Journal of aquatic animal health

01 16 September 2026

DOI 10.1093/jahafs/vsag013

Under pressure: Use of hyperbaric chamber therapy for management of dissolved gas disorders in fish—15 cases (2015–2025)

Open DOI

Brian J Anton, Andrew L Smith, Jesus Diaz Bujan et al.

Objective: Our objective was to describe clinical findings, treatment protocols, and outcomes in captive fish presenting with ocular and/or buoyancy disorders attributed to dissolved gas disease undergoing novel treatment with hyperbaric...

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02 2 September 2026

DOI 10.1093/jahafs/vsag014

Evaluating functional effects of dietary phytogenic product supplementation in Nile Tilapia through performance, immunity, gene expression, and resistance to Flavobacterium oreochromis

Open DOI

Ishini A Appuhami, Krishna Pada Singha, D Allen Davis et al.

Objective: Phytogenics, which are plant-derived compounds, are increasingly gaining importance in aquaculture as sustainable and natural feed additives that support the performance and health of cultured fish. The current study evaluated...

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03 17 August 2026

DOI 10.1093/jahafs/vsag012

Notable bacterial diversity isolated from naturally infected fish in an understudied region of Pakistan

Open DOI

Muhammad Rauf, Shandana Ali, Richard Daniel et al.

Objective: The aquaculture sector in Pakistan remains underdeveloped, as aquaculture has not yet received adequate attention. Studies focusing on the health status of fish in the natural water bodies within Pakistan are rare. Methods: Th...

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04 27 July 2026

DOI 10.1093/jahafs/vsaf002

Establishment of quantitative PCR detection methods and epidemiological investigation of ranavirus and megalocytivirus infections in hybrid snakehead (Northern Snakehead ♀ × Blotched Snakehead Channa maculata ♂)

Open DOI

Jiahao Zhang, Wenhao Wu, Caiyi Wen et al.

Objective: In China, the incidence of iridovirus infections in economically valuable fish species is increasing, but there is a paucity of reports documenting ranavirus infections and there are no reports concerning megalocytivirus in hy...

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05 27 July 2026

DOI 10.1093/jahafs/vsag010

Assessing a semi-validated quantitative PCR for high-throughput surveillance of Ichthyophonus sp. in Yukon River Chinook Salmon

Open DOI

Jayde A Ferguson, Davis J Stewart, Franklin R Woitel et al.

Objective: We sought to determine the suitability of a semi-validated quantitative PCR (qPCR) assay for assessing the prevalence and density of Ichthyophonus sp. infections in Yukon River Chinook Salmon Oncorhynchus tshawytscha, represen...

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06 24 July 2026

DOI 10.1093/jahafs/vsag011

New culture medium enhances the isolation and culture of Flavobacterium psychrophilum , causative agent of bacterial coldwater disease and Rainbow Trout fry syndrome

Open DOI

Christopher Knupp, Sean M G Lennox, Esteban Soto et al.

Objective: Flavobacterium psychrophilum causes bacterial coldwater disease (BCWD) and Rainbow Trout fry syndrome (RTFS) in salmonids, resulting in significant economic losses worldwide. Bacterial culture remains a widely used method for ...

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07 15 July 2026

DOI 10.1093/jahafs/vsag008

Susceptibility of Nile Tilapia Oreochromis niloticus fingerlings to different Lactococcus petauri genotypes isolated in the USA

Open DOI

Yoandy Coca, Zeinab Yazdi, Eileen Henderson et al.

Objective: In this study, the pathogenicity of two genetically distinct Lactococcus petauri strains, one isolated from catfish Ictalurus spp. in Alabama, USA, belonging to sequence type 142, and one from Rainbow Trout Oncorhynchus mykiss...

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08 13 July 2026

DOI 10.1093/jahafs/vsag004

Effects of a low-lipid diet on the gut microbiome and head kidney transcriptome of juvenile Chinook Salmon

Open DOI

Claire E Couch, Konstantin Divilov, Crystal L Herron et al.

Objective: Pacific salmon Oncorhynchus spp. reared in production hatcheries are typically fed high-lipid, energy-dense diets to achieve large size and high body condition prior to release. In contrast, juveniles in natural environments t...

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09 10 July 2026

DOI 10.1093/jahafs/vsag009

Passive immunization with anti-virulent Aeromonas hydrophila whole serum protects Channel Catfish against motile Aeromonas septicemia

Open DOI

Allison L Wise, Benjamin H Beck, Troy J Bader et al.

Objective: Recently, we demonstrated the efficacy of oral bacterin virulent Aeromonas hydrophila (vAh) vaccines (S14-452 and ML09-119) in Channel Catfish Ictalurus punctatus, but gaps in knowledge exist with respect to protective immunit...

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10 9 July 2026

DOI 10.1093/jahafs/vsag006

Discovery of Citrobacter freundii as a disease-causing agent in Singhi Heteropneustes fossilis : A first report

Open DOI

Lija Ghosh, C Laltlanmawia, Himadri Saha

Objective: The purpose of this study was to identify and describe Citrobacter freundii, which was associated with a disease outbreak in Singhi (also known as Stinging Catfish) Heteropneustes fossilis that are cultured under intensive fre...

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