CS>Rephrasing question -- resistance to CS

[Judy Knowlton]

Are we producing one-cell “buglets” (virus, bacteria, yeast, fungus) that are 
highly resistant to CS?
I had understood from this List that CS works differently and resistance is not 
possible.
My son is having an experience that might say otherwise.
Please, you research Mavens, clarify!
Judy Down Maine