Gerald Bassleer presents a short video summarizing a study that tested using formalin to disinfect Tubifex worms (used as live feed) to remove Aeromonas pathogens before feeding to catfish. The study used both in vitro and in vivo assays with pangasius; an immersion at 400 ppm formalin followed by two rinses inhibited Aeromonas, did not kill the Tubifex, and improved pangasius survival over a 14‑day rearing period.
Chapters
Hello. Dear Akrist, a study about the use of tubefix where the tube effects can be, how can I say be eliminating from Aeromonas bacteria, because we know Tubifix has a risk of introducing infections to the fish because Duplifix can carry pathogenic bacteria or parasites or other things. And here this specific study was done how can we eliminate pathogenic bacteria? And they used Aeromona septicemia to check if it was possible to eliminate those bacteria from tube effects before it has been fed to fish. Now here the fish that has been used were pangasius in a culture system. And I know many of us are using still tube effects. And some people, well, leave the tubifex for a couple of days, washing it out and cleaning it. So all the dirt is out. So they are pure tubifex worms. But still there can be a risk of pathogens that are carried by the tube fix. And I want to share with you here the findings of this study and the experiment that has been done with the use of formalin. And I give you the aims here of the study in yellow. This study aimed to evaluate the effectiveness of formalin in suppressing Hyrumonas hydrophila and Tubifex worms, which are used as a natural feed for larval catfish Pangasius. In this study, the research was conducted in two in vitro, that means in the laboratory and in vivo assays, that means on real catfish from the farm and to see how the catfish Pangasia survived or did well. And the result of the study was that it demonstrated that 400 parts per million formalin concentration was effective in inhibiting the growth of Aeromonas. And the treatment, which was done by two rinses following an immersion in 400p ppm formalin. So the tube effects were immersed significantly reduced the toxic effect of formalin on the tubifex worm as a natural feat. So the worms were not killed and the Aeromonas were inhibited. So they showed also that it improved also the survival rate of the catfish because some of the catfish were suffering from from a bacterial infection. So they had in general reaching a large percentage rate 44 over a 14 day rearing period. So this is the basic idea of using formalin on the tube effecture and rinsing it out twice. And the details are listed in this article, the introduction, the methods, the essay in vitro and in vivo. So they treated different parts to see if there was inhibition in the plates. So a lot of interesting material. If you want to know more about it, go for it yourself. I will give the link below of the article if you want to learn more about it. But it's something interesting to understand that the use of formalin can be interesting to eliminate bacteria from the tube effects, maybe also some parasites, I don't know. It's not studied in this article. These are the conclusions then made. Like I said before, that this method was not so toxic to the Tubifexorum and it inhibited the growth of the Ayuromonas. So this is something I wanted to share with you and I hope it teach you a lesson that you can use tube effects on a safe way, particularly for breeders. An important message. Thank you for watching.
