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Fujiwara T, Kawano KM, Sonoda M, Shimizu N, Sawayama E, Yanagida T. First report of Pleistophora hyphessobryconis infection in medaka Oryzias latipes, an important ornamental and laboratory fish in Japan. Parasitol Int 2024; 98:102825. [PMID: 37981261 DOI: 10.1016/j.parint.2023.102825] [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: 09/12/2023] [Revised: 10/23/2023] [Accepted: 11/12/2023] [Indexed: 11/21/2023]
Abstract
Medaka Oryzias latipes is a small freshwater fish widely distributed in Japan. It is a popular ornamental fish and now has been recognized as an important model organism in many areas of biological research. Here we report microsporidian infections for the first time in medaka, from 2 research facilities and a wild population. Infected medaka exhibited abnormal appearance with whitish trunk muscle, and microsporidian spores were detected from the affected tissue. The size of spores was similar in all the three cases: 7.0 μm in length and 3.7-4.2 μm in width. In the histological observation, numerous sporophorous vesicles containing spores or other developmental stages were observed within the myocytes of the trunk muscle. Nucleotide sequence of the ribosomal RNA gene was determined and it was identical among all three cases. A BLAST search revealed it shared 99.5-99.6% identity with Pleistophora hyphessobryconis, a microsporidian known to infect >20 freshwater fish species. Light microscopic observation of spores and histological features also indicated the microsporidian infection in medaka is caused by P. hyphessobryconis. This is the first record of the microsporidian species from medaka and from Japan.
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Affiliation(s)
- Takuto Fujiwara
- Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
| | - Karina Midori Kawano
- Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
| | - Misaki Sonoda
- Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
| | - Nodoka Shimizu
- Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan
| | - Eitaro Sawayama
- Department of Marine Science, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa 252-0880, Japan
| | - Tetsuya Yanagida
- Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan; Joint Graduate School of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi, Japan.
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Weng M, Zhang X, Xin Z, Xue S, Zhang Q, Li A, Zhang J. Intraspecific genetic diversity of the fish-infecting microsporidian parasite Pseudokabatana alburnus (Microsporidia). Front Microbiol 2023; 14:1129136. [PMID: 36970667 PMCID: PMC10034183 DOI: 10.3389/fmicb.2023.1129136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 02/21/2023] [Indexed: 03/12/2023] Open
Abstract
Pseudokabatana alburnus is a xenoma-forming fish microsporidium, firstly described from the liver of the Culter alburnus from Poyang Lake in China. In the present study, P. alburnus was firstly reported from the ovary of 6 other East Asian minnows, including Squaliobarbus curriculus, Hemiculter leucisculus, Cultrichthys erythropterus, Pseudolaubuca engraulis, Toxabramis swinhonis, and Elopichthys bambusa. Genetic analysis revealed high sequence diversity in the ribosomal internal transcribed spacer region (ITS) and the largest subunit of RNA polymerase II (Rpb1) loci of P. alburnus isolated from different hosts and locations. The variation of Rpb1 mainly occurred in the 1,477–1737 bp regions. The presence of a wide variety of Rpb1 haplotypes within a single fish host, together with evidence of genetic recombination suggested that P. alburnus may have the intergenomic variation and sexual reproduction might be present in other hosts (possibly freshwater shrimp). Phylogenetic analysis and population genetic analysis showed that there was no geographical population divergence for P. alburnus. Homogeneity and high variability of ITS sequences indicates that ITS may be a suitable molecular marker to distinguish different P. alburnus isolates. Our data confirm the broad geographical distribution and host range of P. alburnus in the middle and lower reaches of the Yangtze River. Additionally, we emendated the genus Pseudokabatana to exclude the infection site, liver as one of the taxonomic criteria, and proposed that fish ovary was be the general infection site of P. alburnus.
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Affiliation(s)
- Meiqi Weng
- Laboratory of Aquatic Parasitology and Microbial Resources, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Key Laboratory of Aquaculture Diseases Control, Ministry of Agriculture and State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Xintong Zhang
- Laboratory of Aquatic Parasitology and Microbial Resources, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Zhaozhe Xin
- Laboratory of Aquatic Parasitology and Microbial Resources, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Sijia Xue
- Laboratory of Aquatic Parasitology and Microbial Resources, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Qianqian Zhang
- Key Laboratory of Aquaculture Diseases Control, Ministry of Agriculture and State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Aihua Li
- Key Laboratory of Aquaculture Diseases Control, Ministry of Agriculture and State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Jinyong Zhang
- Laboratory of Aquatic Parasitology and Microbial Resources, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, Shandong, China
- *Correspondence: Jinyong Zhang,
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Weng M, Zhang X, Xin Z, Xue S, Zhang Q, Li A, Zhang J. Morphological characterization and genetic diversity of a new microsporidium, Neoflabelliforma dubium n. sp. from the adipose tissue of Diaphanosoma dubium (Crustacea: Sididae). Front Cell Infect Microbiol 2023; 13:1125394. [PMID: 36779184 PMCID: PMC9911548 DOI: 10.3389/fcimb.2023.1125394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 01/16/2023] [Indexed: 01/28/2023] Open
Abstract
We reported a new microsporidium Neoflabelliforma dubium n. sp. from the adipose tissue of Diaphanosoma dubium in China. The infected daphnids generally appeared opaque due to the presence of numerous spore aggregates located in the adipose tissue. All developmental stages were in direct contact with the host cell cytoplasm. Multinucleate sporogonial plasmodia developed into uninucleate sporoblasts by rosette-like fashion. Mature spores were pyriform and monokaryotic, measuring 4.02 ± 0.24 (3.63-4.53) µm long and 2.27 ± 0.15 (2.12-2.57) µm wide (N = 40). The polaroplast was bipartite with a tightly packed anterior lamellae and a loosely aligned posterior lamellae. Isofilar polar filament was coiled 9-11 turns and arranged in 2-3 rows. The phylogenetic analysis based on the obtained SSU rDNA sequence indicated that the N. dubium n. sp. clustered with the freshwater oligochaete-infecting N. aurantiae to form an independent monophyletic group, positioned at the base of Clade 4. In addition, we analyzed the genetic diversity in three N. dubium n. sp. isolates based on the rDNA (SSU rDNA, ITS and LSU rDNA) and Rpb1 gene. The genetic variation among the rDNA sequences was not distinct, however, high nucleotide diversity could be observed in Rpb1 gene, and a wide variety of Rpb1 haplotypes were identified within each isolate. Genetic recombination detected in the Rpb1 sequences presumes cryptic sexual process occurring in N. dubium n. sp. Statistical evolutionary analyses further indicated that the purifying selection eliminated mutations in the Rpb1 gene.
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Affiliation(s)
- Meiqi Weng
- The Laboratory of Aquatic Parasitology, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Key Laboratory of Aquaculture Diseases Control, Ministry of Agriculture and State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Xintong Zhang
- The Laboratory of Aquatic Parasitology, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Zhaozhe Xin
- The Laboratory of Aquatic Parasitology, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Sijia Xue
- The Laboratory of Aquatic Parasitology, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Qianqian Zhang
- Key Laboratory of Aquaculture Diseases Control, Ministry of Agriculture and State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Aihua Li
- Key Laboratory of Aquaculture Diseases Control, Ministry of Agriculture and State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Jinyong Zhang
- The Laboratory of Aquatic Parasitology, School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, Shandong, China
- *Correspondence: Jinyong Zhang,
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Microsporidia: a new taxonomic, evolutionary, and ecological synthesis. Trends Parasitol 2022; 38:642-659. [PMID: 35667993 DOI: 10.1016/j.pt.2022.05.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 05/12/2022] [Accepted: 05/12/2022] [Indexed: 02/08/2023]
Abstract
Microsporidian diversity is vast. There is a renewed drive to understand how microsporidian pathological, genomic, and ecological traits relate to their phylogeny. We comprehensively sample and phylogenetically analyse 125 microsporidian genera for which sequence data are available. Comparing these results with existing phylogenomic analyses, we suggest an updated taxonomic framework to replace the inconsistent clade numbering system, using informal taxonomic names: Glugeida (previously clades 5/3), Nosematida (4a), Enterocytozoonida (4b), Amblyosporida (3/5), Neopereziida (1), and Ovavesiculida (2). Cellular, parasitological, and ecological traits for 281 well-defined species are compared with identify clade-specific patterns across long-branch Microsporidia. We suggest that future taxonomic circumscriptions of Microsporidia should involve additional markers (SSU/ITS/LSU), and that a comprehensive suite of phenotypic and ecological traits help to predict broad microsporidian functional and lineage diversity.
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Naidispora caidianensis n. gen. n. sp. infecting coelomocytes of oligochaete Branchiura sowerbyi (Oligochaeta: Naididae) in China. J Invertebr Pathol 2022; 191:107768. [DOI: 10.1016/j.jip.2022.107768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 05/02/2022] [Accepted: 05/09/2022] [Indexed: 11/17/2022]
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Stratton CE, Moler P, Allain TW, Reisinger LS, Behringer DC, Bojko J. The plot thickens: Ovipleistophora diplostomuri infects two additional species of Florida crayfish. J Invertebr Pathol 2022; 191:107766. [DOI: 10.1016/j.jip.2022.107766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 04/12/2022] [Accepted: 04/19/2022] [Indexed: 10/18/2022]
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