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How big do you know the micro -Part 2!

Total questions: 30

Worksheet time: 5mins

Name
Class
Date
1.

The ONPG test is most useful when differentiating:

a)

Shigella from some strains of E. coli

b)

E.coli from some strains of Shigella

c)

Yersinia from some strains of E. coli

d)

Providencia from some strains of Shigella

e)

None

2.

The ff. has/have strong urease activity, except:

a)

P. vulgaris

b)

H. pylori

c)

C. jejuni

d)

P. rettgeri

e)

None

3.

A positive Simmon Citrate test is seen as a:

a)

Green color in medium after 18 hours of incubation

b)

Blue color in medium after 24 hours of incubation

c)

Turbidity in medium after 24 hours of incubation

d)

Zone of inhibition after 18 hours of incubation

e)

None

4.

LIA showing a purple slant and blackened butt indicates

a)

Shigella

b)

Proteus

c)

Citrobacter

d)

Salmonella

e)

None

5.

Organism able to grow in MacConkey agar:

a)

P. aeruginosa

b)

B. cepacia

c)

Aeromonas spp.

d)

K. kingae

e)

None

6.

Which genera will be + for phenylalanine deaminase

a)

Citrobacter

b)

Serratia

c)

Pseudomonas

d)

Providencia

e)

Moraxella

7.

Organism that might affect patients with cystic fibrosis:

a)

B. pertussis

b)

H. influenzae

c)

P. stutzeri

d)

S. maltophila

e)

E. corrodens

8.

Which does not describe Clostridium difficile?

a)

Horse stable odor

b)

Flouresces chartreuse

c)

Has a tropism in the CNS

d)

Spore-forming bacilli

e)

Causes pseudomembranous colitis

9.

Organism usually associated with mouth infections :

a)

A. baumannii

b)

H. aegypticus

c)

S. minus

d)

A. actinomycetemcomitans

e)

None

10.

The following tests best differentiates Shigella from E. coli, EXCEPT?

a)

Lactose

b)

Indole

c)

Motility

d)

ONPG

e)

None

11.

This organism is usually associated with bacterial endocarditis

a)

H. parainfluenzae

b)

P. aeruginosa

c)

V. cholerae

d)

H. ducreyi

e)

B. mallei

12.

In the carbohydrate fermentation test, the blackening of the media is due to the presence of what indicator?

a)

Hydrogen sulfide

b)

Ferrous chloride

c)

Ferric chloride

d)

Ferrous sulfate

e)

Hydrogen chloride

13.

Organisms that produce acid in both aerobic and anaerobic tubes are considered:

a)

Oxidizers

b)

Fermenters

c)

Assacharolytic

d)

None

14.

Enzyme that is a characteristic of Proteus:

a)

Decarboxylase

b)

Deoxyribonuclease

c)

Amylase

d)

Urease

e)

Beta-Lactamase

15.

Erysipelas is an infection cause by:

a)

E. rhusiopathiae

b)

C. minutissimum

c)

S. pyogenes

d)

S. paratyphi

e)

None

16.

The following biochemical results are TRUE for Klebsiella pneumoniae, except:

a)

LIA: K/A

b)

Citrate: BLUE

c)

Motility: negative

d)

VP: negative

e)

None

17.

Which of the following is a true biochemical test result for Citrobacter freundii?

a)

Indole: Red

b)

H2S Production: no blackening

c)

TSI: K/A after 48 hours

d)

ONPG: yellow

e)

None

18.

The following organism/s is/ are citrate utilization test positive, except:

a)

Shigella sonnei

b)

Proteus vulgaris

c)

Salmonella typhi

d)

Providencia rettgeri

e)

None

19.

Which statements correctly describes the antigens of Enterobacteriaceae?

a)

The O Ag is heat labile

b)

The Vi Ag is an example of a flagellar Ag

c)

The K Ag is also known as somatic Ag

d)

The O Ag is located on cell wall

e)

None

20.

Worldwide cause of respiratory diseases prevalent in airconditioning towers

a)

P. aeruginosa

b)

B. parapertussis

c)

F.tularensis

d)

L. pneumophila

e)

A. israelii

21.

Common causative agent of adult 100 day cough

a)

L. pneumophila

b)

B.fragilis

c)

B.pertussis

d)

P.multicoda

e)

F. tularensis

22.

A principal characteristics used in distinguishing intestinal pathogens from other Enterobacteriaceae is:

a)

Lactose fermentation

b)

Rate of growth

c)

Mannitol fermentation

d)

Animal pathogenicity

e)

None

23.

Appears as four to six pointed star like configuration on a clear medium:

a)

A. baumannii

b)

A. actinomycetemcomitans

c)

E. corrodens

d)

K. kingae

e)

S. maltophila

24.

This organism can be detected by performing Forshay susceptibility test.

a)

Bifidobacterium spp.

b)

P. multicoda

c)

F. tularensis

d)

C. jejuni

e)

B. pertussis

25.

Which of the following reagents is added to detect production of indole?

a)

bromcresol purple

b)

alpha naphthol and KOH

c)

para dimethylaminobenzaldehyde

d)

p-dmiethylaminocinnamaldehyde

e)

neutral red

26.

Causative agent of soft chancre:

a)

Koch weeks bacillus

b)

Pfeiffer’s bacillus

c)

Koch bacillus

d)

Whitmore’s bacillus

e)

Ducrey's bacillus

27.

The shiga-like toxin is produced mainly by which Enetrobacteriaceae?

a)

E. coli

b)

S. dysenteriae

c)

S. typhimurium

d)

E. cloacae

e)

None

28.

Tend to swarm on moist agar producing a bluish gray confluent surface growth that gives off burnt gun powder odor:

a)

P. vulgaris

b)

P. aeruginosa

c)

S. marcescens

d)

S. typhi

e)

P. rettgeri

29.

Which of the following Klebsiella species is associated with nasal and oropharyngeal infections?

a)

K. pneumoniae

b)

K. ozaenae

c)

K. oxytoca

d)

K. rhinoscleromatis

e)

None

30.

Resembles the school of fish morphology in gram stain:

a)

Ducrey bacillus

b)

Pfeiffer’s bacillus

c)

Koch weeks bacillus

d)

Whitmore’s bacillus

e)

None

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