Question 1

What is the name of the organism that has been a documented cause of nursery outbreaks of neonatal meningitis and brain abscesses?

Accepted Answer

A) Citrobacter freundii 
B) C.asteroides 
C) C.braakii 
D) C.koseri 
A) Citrobacter freundii 
B) C.asteroides 
C) C.braakii 
D) C.koseri D

Question 2

Which animals are a common source of Salmonella serotypes?

Accepted Answer

A) Dogs 
B) Cold-blooded animals (fish) 
C) Cats 
D) Horses 
A) Dogs 
B) Cold-blooded animals (fish) 
C) Cats 
D) Horses B

Question 3

All of the following are clinically significant isolates of the genus Enterobacter except:

Accepted Answer

A) Enterobacter cloacae. 
B) E.aerogenes. 
C) E.gergoviae. 
D) E.hartmanni. 
A) Enterobacter cloacae. 
B) E.aerogenes. 
C) E.gergoviae. 
D) E.hartmanni. D

Question 4

What enteric organism may produce a blue-violet pigment on non-blood-containing media?

Accepted Answer

A) Kluyvera 
B) Shigella 
C) Ewingella 
D) Cedecea 
A) Kluyvera 
B) Shigella 
C) Ewingella 
D) Cedecea

Question 5

All of the following are characteristics of Shigella spp.except:

Accepted Answer

A) nonmotile. 
B) urea positive. 
C) hydrogen sulfide negative. 
D) lysine decarboxylase negative. 
A) nonmotile. 
B) urea positive. 
C) hydrogen sulfide negative. 
D) lysine decarboxylase negative.

Question 6

What genus has the following characteristics: negative for urea, positive for lysine decarboxylase, positive for hydrogen sulfide, positive for indole, and does not grow on Simmon's citrate?

Accepted Answer

A) Providencia 
B) Edwardsiella 
C) Escherichia 
D) Morganella 
A) Providencia 
B) Edwardsiella 
C) Escherichia 
D) Morganella

Question 7

Bacillary dysentery caused by this organism is marked by penetration of intestinal epithelial cells following attachment of the organisms to mucosal surfaces, local inflammation, shedding of the intestinal lining, and formation of ulcers that follow the epithelial penetration.What is this organism?

Accepted Answer

A) Enterobacter 
B) Citrobacter 
C) Shigella 
D) Salmonella 
A) Enterobacter 
B) Citrobacter 
C) Shigella 
D) Salmonella

Question 8

Which organism is the most common cause of urinary tract infections (UTIs) in humans?

Accepted Answer

A) Escherichia coli 
B) Klebsiella oxytoca 
C) Proteus mirabilis 
D) Enterobacter cloacae 
A) Escherichia coli 
B) Klebsiella oxytoca 
C) Proteus mirabilis 
D) Enterobacter cloacae

Question 9

What organism presents as a pink colony with a halo on MacConkey media and a green metallic sheen on eosin methylene blue (EMB)?

Accepted Answer

A) Salmonella enterica 
B) Proteus mirabilis 
C) Escherichia coli 
D) Klebsiella pneumonia 
A) Salmonella enterica 
B) Proteus mirabilis 
C) Escherichia coli 
D) Klebsiella pneumonia

Question 10

This genus currently has only one species associated with it that has been implicated in urinary tract infections.What is the name of this organism?

Accepted Answer

A) Klebsiella pneumoniae 
B) Escherichia coli 
C) Hafnium alvei 
D) Morganella morganii 
A) Klebsiella pneumoniae 
B) Escherichia coli 
C) Hafnium alvei 
D) Morganella morganii

Question 11

What bacterium is the causative agent of the plague?

Accepted Answer

A) Salmonella enteritidis 
B) Citrobacter freundii 
C) Shigella sonnei 
D) Yersinia pestis 
A) Salmonella enteritidis 
B) Citrobacter freundii 
C) Shigella sonnei 
D) Yersinia pestis

Question 12

The primary pathogens of the Enterobacteriaceae include all the following except:

Accepted Answer

A) Salmonella enterica. 
B) Proteus mirabilis. 
C) Shigella spp. 
D) Yersinia spp. 
A) Salmonella enterica. 
B) Proteus mirabilis. 
C) Shigella spp. 
D) Yersinia spp.

Question 13

What organism in the genus Providencia is incriminated in nosocomial outbreaks in burn units and has been isolated from urine cultures?

Accepted Answer

A) Providencia stuartii 
B) P.heimbachae 
C) P.rustigianii 
D) P.alcalifaciens 
A) Providencia stuartii 
B) P.heimbachae 
C) P.rustigianii 
D) P.alcalifaciens

Question 14

All of the following are categories of diarrhea-causing Escherichia coli except:

Accepted Answer

A) ETEC. 
B) EMEC. 
C) EIEC. 
D) EPEC. 
A) ETEC. 
B) EMEC. 
C) EIEC. 
D) EPEC.

Question 15

All of the following are symptoms of salmonellosis that may appear 8 to 36 hours after ingestion of contaminated food except:

Accepted Answer

A) nausea. 
B) vomiting. 
C) headache. 
D) watery diarrhea. 
A) nausea. 
B) vomiting. 
C) headache. 
D) watery diarrhea.

Question 16

Escherichia coli strains have all the following properties except:

Accepted Answer

A) indole production. 
B) fermentation of glucose and lactose. 
C) methyl red (MR) positive, Voges-Proskauer (VP) negative. 
D) can use citrate as a sole carbon source. 
A) indole production. 
B) fermentation of glucose and lactose. 
C) methyl red (MR) positive, Voges-Proskauer (VP) negative. 
D) can use citrate as a sole carbon source.

Question 17

What genus of bacteria is considered an opportunistic pathogen often associated with nosocomial outbreaks?

Accepted Answer

A) Enterobacter 
B) Serratia 
C) Proteus 
D) Escherichia 
A) Enterobacter 
B) Serratia 
C) Proteus 
D) Escherichia

Question 18

What substance, when produced by the Salmonella spp., which cause gastroenteritis, has been implicated as a significant virulence factor?

Accepted Answer

A) Hyaluronidase 
B) Protease 
C) Enterotoxin 
D) Endotoxin 
A) Hyaluronidase 
B) Protease 
C) Enterotoxin 
D) Endotoxin

Question 19

All of the following are members of the Citrobacter genus except:

Accepted Answer

A) Citrobacter freundii. 
B) C.koseri. 
C) C.asteroides. 
D) C.braakii. 
A) Citrobacter freundii. 
B) C.koseri. 
C) C.asteroides. 
D) C.braakii.

Question 20

What disease produced by a Salmonella spp.is a severe form of enteric fever?

Accepted Answer

A) Pontiac fever 
B) Typhoid fever 
C) Undulant fever 
D) Malignant fever 
A) Pontiac fever 
B) Typhoid fever 
C) Undulant fever 
D) Malignant fever

Exam 19: Enterobacteriaceae

What is the name of the organism that has been a documented cause of nursery outbreaks of neonatal meningitis and brain abscesses?

Which animals are a common source of Salmonella serotypes?

All of the following are clinically significant isolates of the genus Enterobacter except:

What enteric organism may produce a blue-violet pigment on non-blood-containing media?

All of the following are characteristics of Shigella spp.except:

What genus has the following characteristics: negative for urea, positive for lysine decarboxylase, positive for hydrogen sulfide, positive for indole, and does not grow on Simmon's citrate?

Bacillary dysentery caused by this organism is marked by penetration of intestinal epithelial cells following attachment of the organisms to mucosal surfaces, local inflammation, shedding of the intestinal lining, and formation of ulcers that follow the epithelial penetration.What is this organism?

Which organism is the most common cause of urinary tract infections (UTIs) in humans?

What organism presents as a pink colony with a halo on MacConkey media and a green metallic sheen on eosin methylene blue (EMB)?

This genus currently has only one species associated with it that has been implicated in urinary tract infections.What is the name of this organism?

What bacterium is the causative agent of the plague?

The primary pathogens of the Enterobacteriaceae include all the following except:

What organism in the genus Providencia is incriminated in nosocomial outbreaks in burn units and has been isolated from urine cultures?

All of the following are categories of diarrhea-causing Escherichia coli except:

All of the following are symptoms of salmonellosis that may appear 8 to 36 hours after ingestion of contaminated food except:

Escherichia coli strains have all the following properties except:

What genus of bacteria is considered an opportunistic pathogen often associated with nosocomial outbreaks?

What substance, when produced by the Salmonella spp., which cause gastroenteritis, has been implicated as a significant virulence factor?

All of the following are members of the Citrobacter genus except:

What disease produced by a Salmonella spp.is a severe form of enteric fever?

Bacterial Cell Structure, Physiology, Metabolism, and Genetics

Host-Parasite Interaction

The Laboratory Role in Infection Control

Control of Microorganisms

Performance Improvement in the Microbiology Laboratory

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Microscopic Examination of Materials From Infected Sites

Use of Colony Morphology for the Presumptive Identification of Microorganisms

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