Fogging procedures are effectively used to decontaminate the rooms vacated by patients infected with staphylococci, streptococci, pseudomonads and Salmonella.
Glycols: Propylene glycol and triethylene glycol are active against streptococci, staphylococci, pneumococci, H. influenzae and influenza virus at a concentration 1:4 million. Their microbicidal activity is maximum at a temperature of about 27°C and a relative humidity of 45 - 70%.
The bactericidal activity of glycols are due to their hygroscopicity. When glycol molecules are atomized into the air they dissolve in the film of moisture surrounding each microorganism. At a particular concentration of glycol, the moisture inside the bacterial cell is drawn out of the cell and this leads to the death of the microbe.