Exam 11: Physical and Chemical Agents for Microbial Control

Alcohols:

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

For each item listed below, select a sterilant that you feel is the most suitable and effective for that item.Discuss why you selected each sterilant. A) plastic Petri dishes to be used for nutrient media B) glass tubes of bacterial cultures to be discarded C) sterile milk D) dozens of reusable glass pipets E) bone tissue for grafting F) room air G) hospital mattresses H) biopsy tissue for histology analysis I) plastic respiratory therapy equipment and arthroscopes J) vaccines

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

_____ filters are widely used to provide a flow of sterile air to hospital rooms.

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

Disinfection of beverages, such as apple juice, milk, and wine, is optimally achieved by:

Microbiological contaminants are best described as:

Discuss the advantages and disadvantages of irradiating food.Include examples of foods that are irradiated.

When a control agent targets the metabolic processes of microbial cells, active younger cells typically die more rapidly than older cells.

Compare and contrast antisepsis, disinfection, sanitization, and sterilization with regard to techniques used and level of microbial control achieved.

Iodophors include:

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

The sterilizing gas used in a special chamber is:

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

Discuss the technique of filtration as a microbial control method, why it's utilized, and specific materials that are filtered.

_____ radiation excites atoms to a higher energy state within molecules such as DNA that then leads to the formation of pyrimidine dimers.

Which of the following types of agents targets protein conformation?

Using toilet bowl cleaner and nonionizing radiation to inanimate surfaces only removes or kills vegetative bacteria.The term that best describes this action is:

All of the following are phenols or phenolics, except: