DOI: 10.3390/ani14172487] [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: 07/24/2024] [Revised: 08/11/2024] [Accepted: 08/20/2024] [Indexed: 09/15/2024] Open
Abstract
Culters are a popular and economically important carnivorous freshwater fish, widely distributed in rivers, lakes, and reservoirs in China. An investigation of Myxozoa was conducted to enhance the understanding of Myxozoan diversity in Culters in China, as only 15 Myxosporean species have been previously reported in 6 Culters species. A new species with typical Myxobolus characteristics was discovered exclusively in the gills of Chanodichthys dabryi, Bleeker, 1871, and no other species were found in other Culters fish or organs. The new species elicited whitish plasmodia in the serosa layer of the gill arch, with no distinct inflammatory reaction observed. This species is morphologically different from all reported Myxobolus spp. from Culters, differing in plasmodium and spore size, as well as the coils of polar filaments. Molecular analysis further supports that it does not match any sequences available in GenBank. Therefore, we identified it as a new species and named it Myxobolus dabryi n. sp.
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Affiliation(s)
- Xiaojing Zhao
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Hunan Agricultural University, Changsha 410128, China
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Qi Yin
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Hunan Agricultural University, Changsha 410128, China
| | - Jia Cai
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, Zhanjiang 524000, China
| | - Qiang Wei
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Hunan Agricultural University, Changsha 410128, China
| | - Deliang Li
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Hunan Agricultural University, Changsha 410128, China
| | - Jianbo Yu
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Hunan Agricultural University, Changsha 410128, China
| | - Jianguo Xiang
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Hunan Agricultural University, Changsha 410128, China
| | - Jinyong Zhang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
| | - Xinhua Liu
- Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Hunan Agricultural University, Changsha 410128, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, Zhanjiang 524000, China
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Zhang B, Tu X, Gu Z. Histopathological evaluation of the infection elicited by three species of Myxobolus (Cnidaria: Myxosporea), with identification of Myxobolusxiaoganensis n. sp. isolated from the silver carp Hypophthalmichthys molitrix. Microb Pathog 2023; 183:106306. [PMID: 37582423 DOI: 10.1016/j.micpath.2023.106306] [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: 06/02/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/17/2023]
Abstract
Several parasites infecting the Asian carp species have been broadly spread along with the global fish trade. However, the diversity of specific parasite groups and their pattern of parasitism remain insufficiently elucidated even in their native regions. Here, we conducted a holistic identification and histological analysis of three Myxobolus species. The oblate myxospores of the first isolates were found infecting the spleen of silver carp Hypophthalmichthys molitrix, measuring 6.4 ± 0.4 (5.4-7.1) μm in length, 8.2 ± 0.4 (7.5-9.0) in width, and 5.9 ± 0.3 (5.2-6.2) in thickness. They were morphologically distinct from other congeners and regarded as a novel species, Myxobolus xiaoganensis n. sp. For the second isolates, we associated the formation of round plasmodia on the gill raker of silver carp with Myxobolus allotypica Chen, 1998. The third isolates, encapsulated in the intestinal serosa membrane of the grass carp Ctenopharyngodon idella, was proved to be conspecific to Myxobolus huasaensis Chen, 1998. While M. xiaoganensis n. sp. and M. huasaensis exhibited distinct origins, with genetic differences exceeding 4% from other congeners, M. allotypica displayed complete genetic congruence with an item available in Genbank. Histologically, myxospores of M. xiaoganensis n. sp. were scattered in the spleen, and the branchial and intestinal infections of M. allotypica and M. huasaensis were determined, respectively. Phylogenetic analysis demonstrated a non-monophyletic origin of both the Thelohanellus and Myxobolus genera, with a remarkable association of host affinity with myxosporean clustering.
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Affiliation(s)
- Bo Zhang
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, 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
| | - Xiao Tu
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, 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, 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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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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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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Morphological and molecular characterization of a new species Myxobolus gutturocola n. sp. (Myxozoa: Myxobolidae) from the throat of Hypophthalmichthys molitrix in China. Parasitol Res 2019; 118:773-781. [DOI: 10.1007/s00436-019-06226-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 01/24/2019] [Indexed: 10/27/2022]
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