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Fungal Infections in Fishes and Aquatic Invertebrates, Second Edition
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Fungal Infections in Fishes and Aquatic Invertebrates, Second Edition

A special issue of Journal of Fungi (ISSN 2309-608X). This special issue belongs to the section "Fungal Pathogenesis and Disease Control".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 3543

Special Issue Editor

Dr. Joseph Matthew Groff

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Guest Editor
Retired, Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, CA 95618, USA
Interests: infectious and non-infectious diseases of aquatic organisms; emergent disease; ecology of aquatic animal disease
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Fungi and fungus-like organisms such as oomycetes and the protistan Ichthyophonus sp. are common pathogens of wild and cultured fishes and aquatic invertebrates that can result in severe disease and increased mortality in affected populations, further resulting in significant financial losses to aquaculturists and loss of normal homeostasis in impacted ecosystems. Furthermore, there has recently been an increased incidence of fungal diseases in aquatic organisms, whereas several mycotic diseases can be considered emergent. In contrast, the composition and importance of the fungal microbiome (mycobiome) in aquatic organisms has generally been ignored, and requires further detailed investigation. Therefore, the objective of this Special Issue is to document the most current information on the fungal pathogens affecting fishes and aquatic invertebrates, including the imperfect fungi, dematiaceous fungi, euendolithic fungi and fungal pathogens of corals, microsporidia, and the fungal-like oomycetes and protistans such as Ichthyophonus sp. (but not restricted to these pathogens), and the fungi composing the normal mycobiome of aquatic organisms. This documentation can include basic and applied research focused on the biology and taxonomy of the organism, pathogenesis of disease, host response to disease, diagnostic methodologies, emergent disease, zoonotic disease, the mycobiome, and detailed reviews.

Dr. Joseph Matthew Groff
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Fungi is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • fish and aquatic invertebrates
  • coral
  • mycoses
  • emergent disease
  • zoonotic disease
  • imperfect fungi
  • dematiaceous fungi
  • euendolithic fungi
  • microsporidia
  • oomycetes
  • Ichthyophonus
  • mycobiome

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Published Papers (2 papers)

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Research

20 pages, 4910 KiB  
Article
Specific Phylotypes of Saprolegnia parasitica Associated with Atlantic Salmon Freshwater Aquaculture
by Kypher Varin Shreves, Marcia Saraiva, Tahmina Ruba, Claire Miller, E. Marian Scott, Debbie McLaggan and Pieter van West
J. Fungi 2024, 10(1), 57; https://doi.org/10.3390/jof10010057 - 9 Jan 2024
Cited by 2 | Viewed by 1920
Abstract
Saprolegniosis is a major destructive disease in freshwater aquaculture. The destructive economic impact of saprolegniosis on freshwater aquaculture necessitates further study on the range of Saprolegnia species within Atlantic salmon fish farms. This study undertook a thorough analysis of a total of 412 [...] Read more.
Saprolegniosis is a major destructive disease in freshwater aquaculture. The destructive economic impact of saprolegniosis on freshwater aquaculture necessitates further study on the range of Saprolegnia species within Atlantic salmon fish farms. This study undertook a thorough analysis of a total of 412 oomycete and fungal isolates that were successfully cultured and sequenced from 14 aquaculture sites in Scotland across a two-year sampling period. An ITS phylogenetic analysis of all isolates was performed according to whether they were isolated from fish or water samples and during enzootic or epizootic periods. Several genera of oomycetes were isolated from sampling sites, including Achlya, Leptolegnia, Phytophthora, and Pythium, but by far the most prevalent was Saprolegnia, accounting for 66% of all oomycetes isolated. An analysis of the ITS region of Saprolegnia parasitica showed five distinct phylotypes (S2–S6); S1 was not isolated from any site. Phylotype S2 was the most common and most widely distributed phylotype, being found at 12 of the 14 sampling sites. S2 was overwhelmingly sampled from fish (93.5%) and made up 91.1% of all S. parasitica phylotypes sampled during epizootics, as well as 67.2% of all Saprolegnia. This study indicates that a single phylotype may be responsible for Saprolegnia outbreaks in Atlantic salmon fish farms, and that water sampling and spore counts alone may be insufficient to predict Saprolegnia outbreaks in freshwater aquaculture. Full article
(This article belongs to the Special Issue Fungal Infections in Fishes and Aquatic Invertebrates, Second Edition)
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11 pages, 2956 KiB  
Article
Establishment and Application of Real-Time Fluorescence Quantitative PCR Detection Technology for Metschnikowia bicuspidata Disease in Eriocheir sinensis
by Yuenan Xing, Ye Chen, Chengcheng Feng, Jie Bao, Xiaodong Li and Hongbo Jiang
J. Fungi 2023, 9(8), 791; https://doi.org/10.3390/jof9080791 - 27 Jul 2023
Cited by 3 | Viewed by 1233
Abstract
Metschnikowia bicuspidata causes a “milky disease” in Chinese mitten crab, Eriocheir sinensis, which inflicts significant damage on the breeding industry, but there are no effective drugs for this disease. Precise detection technologies and clarification of transmission routes are now essential to prevent [...] Read more.
Metschnikowia bicuspidata causes a “milky disease” in Chinese mitten crab, Eriocheir sinensis, which inflicts significant damage on the breeding industry, but there are no effective drugs for this disease. Precise detection technologies and clarification of transmission routes are now essential to prevent its occurrence. A real-time fluorescent quantitative PCR (qPCR) detection method targeting the mitochondrial cytochrome c oxidase subunit VIA (COX6A) of M. bicuspidata was developed and its sensitivity, specificity, repeatability, and application effectiveness evaluated. There was a robust linear relationship between the qPCR threshold cycle value (Ct) and copy number of the standard with a wide dynamic range. The standard curve had a correlation coefficient (R2) of 0.996, amplification efficiency of 103.092%, and a lower limit of detection sensitivity of 7.6 × 101 copies/µL. The COX6A-qPCR method exhibited high specificity for the detection of M. bicuspidata, with no cross-reactivity. The intra- and inter-group variation coefficients were <1% and 2%, respectively. The qPCR exhibited superior sensitivity compared to existing detection methods, with a positivity rate of 76.67%. The M. bicuspidata content ranged from 1.0 × 101–2.7 × 106 copies/µL. The COX6A-qPCR detection technology exhibited high sensitivity, strong specificity, and excellent repeatability, enabling the accurate quantification of M. bicuspidata. Full article
(This article belongs to the Special Issue Fungal Infections in Fishes and Aquatic Invertebrates, Second Edition)
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