Upload
ashraf-refaat
View
223
Download
0
Embed Size (px)
Citation preview
8/4/2019 Air Disinfection
1/24
Media-Specific Disinfection
Surfaces and Air
8/4/2019 Air Disinfection
2/24
8/4/2019 Air Disinfection
3/24
Legal Issues
1) It is a violation of Federal law to use an EPAregistered product in a manner inconsistent with itslabeling. Solution strength must be according to label
Applications must be on the label
2) It is a violation of Federal law for a manufacturer tomake real or implied claims for efficacy againstorganisms which are not on the label.
Creates problems when we encounter: FMDV
Anthrax
Norwalk
SARS
Avian Influenza H5N1
8/4/2019 Air Disinfection
4/24
Surface Disinfection = Inactivation in Place
Surface Cleaning = Removal of Contaminants
Commercial products frequently combine disinfectionand cleaning.
Some disinfectants have cleaning properties
Recommendation (at least in clinical settings) cleanwith disinfectant to avoid spreading contamination
Pre-Disinfect Clean Disinfect
Surface Disinfection
8/4/2019 Air Disinfection
5/24
Surfaces
What surfaces might you need to disinfect?
Household Surfaces
Food and Food Prep Surfaces
Clinical Surfaces
Laboratory
Industrial
Farm
Other???
8/4/2019 Air Disinfection
6/24
Concerns for Disinfection of Surfaces
Disinfectant Type/Concentration/Formulation
Contact Time
Type of Organisms/Level of Disinfection
Corrosivity and Other Surface Damage
Toxicity/Residual Toxicity
Other Residues
Odor
Type of Application and Rate
8/4/2019 Air Disinfection
7/24
Concerns for Disinfection ofSurfaces
pH Demand and Interfering Substances Temperature
Water hardness Soil load Biofilm presence Surface microtopography
Precleaning Relative humidity Compatibility Storage of Product/Product age
8/4/2019 Air Disinfection
8/24
Clinical/Dental Surface Disinfectants
8/4/2019 Air Disinfection
9/24
Farm Surfaces
Virkon S (potassium peroxymonosulfate)
Nolvasan S (chlorhexidine diacetate)
Bleach (sodium hypochlorite) Spectrasol (quat)
Alcohols (ethanol and Isopropanol, 70-95%)
Roccal D (quats with bis-n-tributylin oxide)
8/4/2019 Air Disinfection
10/24
Surface Disinfection
In study by CRA Foundation
54 clinical surface disinfectants tested against TB andPolio with and without presence of Blood
7 passed:
Household Chlorox (50:50)
Industrial Chlorox (50:50)
Biosurf Lysol I.C.
Lysol II Spray
Indi-wipes with Lysol
8/4/2019 Air Disinfection
11/24
Ozone Surface Disinfection
Up to 14 PPM Ozone@ 10GPM
Onboard OzoneAnalyzer With Alarms
Exclusive Off-GassingSystem
Spray, Mist and FogApplicators; Spray
Arches Available Advertises a 3 Log Kill
on First Application
8/4/2019 Air Disinfection
12/24
UV Surface Disinfection
Conveyor Belts Food Prep Surfaces
Laboratory andClinical Surfaces
Sterilization ofPackaging
Mail Systems
8/4/2019 Air Disinfection
13/24
Cleaning and Disinfection ofFloors
% Reduction
Soap and water 80.4%
Phenol 99.0%
8/4/2019 Air Disinfection
14/24
Microbial Contamination of MopWater
Soap(CFU/ml)
Phenol(CFU/ml)
Before cleaning 10 20
After cleaning one-third of ward
650 10
After cleaning two-thirds of ward
15,000 30
After cleaningcomplete ward
34,000 20
8/4/2019 Air Disinfection
15/24
Disinfection of Food Surfaces
8/4/2019 Air Disinfection
16/24
Chemical disinfection of Indoor Air
Spraying relatively large particles,
which have a higherwetting capacity, but stay inthe air for less time
Misting
smaller particles that haveincreased penetration anduniformity
Fumigation combination of 2 or more
chemicals producing a
vaporised form of thedisinfectant
Thermal Fogging similar to misting but
involving heating of thedisinfectant to produce a
fine vapour
8/4/2019 Air Disinfection
17/24
Chemical Disinfectants of Air
Chlorine Dioxide
Ozone
VHP
Formaldehyde
Gluteraldehydes
Quat mixtures
Virkon (peroxy compound)
Sporocidin (phenolic)
http://www.minntech.com/ftg/products/microfiber/minncare_bg.html8/4/2019 Air Disinfection
18/24
Air Disinfection
Chemical Disinfection
Spray, mist, fog, fumigation
UVGI
Ionization/Electrostatic Precipitation
Only one that removes
Photocatalytic oxidation
8/4/2019 Air Disinfection
19/24
8/4/2019 Air Disinfection
20/24
8/4/2019 Air Disinfection
21/24
UV Air Disinfection
Forced Air or HVAC DuctSystems
Full Air Systems
Upper Air Systems
Re-circulating Systems
Microbial Growth Control On Filter Surfaces
8/4/2019 Air Disinfection
22/24
UV Air Disinfection: Duct Systems
Integrated in to HVAC System
8/4/2019 Air Disinfection
23/24
UV Air Disinfection: Upper Air
Originally designedfor TB sanitariums
8/4/2019 Air Disinfection
24/24
UV Air Disinfection: MGS