15870968
Descripción
Test por Kelly Kinsinger, actualizado hace más de 1 año
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Creado por Kelly Kinsinger
hace alrededor de 6 años
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Pregunta 1
Pregunta
When using chemicals to kill microbes on surfaces, _________________ are for use on inanimate objects and _______________ are considered safe to use on living tissues.
Respuesta
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antiseptics, disinfectants
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disinfectants, antiseptics
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disinfectants, sterilizers
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antibiotics, disinfectants
Pregunta 2
Pregunta
A chemical is used to clean the surface of an examination table. The previous patient was a dog that has experienced chronic bouts of interdigital dermatitis. After examination, the veterinarian diagnosed Staphylococcal pyoderma with secondary infection by the fungus Malassezia. What type of disinfectant should you use to clean this table after the examination?
Respuesta
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A virucide and a bacteriostat
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A bacteriocide and a fungicide
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A parasitocide and a virucide
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A fungicide and a parasitocide
Pregunta 3
Pregunta
All of the following should be considered when choosing an ideal disinfectant except
Respuesta
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amount of tissue irritation or surface damage the chemical causes.
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ability of the chemical to become inactivated.
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how many microbes the chemical works against.
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how pleasant the chemical smells.
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the cost of the chemical.
Pregunta 4
Pregunta
Which of the following statements is true about alcohol as a disinfectant?
Respuesta
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Alcohol is effective in destroying Bacillus spores
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Alcohol is effective against nonenveloped viruses but worthless against enveloped viruses
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Alcohol is not effective as a broad-spectrum antibacterial
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Alcohol’s mode of action involves dissolving pathogen membranes and inactivating proteins
Pregunta 5
Pregunta
A farmer is struggling with infectious interdigital dermatitis in his dairy herd. After consulting with his veterinarian, he has decided to invest in a foot bath system. Since he knows a bit about the antimicrobial capabilities of isopropyl alcohol, he would like to use this (in diluted form) as his foot bath chemical. Why would you advise against this?
Respuesta
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Alcohols are volatile and flammable
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Isopropyl alcohol is not effective against all microbes
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Isopropyl alcohol would be inactivated by the organic materials in the foot bath
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All of the above are reasons not to use this compound
Pregunta 6
Pregunta
As a technician is cleaning the runs to the clinic’s dog room, she runs out of 10% bleach. In an effort to complete her cleaning, she grabs a bottle of color-safe bleach from the laundry room and decides to dilute it to 10% with tap water to make a working solution of bleach. What is a concern with this procedure?
Respuesta
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Water should not be used as a diluent, as it inactivates the chloride compound
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Color safe bleach is just a diluted form of regular bleach, so her dilution makes it too weak
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Color safe bleach is different than regular bleach, and has less disinfection capabilities
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She shouldn’t be using bleach at all, as dogs are very sensitive to chlorine
Pregunta 7
Pregunta
Chlorhexidine is a commonly used antiseptic used in veterinary medicine. All except one of the following are true regarding chlorhexidine. Which is incorrect?
Respuesta
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Chlorhexidine functions by damaging cell membrane of the pathogen and lysing the cell
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Chlorhexidine is effective against both enveloped and naked viruses
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Chlorhexidine maintains residual activity on skin surfaces
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Compared to alcohol, chlorhexidine resists inactivation by organic matter
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Chlorhexidine can be damaging as an otic preparation if the tympanic membrane is ruptured
Pregunta 8
Pregunta
What types of organisms are quaternary ammonium compounds effective against?
Respuesta
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Gram-positive bacteria
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Gram-negative bacteria
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Non-enveloped (“naked”) viruses
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Enveloped viruses
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Both A and D (Gram-positive bacteria & Enveloped viruses)
Pregunta 9
Pregunta
Which common disinfectant should be chosen to clean a piece of medical-grade plastic tubing that has a slimy film on its inside surface?
Respuesta
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Isopropyl alcohol
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10% bleach
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Tween buffer
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Glutaraldehyde
Pregunta 10
Pregunta
Iodine is effective in disinfecting/sanitizing all of the following except
Respuesta
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spattered bloody feces from a dog with parvovirus.
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nasal secretion of a dog with kennel cough.
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a ringworm lesion on a cat.
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a sample containing Clostridium tetani spores.
Pregunta 11
Pregunta
What occurs when populations of microorganisms are exposed to low concentrations of antimicrobial chemicals?
Respuesta
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Their growth is stopped
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Selective pressure is applied to create death
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Selective pressure is applied that creates resistance
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Their DNA is denatured
Pregunta 12
Pregunta
Why are pseudomonas species highly resistant to disinfection?
Respuesta
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They grow in large numbers
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They do not create a biofilm
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They cannot attach to living tissue
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They exude a glycocalyx
Pregunta 13
Pregunta
Common sites for nosocomial infections include all except
Respuesta
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orthopedic implants.
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urinary tracts.
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endotracheal tubes.
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pastures.
Pregunta 14
Pregunta
What can make disinfectants less effective?
Respuesta
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Hard water
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Improper dilution
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Inappropriate selection based on organism
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All of these
Pregunta 15
Pregunta
Non enveloped viruses common in veterinary hospitals include all but
Respuesta
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canine parvovirus.
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feline panleukopenia.
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feline calicivirus.
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rabies virus.
Pregunta 16
Pregunta
What is not important to consider when choosing disinfectants?
Respuesta
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cost
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color
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stability
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spectrum of action
Pregunta 17
Pregunta
What is alcohol’s main mechanism of action against pathogens?
Respuesta
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Destroy its DNA
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Slows bacterial cell wall growth
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Dissolves lipids
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Gets them drunk
Pregunta 18
Pregunta
Applying alcohol to open wounds is not recommended because
Respuesta
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alcohol is flammable.
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prolonged contact with alcohol can corrode metal surfaces.
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it effectively kills all pathogens instantly and prevents all infections.
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it causes pain and may also facilitate the survival of pathogens.
Pregunta 19
Pregunta
Why do hand sanitizers include alcohol?
Respuesta
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Alcohol is a surfactant.
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Alcohol has a quick kill time.
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Alcohol doesn’t affect the skins lipids.
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Alcohol can be applied to open wounds.
Pregunta 20
Pregunta
Why should a chlorine-disinfected cat cage be thoroughly rinsed before returning the cat?
Respuesta
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To remove chlorine-resistant bacteria
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To activate the disinfecting properties of chlorine
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To decrease the risk of skin irritation
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To allow the cage to dry
Pregunta 21
Pregunta
Instead of free-iodine compounds, iodophors ______________________________.
Respuesta
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are less irritating but have a shorter duration of action
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cannot be used on open wounds
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are no longer used in Vet medicine
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are less irritating and have a longer duration of action
Pregunta 22
Pregunta
A surfactant is a chemical that
Respuesta
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breaks the surface tension of water.
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allows easier interaction between organic material and chemicals.
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when combined with an iodophor are often referred to as surgical scrubs.
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All of the above are true
Pregunta 23
Pregunta
Phenols are most effective against
Respuesta
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gram-positive bacteria.
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gram-negative bacteria.
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spores.
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fungi.
Pregunta 24
Pregunta
Which is less inactivated by organic material?
Respuesta
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Detergents
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Quaternary ammonium
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Chlorine
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Phenols
Pregunta 25
Pregunta
What is the definition of “Disinfection?”
Respuesta
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Removal of all microbial organisms from a surface
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Removing visible debris off a surface
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General destruction of pathogens
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Treatment of an animal ill with an infectious disease
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