Question 1

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 2

What organism presents as a pink colony with a halo on MacConkey media and a green metallic sheen on 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 3

What substance,when produced by Salmonella spp.that 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 4

Why can't direct microscopy be used to provide a presumptive identification of the enteric bacteria?

Accepted Answer

A)  Some members of the genus Gram stain weakly. 
B)  The microscopic characteristics are indistinguishable from other gram-negative bacteria 
C)  Some members of the genus do not decolorize well and appear gram positive. 
D)  Some members have very thick capsules, and these do not allow the penetration of the Gram stain. 
A)  Some members of the genus Gram stain weakly. 
B)  The microscopic characteristics are indistinguishable from other gram-negative bacteria 
C)  Some members of the genus do not decolorize well and appear gram positive. 
D)  Some members have very thick capsules, and these do not allow the penetration of the Gram stain.

Question 5

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

Accepted Answer

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

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

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

Question 8

What are the primary antigens used in serologic grouping of salmonellae?

Accepted Answer

A)  Somatic A antigen and flagellar O antigens 
B)  Capsular A antigen and somatic O antigen 
C)  Flagellar H antigen and capsular A antigen 
D)  Flagellar H antigen and somatic O antigen 
A)  Somatic A antigen and flagellar O antigens 
B)  Capsular A antigen and somatic O antigen 
C)  Flagellar H antigen and capsular A antigen 
D)  Flagellar H antigen and somatic O antigen

Question 9

What disease produced by a salmonellae species 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

Question 10

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

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

Exam 19: Enterobacteriaceae

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

What organism presents as a pink colony with a halo on MacConkey media and a green metallic sheen on EMB?

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

Why can't direct microscopy be used to provide a presumptive identification of the enteric bacteria?

All of the following are clinically significant isolates of the genus Enterobacter 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?

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

What are the primary antigens used in serologic grouping of salmonellae?

What disease produced by a salmonellae species is a severe form of enteric fever?

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

Bacterial Cell Structure, physiology, Metabolism, and Genetics

Host-Parasite Interaction

Laboratory Role in Infection Control

Control of Microorganisms

Performance Improvement in the Microbiology Laboratory

Specimen Collection and Processing

Microscopic Examination of Infected Materials

Use of Colonial Morphology for the Presumptive Identification of Microorganisms

Biochemical Identification of Gram-Negative Bacteria

Immunodiagnosis of Infectious Diseases

Applications of Molecular Diagnostics

Antibiotic Mechanisms of Action and Resistance

Antimicrobial Susceptibility Testing

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Streptococcus, enterococcus, and Other Catalase-Negative Gram-Positive Cocci

Aerobic Gram-Positive Bacilli

Neisseria Species and Moraxella Catarrhalis

Haemophilus and Other Fastidious Gram-Negative Bacilli

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Nonfermenting and Miscellaneous Gram-Negative Bacilli

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Chlamydia and Rickettsia

Mycoplasma and Ureaplasma

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Diagnostic Parasitology

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Agents of Bioterror

Biofilms: Architects of Disease

Upper and Lower Respiratory Tract Infections

Skin and Soft Tissue Infections

Gastrointestinal Infections and Food Poisoning

Infections of the Central Nervous System

Bacteremia and Sepsis

Urinary Tract Infections

Genital Infections and Sexually Transmitted Diseases

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