Microbiology Test1 Part 3

Front 1

In which category of media would MacConkey agar best fit?

Back 1

Selective and differential

Front 2

In which category of media would blood agar best fit?

Back 2

Differential

Front 3

Which medium can be described as suppressing the growth of most gram negative organisms while allowing gram-positive bacteria to grow?

Back 3

CNA (colistin, nalidixic acid) blood

Front 4

Which medium can be described as containing crystal violet dye to inhibit the growth of gram-positive bacteria and fungi and allows many types of gram-

Back 4

negative bacilli to grow?

Front 5

What name is given to the type of hemolysis that produces incomplete hemolysis and a greening discoloration of the medium?

Back 5

Beta hemolysis

Front 6

Which group of bacteria uses oxygen as a terminal electron acceptor and grows well in ambient air?

Back 6

i

Front 7

Increased concentrations of carbon dioxide (C02) (5% to 10%) and approximately 15% oxygen (02) produce an environmental condition that best suits which type of organism?

Back 7

Capnophiles

Front 8

Reduced 02 (5% to 10%) and increased C02 (8% to 10%) produce an environmental condition that best suits which type of oganism?

Back 8

Microaerophiles

Front 9

A candle jar is used to cultivate which type of bacteria?

Back 9

Capnophiles

Front 10

An oxidase test was performed on two organisms for quality control purposes. Pseudomonas aeruginosa and Stenotrophomonas maltophilia tested positive and negative, respectively. Is there a discrepancy?

Back 10

No

Front 11

Which organism grows best at 42 0 C?

Back 11

Camplogactive juny

Front 12

Escherichia coli, a member of the family Enterobacteriaceae is resistant to the antibiotic vancomycin. True or False

Back 12

True

Front 13

Antimicrobial agents that inhibit bacterial growth but generally do not kill the organism are known as:

Back 13

baicerolstatic

Front 14

Antimicrobial resistance resulting from the normal genetic, structural, or physiologic state of a microorganism is referred to asresistance.

Back 14

Int

Front 15

Staphylococcus aureus is a gram-positive organism that produces the enzyme beta-lactamase, which renders certain types of antibiotics inactive. The mode of action that is prevented in certain antibiotics sensitive to this enzyme is:

Back 15

Cell wall systesis

Front 16

Up-to-date tables that list potential antimicrobial agents to include in batteries for testing against particular organisms or organism groups are published by the:

Back 16

Clsi

Front 17

A bacterial suspension of 1.5 x 108 colony-forming units (CFUs)/mL js comparable with which standard inoculum?

Back 17

0.5

Front 18

In the disk diffusion method of antimicrobial susceptibility testing, what is the standard agar base medium used for testing most bacterial organisms?

Back 18

Mular ager

Front 19

Detection of the haze produced by some resistant staphylococci and enterococci against methicillin and vancomycin can best be accomplished by:

Back 19

using transmitted light

Front 20

The antibiotic nitrofurantoin is effective against both gram-positive and gramnegative bacteria. This antibiotic is effective against which type of specimen?

Back 20

Urine

Front 21

An important requirement for appropriate inoculum preparation in susceptibility testing includes the use of a(n):

Back 21

pure culture

Front 22

In the microdilution broth dilution method, the interpretive criteria for the susceptible, intermediate, or resistant categories are based on:

Back 22

correlations of MIC with serum achievable levels for the antimicrobial agent, particular resistance mechanisms, and successful therapeutic outcomes.

Front 23

The concentrations in a broth dilution test that separate the categories of susceptible, intermediate, and resistant are called:

Back 23

Breakpoints

Front 24

Chromogenic cephalosporins are used to test for:

Back 24

the production of beta-lactamase by the infecting organism

Front 25

Staphylococcal resistance to oxacillin is used to determine and report resistance to:

Back 25

Cephalosporins

Front 26

Bactericidal tests should be performed

Back 26

for severe and life-threatening infections

Front 27

The most frequent agent of nosocomial bacteremia is:

Back 27

coagulase-negative staphylococci

Front 28

Which is the most important human pathogen in the species of Staphylococcus?

Back 28

Staph aureus

Front 29

Which group of bacteria is described as catalase positive and is gram-positive cocci that grow facultatively anaerobic and form grapelike clusters?

Back 29

Staphylococcus

Front 30

The first identification test performed on a clinical isolate of gram-positive, catalase-positive cocci would likely be:

Back 30

coagulase test

Front 31

In clinical isolates, the most likely identification of coagulase-positive, catalasepositive, gram-positive cocci that are penicillin resistant would be:

Back 31

Staphylococcus aureus

Front 32

Which virulent and important human pathogen can also be recovered from the nares, perineum, and other skin sites of healthy people, especially in the hospital setting?

Back 32

Staphylococcus aureus

Front 33

The resident human flora, staphylococcus, which is more likely to cause infections in compromised hosts such as patients with cancer, is:

Back 33

Staphylococcus epidermidis