Case Study

Phase 1 - AquaVet Clinical Evaluation Gyrodactylus spp

Evaluation Prepared By

 

Dr. Ra'anan Ariav - AquaVet Technologies Ltd.

 

Installed Unit

 

HydroFLOW HS40.

 

Background 

 

This clinical evaluation has monitored the effect of the HydroFLOW water disinfection system on Gyrodactylus spp.

As such, we evaluated the following parameters:

  • Gram () Bacterial pathogens of fish.
  • Total Bacterial counts in water.

  • Morbidity rate.
  • Mortality rate.  

 

Protocol 

 

  • Four (4) Lg. Tanks (10 cubic Meters each) were re-circulated for a period of 90 Days in the Aquavet Wet-Lab facility.

 

  • Tank 2 and 3 (DISEASE RESEVOIRS) - were stocked with 300 Hybrid Tilapia (each) characterized by heavy of Bacterial, Fungal and Parasitic Infection.

 

  • Tank 1 (positive control) and tank 4 (negative control) - were stock with 300 Hybrid Tilapia (each), free of infectious disease. These tank were also treated with 2 consecutive treatments of Formalin (FormaldagG) and Naied 150 (Bromex®) at the recommended doses in order to eliminate any presence of Parasitic pathogens prior to the beginning of recirculation and were treated with medicated feed. 

 

  • The HydroFLOW unit was installed on tank 4 water feed, which was the comrtol tank. Tank 4 was also feeding water to tank 3 (disease reservoir)

 

Results

 

  • Overall survival rate in tank 4 (HydroFLOW treated in coming water) was considerably higher (74%) when compared to survival rate in tanks 1, 2 and 3 (60%,48% and 42%).

 

  • Tilapia population in tank 4 (HydroFLOW Treated incoming water) exhibited increased survival rate and improved health as expressed by lower level of bacterial, parasitic and mycotic infection.

 

  • During the majority of the observation period, we recognized a clear effect on prevention of disease transmission parasitic, mycotic, bacterial pathogens of fish).

 

 

For the full evaluation report please click on the PDF.