Disinfectant Sprays and Vapours

Disinfectant Sprays and Vapours

Disinfectant Sprays and Vapours
Earlier, carbolic spray was introduced by Lister. Sulphurous acid and formalin vapours are occasionally still used for terminal disinfection in hospitals but they are highly irritating to the respiratory passage. Finding by Douglas et al was very promising where it was possible to destroy the cells of E.coli in the atmosphere by means of sodium hypochlorite solution sprayed into the air in very high dilution. After a lot of research, spraying of 1 % sodium hypochlorite solution at a concentration of 1-5/ million parts in air was agreed upon.

Other materials of spray include, resorcinol, propylene glycol, triethylene glycol and ozone but none of them have proved their worth. Ozone and 2.5 % of hydrogen peroxide playa very important role in air disinfection since they can kill cells of Salmonella typhi most effectively. To both UV light and disinfectant vapours, gram-negative bacilli are more susceptible than gram positive organisms. Microorganisms are harder to kill when dried onto dust particles than when they are in the form of droplet nuclei.

Microbes and Atmosphere Part-2
Potential Hazards in Laboratory Techniques
Hazardous Procedures in the Lab
Airborne Diseases
Modes of Transmission
Direct Droplet
Direct Airborne
Indirect Airborne
Bacterial Diseases of the Upper Respiratory System
Viral Diseases of the Upper Respiratory System
Bacterial Diseases of the Lower Respiratory Tract
Viral Diseases of the Lower Respiratory Tract
Air Sanitation
Ventilation
Safety Cabinets
Disinfectant Sprays and Vapours

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