I do not think this will be a good idea. Some pseudomonas strains are probiotics for plants but others can be pathogens of human and fishes. 

Dear Nathalie,

I agree with you, but i have requested a journal from Mr. Hai Ngo about using Pseudomonas aeruginosa as a probiotic for prwan . Perhaps he can explain its posibble or not to use P. aeruginosa as a probiotic for fishes.

This is following link:

Article Effects of probiotics (Pseudomonas synxantha and P. aerugino...

In a research in 2009 by Abd El-Rhman AM, Khattab YA, Shalaby AM. On the topic ‘‘Micrococcus luteus and Pseudomonas species as probiotics for promoting the growth performance and health of Nile tilapia, Oreochromis niloticus’’. They recommended the use of M. luteus as a probiotic in vivo, while Pseudomonas species should be used as a probiotic in vitro only. Pseudomonas as we know is an opportunistic pathogen and so care must be taken in its use as a probiotic.

Moreover, it is difficult to get rid of Pseudomonas from the system once introduced as their sturdy and resistant to antimicrobials. 

Interesting it is Dr. Ali.

I guess further studies are required to research the exact role played by Pseudomonas. 

You can use Pseudoalteromonas as a probiotic for aquaculture.

Why not using Carnobacterium?                                          http://www.ncbi.nlm.nih.gov/pubmed/23762761 http://www.ncbi.nlm.nih.gov/pubmed/17696886

Dear Mr David Olugbenga Adetitun,

Thanks for the information. Now the problem is, how we can use this bacteria (Pseudomonas) as a probiotic for fish ( Tilapia) without take a risk? Because some food from fish product like sashimi, it is fresh fish flash without fried or cooked. I am worried that bacteria still alive.

so, Probiotic in fish, but pathogen in human... 

Dear Mr David Olugbenga Adetitun,

Thanks for the information. Now the problem is, how we can use this bacteria (Pseudomonas) as a probiotic for fish ( Tilapia) without take a risk? Because some food from fish product like sashimi, it is fresh fish flash without fried or cooked. I am worried that bacteria still alive.

so, Probiotic in fish, but pathogen in human...

Dear Mr Godfred A Menezes,

I agree with you, i have tought that not all cases of pathogenity bacteria from fish product to human happened from environment. I think it can happened from fish itself that adding by bacteria as probiotic for fish but pathogen for human. We need to make sure that all fish product must clear from bacteria even though its probiotic for fish.

Dear Dr. Ali,

Thanks for your information, i will study this journal.

Dear Adelaide,

Thanks for your information, by the way, what the function of Pseudoalteromonas for aquaculture?

Dear Ami,

Thanks for your advice,

But nowadays, the competition of aquaculture are more tight and strict. Many people tried to boost Fish or Shrimp growth with all of ways, one of them is from adding probiotic. I think we can adding controversial probiotic like Bacillus and Pseudomonas ( for Enterococci i dont know further) for fish or shrimp goodness, but we must have ways to make sure that bacteria cant reach our body by eat fish product. i think if we can find the way, it will be okay if we use those kinds of bacterias for probiotics. 

Pseudomonas is normally a pathogen, so will never find regulatory approval down the line in developing such additive. But in pure research never say never.Because it should be posssible to find some non-pathogenic strains, since we know variation is the beauty of nature. In such a case multi-disciplinary approach is needed such that microbial geneticists, clinicians, biological chemists and aqua nutritionists  are scooping out the possiilities. A repertoir of studies including how the body might handle them still need to be done on the safety of such potential additives. A project of about 5 to 10 years should shed light on these issues. Good luck.

I would not recommend using bacteria from the genus Pseudomonas.  Most successful probiotic cocktails seem to use gram positive bacterial strains.  A genus that has produced good results is Bacillus.  If I were to pick any group of bacteria to try it would be this one.  Another thing you may consider is more of a prebiotic approach where you add compounds to encourage the proliferation of certain microbial groups rather than adding those microbes directly.  This can have a greater impact with a much lower cost.  I routinely add sucrose to my shrimp systems which has resulted in consistently good water quality and production.  See the attached paper by Zhao et al. which describes sucrose addition resulting in the proliferation of Bacillus sp.

And what about to test pathogenicity of these strains? For instance E. coli is generally pathogen. But str. Nielse is probiotic for suckling yet. But with Pseudomonas you can’t be too careful; because of they are very clever, with high abilities of adaptation (livability).Good lack!

Dear Mr David,

Thanks for your attention, i agree with you. We should do a lot of research to determined the function and the risk to use bacteria, because we know there are so many variety of bacteria in this world.

Dear Mr Andrew,

Thanks for your suggestion,

As we know that Pseudomonas has a controversial debut. I agree with you, its better we do not use Pseudomonas for healthy reason. But, some researcher have found that Pseudomonas effectively  for prawn's growth. It means, behind the patogenity of Pseudomonas, we can find beneficial function from this bacteria. More we find beneficial bacteria for shrimp or prawn, more we have optimal result, don't we? I think we can manipulate the population between Pseudomonas and another bacteria in a probiotic concortium. So we can control Pseudomonas securely. It means that we stil need a lot of informations about this genus, Pseudomonas. 

Dear Mr Vladimir,

Thanks for the information,

Like Mr David opinion, yes, there are a lot of variety of bacteria in this world. Perhaps we can find another strain of Pseudomonas that not pathogen for human but has beneficial for shrimp (because Pseudomonas is generally pathogen too), but takes many times to build a research about it. So we need to consider "by pass" way to use the beneficial of Pseudomonas securely. 

Dear Jeremia,

We have used  two Pseudomonas sp. strains as probiotics for rainbow trout  fry and fingerlings and as protective cultures for rainbow trout eggs. No increased mortality occured  after i.p. injection of the bacteria and increased disease resistance and immunological parameters were observed. I added the links to publications in JAM and our recent paper in press.  

Siderophore production of the Pseudomonas strains makes them good competitors in iron deficient waters. Some of the strains have antifungal effects, which makes them interesting alternative for traditional fungal treatments.

It is obvious that when there is almost two hundred different species in the genus Pseudomonas that there is also pathogenic species. I wouldn't use the P. aeruginosa or P. fluorescens, but would instead screen suitable Pseudomonas species from healthy fish /shrimp skin or intestine.  The strain identification and in vivo safety evaluation are naturally important part of the procedure of evalution of their potential as probiotics. 

The suggested Bacillus species are not trouble-free either due to their capacity for toxin production. At least in Europe,  European Food Safety Authority necessitates the testing the strains for cytotoxic effects by in vitro cell based methods.

Best regards,

Jouni

http://www.ncbi.nlm.nih.gov/pubmed/21554504

http://www.ncbi.nlm.nih.gov/pubmed/22548608

Yes you can....do it my bro