Exam 9: Physical and Chemical Control of Microbes

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

Most microbial contaminants of food are killed at freezing temperatures.

Beginning Fall 2017, the FDA banned the use of phenolic compounds, such as triclosan, in consumer soaps and lotions. This is due to ________.

The advantage of using ethylene oxide as a sterilant over moist heat sterilization in an autoclave is that ________.

When comparing the Bunsen burner and a hot-air oven, the Bunsen burner is more versatile since it can sterilize a wide range of materials, including plastics, cottons and oils.

The chemical agent that produces highly toxic and reactive free radicals is ________.

The lowest temperature needed to kill all microbes in 10 minutes is the ________.

The RN cleanses the urethral opening with an iodine swab. Which of the following terms most appropriately describes this method of microbial control?

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.

The method of removing vegetative life forms from living surfaces is termed ________.

Which of the following types of control agents would be used to achieve sterility?

Ethylene oxide is a sterilizing gas.

The process that destroys or removes all microorganisms and microbial forms including bacterial endospores on inanimate objects is ________.

After preparing the patient's skin, the RN brushes against the sterile field with her arm. What is the most appropriate action by the RN?

Pasteurization will make milk sterile.

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

Which of the following items are typically irradiated in order to kill microbes?

Disinfection of beverages such as apple juice, milk, wine is optimally achieved by ________.

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

What instrument is most effective for pressure-temperature sterilization?