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Media-Specific Disinfection. Surfaces and Air. Legal Issues. 1) It is a violation of Federal law to use an EPA registered product in a manner inconsistent with its labeling. Solution strength must be according to label Applications must be on the label

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legal issues
Legal Issues

1) It is a violation of Federal law to use an EPA registered product in a manner inconsistent with its labeling.

  • Solution strength must be according to label
  • Applications must be on the label

2) It is a violation of Federal law for a manufacturer to make real or implied claims for efficacy against organisms which are not on the label.

  • Creates problems when we encounter:
    • FMDV
    • Anthrax
    • Norwalk
    • SARS
    • Avian Influenza H5N1
surface disinfection
Surface Disinfection
  • Surface Disinfection = Inactivation in Place
  • Surface Cleaning = Removal of Contaminants
  • Commercial products frequently combine disinfection and cleaning.
  • Some disinfectants have cleaning properties
  • Recommendation (at least in clinical settings) clean with disinfectant to avoid spreading contamination

Pre-Disinfect  Clean  Disinfect

surfaces
Surfaces
  • What surfaces might you need to disinfect?
    • Household Surfaces
    • Food and Food Prep Surfaces
    • Clinical Surfaces
    • Laboratory
    • Industrial
    • Farm
    • Other???
concerns for disinfection of surfaces
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
concerns for disinfection of surfaces7
Concerns for Disinfection of Surfaces
  • pH
  • Demand and Interfering Substances
  • Temperature
  • Water hardness
  • Soil load
  • Biofilm presence
  • Surface microtopography
  • Precleaning
  • Relative humidity
  • Compatibility
  • Storage of Product/Product age

*In practice, the contaminating microorganisms are not usually known.

farm surfaces
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)
surface disinfection10
Surface Disinfection
  • In study by CRA Foundation
    • 54 clinical surface disinfectants tested against TB and Polio 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
ozone surface disinfection
Ozone Surface Disinfection
  •   Up to 14 PPM Ozone @ 10GPM
  •   Onboard Ozone Analyzer With Alarms
  •   Exclusive Off-Gassing System
  •   Spray, Mist and Fog Applicators;   Spray Arches Available
  • Advertises a 3 Log Kill on First Application
uv surface disinfection
UV Surface Disinfection
  • Conveyor Belts
  • Food Prep Surfaces
  • Laboratory and Clinical Surfaces
  • Sterilization of Packaging
  • Mail Systems
chemical disinfection of indoor air
Chemical disinfection of Indoor Air
  • Spraying
    • relatively large particles, which have a higher wetting capacity, but stay in the air for less time
  • Misting
    • smaller particles that have increased penetration and uniformity
  • Fumigation
    • combination of 2 or more chemicals producing a vaporised form of the disinfectant
  • Thermal Fogging
    • similar to misting but involving heating of the disinfectant to produce a fine vapour
chemical disinfectants of air
Chemical Disinfectants of Air
  • Chlorine Dioxide
  • Ozone
  • VHP
  • Formaldehyde
  • Gluteraldehydes
  • Quat mixtures
  • Virkon (peroxy compound)
  • Sporocidin (phenolic)
air disinfection
Air Disinfection
  • Chemical Disinfection
    • Spray, mist, fog, fumigation
  • UVGI
  • Ionization/Electrostatic Precipitation
    • Only one that removes
  • Photocatalytic oxidation
uv air disinfection
UV Air Disinfection
  • Forced Air or HVAC Duct Systems
  • Full Air Systems
  • Upper Air Systems
  • Re-circulating Systems
  • Microbial Growth Control
    • On Filter Surfaces
uv air disinfection duct systems
UV Air Disinfection: Duct Systems
  • Integrated in to HVAC System
uv air disinfection upper air
UV Air Disinfection: Upper Air
  • Originally designed for TB sanitariums