There's at least a couple of studies [1][2] showing benefits of using a probiotic cleaner containing B. subtilis, B. pumilus and B. megaterium
made by Belgian company Chrisal [3] over just using bleach for surfaces in a hospital setting. I first read about this in the book "I Contain Multitudes" which is about the microbiome.
From [1]: "This concept has been designated as biocontrol when the application is antagonistic towards a certain pathogen [26], and has already successfully been applied to the abatement of Legionella in water systems [27]."
From [1]: "This concept has been designated as biocontrol when the application is antagonistic towards a certain pathogen [26], and has already successfully been applied to the abatement of Legionella in water systems [27]."
[1] https://journals.plos.org/plosone/article?id=10.1371/journal... [2] https://journals.plos.org/plosone/article?id=10.1371/journal... [3] https://www.chrisal.com/about.php