Disinfectants4-H Veterinary ScienceExtension Veterinary MedicineTexas AgriLife Extension ServiceCollege of Veterinary Medicine and Biomedical ScienceTexas A&M Systemhttp://aevm.tamu.edu

ObjectivesDescribe types of chemical disinfectantsDiscuss proper handling of chemical disinfectantsDiscuss proper disinfection procedures

DisinfectantsChemical compounds applied to inanimate surfaces to reduce or eliminate pathogenic microorganisms

DisinfectionAct or process of destroying pathogenic organisms

Pathogens to disinfect forBacteriaVirusesFungi

Possible surfacesTablesFeeding and watering equipmentCagesStalls

Handling Techniques Wear rubber glovesIrritantsFollow directionsNot too strongStore properlyRoom temperatureDarkNontransparent containersDispose of properly

ProceduresClean surfacesBloodManureSoilPusCracks in surfaceNo admittanceAnimals

Classes of DisinfectantsFive classesAlkaliesChlorineFormaldehydeQuaternary ammoniumPhenol

AlkaliesHigh pHProblemsSkin irritationRemove animalsUses2% solution lye soil & rubber bootsExamplesLyeLimeSodaPotash

ChlorineBleaching agent / disinfectantHigh concentration of chloride ionProblemsDegrades on exposure to lightOffensive odorUses.05% to .2%

FormaldehydeGas like chlorineSolution called formalinProblemsOffensive odorUses5% - disinfects rubber boots, feed and watering utensils

Quaternary AmmoniumEffective on clean hard surfacesUses1:1000 to 1:5000BenefitsAcceptable odorsNon-irritatingCommonly used by veterinarians

PhenolCalled cresol as disinfectantUses2% solution ground and hard surfacesProblemsOffensive odorIrritantCorrosive