Exam 11: Physical and Chemical Agents for Microbial Control

Sterilization is achieved by

Physical agents for controlling microbial growth include all of the following, except

The sterilizing gas used in a special chamber is

The chemical agent(s) that produces highly reactive hydroxyl-free radicals and also decomposes to O₂ gas is/ are

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

All of the following are phenols or phenolics, except

The shortest time required to kill all the microbes in a sample at a specified temperature is called the

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

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

Moist heat damages microorganisms by

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

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

Ethylene oxide is

The presence of organic matter such as saliva and pus can interfere with the actions of disinfectants.

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

All of the following are major categories of microbial control methods except

Historically, which of the following was instilled into the eyes of newborn infants to prevent gonococcal infections?

The compound that is an organic base containing chlorine and two phenolic rings and is used increasingly for hand scrubbing, neonatal washes, wound degerming, and prepping surgical skin sites is

All of the following are methods of disinfection or sterilization, except

Microbiological contaminants are best described as