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Exam 9: Physical and Chemical Control of Microbes

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Question 1

True/False

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Hydrogen peroxide can be used to sterilize instruments such as endoscopes.

A) True
B) False

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Question 2

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Ethylene oxide is ________.

A) sporicidal
B) only effective with high heat
C) the active agent in household bleach
D) used as an antiseptic against anaerobes
E) a halogen

F) A) and B)
G) A) and C)

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Question 3

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Alcohols ________.

The betadine swab before blood donation is an example of ________.

Which is correct regarding the rate of microbial death?

________ is a halogen used in gaseous and liquid form for large-scale disinfection of drinking water and sewage.

Microbial death occurs when there is ________.

Phenols are useful antimicrobial compounds in that they are effective against bacteria fungi and viruses,disrupting several cellular targets,however,they have been removed from many consumer products because of their high toxicity and propensity to select for resistant strains of microorganisms.

All of the following are accurate statements concerning microbial control using dry heat except ________.

Vials of microorganisms that undergo the freeze-drying process called ________ will remain preserved and viable for years.

The use of chemical agents directly on exposed body surfaces to destroy or inhibit vegetative pathogens is ________.

Heavy metals work by ________.

A 13-year-old male is admitted to the pediatric intensive care unit. The patient has a history of mental retardation and cerebral palsy following an anoxic injury as an infant. The patient was admitted two months earlier due to aspiration pneumonia, necessitating a lengthy hospital stay, mechanical ventilation, and intravenous antibiotics. His caregiver reports another aspiration event two days prior. For the past 24 hours, the patient has been lethargic with a frequent cough producing thick sputum. Upon presentation to the hospital, the patient is noted to have a fever, low oxygen saturations, and low blood pressure. Upon arrival to the intensive care unit, the patient is cool, pale, and has poor pulses and capillary refill. Following administration of intravenous fluid boluses, it is determined the patient needs central venous access for fluid and medication administration. The RN prepares for the sterile procedure. -To reduce the patient's risk of infection,the RN assists the physician with applying all of the following prior to the procedure except ________.

Soaps and detergents are very effective as sterilants.

Placing organisms at 4ᵒC is ________.

Chlorine compounds remain stable and effective in the presence of excess organic matter.

A 13-year-old male is admitted to the pediatric intensive care unit. The patient has a history of mental retardation and cerebral palsy following an anoxic injury as an infant. The patient was admitted two months earlier due to aspiration pneumonia, necessitating a lengthy hospital stay, mechanical ventilation, and intravenous antibiotics. His caregiver reports another aspiration event two days prior. For the past 24 hours, the patient has been lethargic with a frequent cough producing thick sputum. Upon presentation to the hospital, the patient is noted to have a fever, low oxygen saturations, and low blood pressure. Upon arrival to the intensive care unit, the patient is cool, pale, and has poor pulses and capillary refill. Following administration of intravenous fluid boluses, it is determined the patient needs central venous access for fluid and medication administration. The RN prepares for the sterile procedure. -Prior to placement of the central venous line,the patient's skin is scrubbed with chlorhexidine.Which of the following microorganisms are targeted by this chemical agent?  

The compound that is an organic base containing chlorine and two phenolic rings,and is used increasingly for mucous membrane irrigation,obstetrical washes,hand scrubbing,and prepping surgical skin sites is ________.

________ is a control method that removes microorganisms rather than inhibiting or killing them.

Physical agents for controlling microbial growth include all the following except ________.