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Quiz: Environmental Disinfectants

Brandy A. Burgess, DVM, MSc, PhD, DACVIM (LAIM), DACVPM, University of Georgia

Preventive Medicine

|May 2017|Peer Reviewed|Web-Exclusive

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Excellent patient care cannot be realized without consideration for infection control in the practice of veterinary medicine. Environmental contamination is commonly reported in association with epidemics of healthcare-associated infections. Because the environment can play an important role in infectious disease transmission, it is critical that hospital personnel have a working understanding of the cleaning and disinfection process, including commonly used disinfectants. Appropriate cleaning and disinfection can disrupt the chain of transmission, thereby protecting staff, patients, and the hospital environment from zoonotic and healthcare-associated infections.

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Biosecurity Quiz: Environmental Disinfectants

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The purpose of cleaning and disinfection is to reduce any potential environmental contamination to an acceptable level.

Which has the greater impact on reducing surface contamination?

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Biosecurity Quiz: Environmental Disinfectants
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Cleaning and disinfection involve a multistep process.

Which of the following is the appropriate order of steps?

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Disinfection is a chemical reaction. 

Which of the following factors may impact this reaction and thus affect the efficacy of a disinfectant (ie, ability to inactivate or kill infectious agents)?

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Biosecurity Quiz: Environmental Disinfectants
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A clinician is faced with using a disinfectant in the presence of organic debris and understands that this debris can inactivate all disinfectant classes but does so for some more than others.

Which of the following pairs of disinfectants represents the least effective and the most effective agents, respectively, in the face of organic debris?

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Biosecurity Quiz: Environmental Disinfectants
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Infectious agents differ in their susceptibility to chemical disinfectants.

Which of the following selections accurately ranks agent types from most susceptible to least susceptible to chemical disinfection? 

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Products containing QACs, which are effective against vegetative bacteria and enveloped viruses, are commonly used for routine disinfection in healthcare settings. However, other disinfectants may be better able to mitigate additional agents of concern in a veterinary hospital environment.

Which of the following classes of chemical disinfectants should be used for environmental disinfection of parvovirus?

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Biosecurity Quiz: Environmental Disinfectants
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Biosecurity Quiz: Environmental Disinfectants

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