Furunculosis control using a paraimmunization stimulant (Baypamun) in rainbow trout

Area of Science:

• Aquatic animal health
• Immunology
• Fish disease management

Background:

• Furunculosis is a significant bacterial disease affecting farmed fish globally.
• Non-specific immune stimulants offer a potential strategy for disease control in aquaculture.
• Rainbow trout are susceptible to Aeromonas salmonicida, the causative agent of furunculosis.

Purpose of the Study:

• To evaluate the efficacy of Baypamun, a non-specific immune stimulant, in treating and controlling furunculosis in rainbow trout.
• To assess the impact of Baypamun on clinical signs, infection levels, and mortality rates.
• To explore the potential of immune stimulants as a future defense strategy in aquaculture.

Main Methods:

• Experimental infection of rainbow trout with Aeromonas salmonicida.
• Administration of Baypamun as a treatment.
• Monitoring of clinical symptoms, bacterial load in blood and organs, and mortality rates.
• Statistical analysis of the collected data.

Main Results:

• Baypamun treatment showed a statistically significant reduction in the cumulative incidence of furunculosis clinical symptoms.
• A significant decrease in the overall infection level was observed in Baypamun-treated fish.
• While mortality rates were reduced in the treated group, the difference was not statistically significant.
• Bacteria were detected in the blood and organs of treated fish, indicating subclinical infection.

Conclusions:

• Baypamun demonstrates potential in reducing furunculosis severity and infection levels in rainbow trout.
• Non-specific immune stimulants may serve as a valuable tool for managing fish diseases and controlling asymptomatic carriers.
• Further research is warranted to optimize the use of immune stimulants in aquaculture for enhanced disease resistance.