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Disinfectants 4-H Veterinary Science Extension Veterinary Medicine Texas AgriLife Extension Service College of Veterinary Medicine and Biomedical Science Texas A&M System http://aevm.tamu.edu
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Objectives Describe types of chemical disinfectants Discuss proper handling of chemical disinfectants Discuss proper disinfection procedures
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Disinfectants Chemical compounds applied to inanimate surfaces to reduce or eliminate pathogenic microorganisms Disinfection Act or process of destroying pathogenic organisms
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Pathogens to disinfect for Bacteria Viruses Fungi
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Possible surfaces Tables Feeding and watering equipment Cages Stalls
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Handling Techniques Wear rubber gloves Irritants Follow directions Not too strong Store properly Room temperature Dark Nontransparent containers Dispose of properly
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Procedures Clean surfaces Blood Manure Soil Pus Cracks in surface No admittance Animals
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Classes of Disinfectants Five classes Alkalies Chlorine Formaldehyde Quaternary ammonium Phenol
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Alkalies High pH Problems Skin irritation Remove animals Uses 2% solution lye – soil & rubber boots Examples Lye Lime Soda Potash
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Chlorine Bleaching agent / disinfectant High concentration of chloride ion Problems Degrades on exposure to light Offensive odor Uses.05% to.2%
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Formaldehyde Gas like chlorine Solution called formalin Problems Offensive odor Uses 5% - disinfects rubber boots, feed and watering utensils
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Quaternary Ammonium Effective on clean hard surfaces Uses 1:1000 to 1:5000 Benefits Acceptable odors Non-irritating Commonly used by veterinarians
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Phenol Called cresol as disinfectant Uses 2% solution – ground and hard surfaces Problems Offensive odor Irritant Corrosive
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