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Chapter Quiz
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1
What is the most serious pathogen within the genus Staphylococcus?
A)Staphylococcus epidermidis
B)Staphylococcus saprophyticus
C)Staphylococcus hominis
D)Staphylococcus aureus
E)Staphylococcus capitis
2
Why is Staphylococcus aureus considered a troublesome hospital pathogen?
A)Because its optimum growth temperature is 37(°)C
B)Because it resists the effects of many disinfectants and antibiotics
C)Because it is a facultative anaerobe
D)Because it grows in large, round opaque colonies
E)Because it can digest proteins and lipids, and ferment a variety of sugars
3
What is the most diagnostic species characteristic of Staphylococcus aureus?
A)The production of hyaluronidase
B)The production of penicillinase
C)The production of coagulase
D)The production of leukocidin
E)The production of a-toxin
4
Which is not an effect of the Staphylococcus aureus alpha-toxin?
A)It acts upon the human gastrointestinal tract
B)It lyses red blood cells of various mammals
C)It causes leukocyte damage
D)It damages skeletal and heart muscle
E)It damages kidney tissues
5
Staphylococcus aureus is most frequently isolated from what body site?
A)Gastrointestinal tract
B)Genitourinary tract
C)Vagina
D)Nostrils
E)Stomach
6
What is the most common infection caused by Staphylococcus aureus?
A)Staphylococcal enterotoxicosis
B)Folliculitis
C)Toxic shock syndrome
D)Osteomyelitis
E)Staphylococcal Bacteremia
7
Staphylococcal food intoxication is associated with eating all but which of the following foods?
A)Custards
B)Chicken salad
C)Ham and processed meats
D)Hamburger
E)Cream pastries
8
What factor appears to support colonization and proliferation of both Staphylococcus aureus and the coagulase-negative staphylococci within patients?
A)An open wound
B)A preexisting condition
C)A foreign object
D)A primary infection
E)The use of antibiotics
9
What is the key test that separates Staphylococcus aureus from other staphylococci?
A)Susceptibility to novobiocin
B)Catalase test
C)Growth on blood agar
D)Coagulase test
E)Urease test
10
What is the key test that differentiates the staphylococci from the streptococci?
A)Catalase Test
B)Susceptibility to novobiocin
C)Growth on blood agar
D)Coagulase test
E)Urease test
11
How are the streptococci differentiated from the staphylococci when viewed microscopically following the Gram stain procedure?
A)Staphylococci are gram-positive, while streptococci are gram-negative
B)Staphylococci are gram-positive and grow in grape-like clusters, while streptococci are also gram-positive, but grow in chains
C)Staphylococci are gram-positive cocci, while streptococci are gram-positive bacilli
D)Staphylococci are gram-negative bacilli, while streptococci are gram-negative cocci
E)They cannot be differentiated microscopically
12
What is the most serious streptococcal pathogen of humans?
A)Streptococcus agalactiae
B)Streptococcus mutans
C)Streptococcus pyogenes
D)Enterococcus faecalis
E)Streptococcus sanguis
13
Why do toxic shock syndrome and necrotizing fasciitis cause such severe pathology to host tissues?
A)The streptococcal toxins act as superantigens
B)The organisms have been infected by a temperate bacteriophage
C)The organisms possess M protein
D)The organisms produce streptokinase and hyaluronidase
E)The organisms are extremely resistant to antimicrobial drugs
14
Primary infections caused by Streptococcus pyogenes are due to the organisms invading what two body sites?
A)Nose and vagina
B)Skin and eyes
C)Eyes and gastrointestinal tract
D)Mouth and urethra
E)Skin and throat
15
What species of the streptococci can be transferred to an infant during delivery?
A)Streptococcus pyogenes
B)Enterococcus faecalis
C)Enterococcus faecium
D)Streptococcus bovis
E)Streptococcus agalactiae
16
What test allows for the differentiation of Group A streptococci from other beta-hemolytic streptococci?
A)CAMP test
B)Hippurate hydrolysis
C)Esculin hydrolysis
D)Bacitracin sensitivity
E)Growth in 6.5% salt
17
What is the major virulence factor of Streptococcus pneumoniae?
A)M protein
B)Pyogenic exotoxins
C)Capsule
D)DNase
E)Hyaluronidase
18
What organism is responsible for the majority of cases of otitis media in children?
A)Streptococcus pneumoniae
B)Staphylococcus aureus
C)Streptococcus pyogenes
D)Streptococcus mutans
E)Staphylococcus epidermidis
19
Virulence factors of Neisseria gonorrhoeae include all except which of the following?
A)Fimbriae that promote attachment
B)Surface molecules that promote attachment
C)IgA protease
D)Hemolysis
E)Fimbriae that slow phagocytosis
20
Most cases of gonorrhea occur within what age range?
A)14-18 years
B)18-24 years
C)24-26 years
D)26-30 years
E)30-35 years
21
How do Neisseria gonorrhoeae appear when stained with the Gram stain and viewed microscopically?
A)Gram-positive cocci in grape-like clusters
B)Gram negative rods
C)Gram positive diplococci
D)Gram- negative cocci in grape-like clusters
E)Gram negative diplococci
22
Meningitis associated with Neisseria meningitidis usually occur as what type?
A)Endemic
B)Epidemic
C)Pandemic
D)Isolated
E)Common-source
23
What is the reservoir of Neisseria meningitidis?
A)Soil
B)Saltwater
C)Human carriers
D)Domesticated animals
E)Reptiles
24
How is Neisseria meningitidis spread?
A)Through respiratory secretions or droplets
B)Through contaminated fomites
C)Through consumption of contaminated food or water
D)By insect vectors
E)Through sexual contact







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