Exam 9: Physical and Chemical Control of Microbes

All of the following pertain to hypochlorites except ________.

Ionizing radiation is more effective than nonionizing radiation in killing microbes.

Which of the following is not a factor that affects germicidal activity?

A woman who is 38 weeks pregnant is admitted for a scheduled cesarean section. The RN performs an assessment of the patient and prepares her for the surgery. Prior to the procedure, an indwelling urinary catheter is placed. -The RN prepares the patient for the sterile procedure.Which of the following statements made by the patient,best demonstrates understanding of the need for sterile equipment and aseptic procedures?  

Of the six methods of controlling growth by physical means; heat,cold,desiccation,radiation,filtration and osmotic pressure,the only method that is capable of complete sterilization is radiation.

The use of a physical or chemical process to destroy vegetative pathogens is ________.

Which control method would not be a suitable choice for killing Mycobacterium in a capped culture tube?

Which of the following does not affect microbial nucleic acids?

Microbicidal agents are sterilants.

Bacteristatic agents kill bacterial cells.

Aldehyde-based compounds,while effective sterilants,can be unstable and costly to use.

Scrubbing or immersing the skin in chemicals to reduce the numbers of microbes on the skin is ________.

Analine dyes,like crystal violet,have antimicrobial activity particularly against gram-positive bacteria and some fungi.

All of the following are disadvantages to using compounds containing heavy metals,except ________.

One disadvantage to using ortho-phthalaldehyde vs.glutaraldehyde as an antimicrobial agent is ________.

The process of using a cleansing technique to mechanically remove and reduce microorganisms and debris to safe levels is ________.

Sterilization is achieved by ________.

A microorganism that is not motile and has stopped metabolizing could be considered dead.

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. -If chlorhexidine is unavailable for the procedure,which of the following chemical agents would also be appropriate as a topical antiseptic?  

Heavy metals such as silver,mercury and copper are effective antimicrobials due to their ability to bind to the regulatory site of enzymes,thus acting as an irreversible non-competitive inhibitor.