Parasitic Diseases of Fish: Identification, Host-Parasite Interactions and Molecular Biology

Kumar, Gokhlesh and Sudhagar, Arun and Saravanan, Kandasamy (2025) Parasitic Diseases of Fish: Identification, Host-Parasite Interactions and Molecular Biology. Special Issue of the journal Pathogens . MDPI. ISBN 978-3-7258-5606-0

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Abstract

In aquaculture and fisheries, maintaining fish health is crucial for sustainable production, ensuring food security and supporting the economic viability of these industries. Parasitic diseases present a significant challenge, often leading to reduced growth rates, increased mortality, and compromised fish quality. These impacts can result in substantial economic losses for the fish farmers and fishery operations. Beyond the immediate economic effects, parasitic infections can also disrupt the balance of aquatic ecosystems, as infestations may spread to wild fish populations, altering species interactions and potentially reducing biodiversity. Effective management and control of parasitic diseases are therefore essential to the long-term success and sustainability of aquaculture and fisheries. This Reprint compiles a series of insightful chapters originally published in the Special Issue of the journal Pathogens by MDPI publishers. These chapters explore various aspects of parasitic diseases in fish, ranging from the identification of specific parasites to the intricate host–parasite interactions and the application of molecular biology in understanding these relationships. The content spans a broad spectrum of parasitic groups, including protozoans, dinoflagellates, myxozoans, trematodes, copepods, and leeches, addressing specific research problems. Additionally, the Reprint addresses related topics such as the impact of environmental factors on parasitic infections and innovative approaches for disease management. By bringing together these diverse studies, this volume aims to serve as a valuable resource for researchers, educators, and professionals engaged in the study and management of fish health. We express our deepest gratitude to all the authors who contributed their exceptional work to the Special Issue in Pathogens. Their dedication, expertise, and insights have been instrumental in the creation of this comprehensive volume on parasitic diseases in fish. Without their contributions, this Reprint would not have been possible. We also extend our sincere thanks to the Editor-in-Chief and handling staff from Pathogens for their guidance and meticulous oversight throughout the publication process. Their commitment to maintaining the highest standards of scientific rigor has greatly enriched this collection. Additionally, we acknowledge the invaluable efforts of our reviewers, whose critical evaluations have enhanced the quality and clarity of each chapter. We are also grateful to our colleagues and institutions for their unwavering support, and to the broader scientific community for fostering an environment of collaboration and knowledge-sharing. It is our hope that this Reprint will serve as a vital resource for researchers, educators, and practitioners in the field of fish health, inspiring ongoing research and innovation in combating parasitic diseases in fish.

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