Volume 17, Issue 2 (Summer 2025)
3 2025, 17(2): 52-63 |
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Soltani M, Azizzadeh M, Abdi K, Farshgar R, Asadi S. Study of bacterial diseases with significant economic in fared rainbow trout (Onchorhynchus mykiss) in Hamedan, Chaharmohal-va-Bakhteyari, Kohgiloyeh-va-Boerahmad, Fars and Zanjan provinces of Iran. 3 2025; 17 (2) :52-63
URL: http://jmb.ahvaz.iau.ir/article-1-1022-en.html
URL: http://jmb.ahvaz.iau.ir/article-1-1022-en.html
Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Iran & Harry Butler Institute, School of Veterinary Medicine, Murdoch University, WA, Australia
Abstract: (56 Views)
The annual outbreaks of bacterial diseases cause high economic losses in the aquaculture sector. Thus, study of bacterial diseases which are economically important in some commercial fish species such as rainbow trout required an important consideration. In the present study the outbreak status by economically important bacterial diseases was assessed in farmed rainbow trout in provinces of Hamedan, Chehrmohal-va-Bakhteyari, Kohgiloye-va-Boerahmad, Fars and Zanjan. Samples of affected fish were cultured on the appropriate media and the grown colonies were processed for further identification of bacterial genus and species by molecular methods. The obtained data showed that the relative frequencies (RF) for streptococcosis caused by Streptococcus iniae, S. agalactiae, and S. dysgalactiae, lactococcosis caused by Lactococcus garviae, yersiniosis caused by Yersinia ruckeri, and aeromonasis caused by Aeromonas hydrophila were 12.92%, 19.62%, 3.35%, 24.4%, 28.23%, and 8.61, respectively. In trout farms of all studies provinces the highest RF was due to yersiniosis, while the lowest RF was due streptococcosis caused by S. dysgalactiae. Secondly, depending on the health management conditions particularly based on the present/absent of stressor factors, the RF of each bacterial disease was different among the studied provinces. These finding results showed that farmed rainbow trout in these provinces are suffering from the outbreaks by these bacterial diseases that can cause severe economic loss in Iran trout aquaculture industry.
Type of Study: Research |
Subject:
Special
Received: 2025/05/11 | Accepted: 2025/06/28 | Published: 2025/06/28
Received: 2025/05/11 | Accepted: 2025/06/28 | Published: 2025/06/28
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