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Hi, normal practice would be to focus on surfaces known to be contaminated, using 0.2% chlorine solution for walls, floors, beds, shoes etc. that may have been shat or vomited on and 0.5% solution for contact with skin. I can't cite the evidence, but chlorine at these concentrations is an extremely effective disinfectant and it would certainly reduce the numbers of vibrios drastically.

General spraying as a preventive measure would not be advised, as John Cosgrave points out.

John A.