Though its a potential bocontrol agent its human pathogenicity is a question as it induces septecemia. So there are other alternative with P. Fluorescens and P, chloraphis

P.aeruginosa causes intestinal infection such as diarrhea in infants and many individuals if ingested with contaminated food. The infectious dose depends on immunity status of each person. The oral infectious dose is high, the greatest health risk comes from skin and lung exposure. (Mena, K. D., & Gerba, C. P. (2009). Risk assessment of Pseudomonas aeruginosa in water. Reviews of Environmental Contamination and Toxicology, 201, 71-115). I guess that large-scale use of P.aeruginosa as biocontrol agent is risky, even if you find avirulent strains. Safe bacteria must have removed all known virulence genes, but it will not guarantee complete loss of pathogenicity, because own knowledge of bacterial virulence is still limited.

Thanks Alex for the answer. I also wanted to know about the regulatory issues at the government level.

Naveen, I can say only about local rules: Pseudomonas aeruginosa is in the group of III-IV level of biological hazard microbes, and only institutions certified to work with human/animal pathogens can keep such strains and work with them.   I will estimate a chance to register Pseudomonas aeruginosa as biocontrol agent in Russia as 1:100

OK, thanks Alex.

It's long known as an excellent organism; however it's an opportunistic pathogen.  I appreciate all the comments

maybe try some temp sensitive mutants that can't grow at body temperature.

They are easy to make, and the rate of back mutation is easy to determine.

almost never say never