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Flashcards in Antimicrobic Sensitivity Testing LAB Deck (39)
0

What is a nosocomial infection ?

An infection acquired in hospital by a patient who was admited for reason other than that infection.

1

True or False
A nosocomial infection also includes infections acquired in the hospital but appearing after discharge

True

2

True or False
Occupational infections among staff of the facility are NOT considered nosocomial infections

False

3

What is another termed used for nosocomial infection?

Hospital acquired infection

4

What does MRSA stand for?

Methicillin Resistant Staphylococcus aureus

5

MRSA is a gram positive or a gram negative?

gram positive

6

True or False
MRSA causes skin infections, bloodstream infections, and pneumonia

True

7

True or False
MRSA used to be sensitive to antibiotics, but now has become resistant to some antibiotics

True

8

Why is MRSA dangerous

because it adapts to the presence of antibiotic that were designated to kill them

9

Which are harder to get rid of?
MRSA or MRDO?

MRDO, patietns have long stays in the hospital and even die from it

10

How is MRSA spread?

Through human hands
ex: healthcare workers

11

What does VRE stand for?

Vancomycin Resistant Enterococci

12

Is VRE a gram positive or gram negative?

Gram positive

13

Where does VRE normally present itself in humans?
a) skin
b) lungs
c) oral mucosa
d) intestinal tract

d

14

What types of clients are at risk for VRE?

Those with weakened immune system, urinary catheters, undergone surgery in the abdomen and have been treated with Vancomycin in the past

15

What is the drug of choice to treat VRE, but sometimes the organism comes resistant?
a) Penicillin
b) Amoxicillin
c) Vancomycin
d) Nystatin

c

16

How is VRE spread?

by the hand of the health care personnel

17

What does the C stand for in C.Difficile?

Clostridium

18

Is C.diff gram positive or gram negative

gram positive

19

What exotoxins does C.diff produce?

toxin A and toxin B

20

What are some symptoms of C.diff?

watery diarrhea, fever, loss of appetite, nausea, abdominal pain

21

True or False
Some patients who are just colonized exhibit no clinical symptoms will test positive for C.diff

True
Colonization is more common than the actual disease

22

What test do laboratories test for the exotoxins of C.Diff
a) inoculation
b) EIA
c) blood test
d) urinalysis

b

23

How is C.diff spread?

by the hands of the healthcare personnel who have touched a contaminated item

24

What does GAS stand for?

Group A Streptococcus

25

Is Gas a gram positive or gram negative?

Gram Positive Cocci in chains

26

What types of disease are caused by GAS?
a) strep throat
b) pharyngitis or impatigo
c) Scarlet Fever
d) All of the above

d

27

True or False
GAS can cause the flesh eating disease (Necrotizing Fasciitis)

True

28

What disease caused by GAS results in a rapid drop in blood pressure and causes kidney, liver and lung failure

Streptococcal Toxic Shock Syndrome

29

True or False
People with chronic illnesses like cancer, chronic lung or heart disease, the elderly, a history of alcohol and drug abuse are LESS susceptible to get Group A Strep

False
They are greater risk

30

How is GAS spread?

Direct contact with mucus from the nose or throat of infected people or through contact with infected wounds or sores

31

Some antibiotics _________ are more effective against gram-positive or gram-negative organism, and some are effect agains both gram positive and gram negative organisms
a) antimicrobials
b) broad-spectrum antibiotics

a then b

32

Sensitivity testing is done by the ________ using Mueller-Hinton 11 agar.
a) Buer Method
b) Standardized methods
c) Positive Sample testing methods
d) Mueller Hinton Methods

a

33

True or False
When doing sensitivity testing, Variables in the testing process must be standardized

TRUE

34

The depth of the media in the Petri dish must be no more than ____mm.
a) 1
b) 3
c) 4
d) 0.5

c

35

The ph of this media should be between
a) 5.6 - 6.1
b) 7.0-7.2
c) 6.6-6.9
d) 7.2- 7.4

d

36

What is the most important part of the disk?

the concentration of the antibiotic

37

How long do you incubate when doing sensitivity testing?

16-18 hours at 35 degrees

38

What indicates whether the organism is sensitive or resistant to the antibiotic?
a) the color of the inhibition zone
b) the size of the inhibition zone
c) the odor of the growth
c) the solubility of the growth

b