Exam 11: Physical and Chemical Control of Microbes

Your friend Joe recently visited the doctor for steroid injections into his knee to reduce swelling due to previous knee injury.Within a couple of days,he had an infection caused by Pseudomonas,a very pathogenic and drug resistant bacterium.Luckily,Joe went to the doctor immediately and received antibiotics.The doctor tells him that problem has occurred to many other people across the U.S.Predict the most likely cause of this situation:

Which of the following is not used as an antiseptic?

The easiest microbial forms to kill or inhibit are

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

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

Pasteurization

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

Prions require more extensive methods of sterilization than are needed for bacterial endospores.

The minimum sterilizing conditions in a steam autoclave are

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

Which of the following is not true of chloramines?

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

_____ solution was introduced in the late 19th century for preventing gonococcal infections in a newborn's eyes after exposure to the mother's infected birth canal.

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

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

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

Most microbial contaminants of food are killed or inactivated at freezing temperatures.

Antimicrobial agents can target the cell wall by

Bacteriostatic agents kill bacterial cells.

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