الفهرس 
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Abstract
nosocomial infections occur worldwide and affect both developed and developing countries. Airborne associated infections represent one third of all nosocomial infections.
Operating rooms are classified into ultra-clean and clean operating rooms according to the type of their ventilation.
Operating room ventilation is essentially designed to reduce
airborne infection by removing or diluting airborne
microorganisms originating from the environment or operating
theatre staff.
It is important to assess the airborne contamination of
healthcare facilities when the maintenance of clean
environment is required. Evaluation of the air quality in
operating rooms can be performed routinely by
microbiological sampling and particle counting.
Chemical disinfectants are widely used in infection
control. Among the various disinfectants that satisfy most of
the requisites are hydrogen peroxide and its compounds. They
yield very good results in terms of disinfection efficacy and
seem to be able to replace the currently used substances that
are more problematic from a toxicological stand point.
In the current study, air and surface samples were
collected from fourteen operating rooms in El-Demerdash
University Hospital during February 2011, the studied rooms
were divided into three groups according to the applied
infection control measures. The samples were collected after
terminal cleaning, nebulization of Bafry, spraying of Bafry and
spraying of Huwa-San (one at a time).
A significant decrease in microbial air counts was
observed after the use of the two hydrogen peroxide formulas,
however, this decrease was greater with Bafry than Huwa-San.
There was no observed difference between the use of
Neburotor Europa and the Automist, however, the use of
Neburotor is better because the full automation of it decreases
the exposure of the workers to the disinfectants.