Question 1

Which are considered true enteric pathogens?

Accepted Answer

A)  Salmonella
B)  Klebsiella
C)  Proteus
D)  Enterobacter
E)  ShigellaF) A) and C)
G) A) and E) A

Question 2

Whooping cough is transmitted via respiratory droplets.The___stage lasts 1-2 weeks, while the _________stage is characterized by severe coughing.

Accepted Answer

A)  primary; secondary
B)  catarrhal; paroxysmal
C)  incubation; convalescent
D)  low T-cell; high macrophage
E)  incubation; invasionF) A) and E)
G) A) and D)

Question 3

Which of the following is not correct concerning Legionnaires'disease?

Accepted Answer

A)  L.pneumophila lives in close associations with free-living amoebas.
B)  The disease is communicable from person to person.
C)  Symptoms include cough, diarrhea, and abdominal pain.
D)  It is more common in males over 50 years of age.
E)  Cases have been traced to the fallout from the Mount Saint Helen's volcano.F) C) and D)
G) A) and B)

Question 4

The pathogen that causes Legionnaires'pneumonia also causes a milder infection called Pontiac fever.

Accepted Answer

A) True 
 B)False

Question 5

All of the following are coliforms that cause opportunistic and nosocomial infections, except

Accepted Answer

A)  Enterobacter.
B)  Citrobacter.
C)  Shigella.
D)  Klebsiella.
E)  Serratia.F) A) and B)
G) A) and C)

Question 6

Shigella species have the following characteristics, except

Accepted Answer

A)  they are non-motile.
B)  they release endotoxin.
C)  they belong to Enterobacteriaceae.
D)  they infect the small intestine.
E)  they produce enterotoxin.F) A) and E)
G) A) and D)

Question 7

E.coli O157:H7 and E.coli O111:H7 differ in their

Accepted Answer

A)  Gram reaction.
B)  capsular antigen.
C)  flagellar antigen.
D)  cell wall antigen.E) A) and B)
F) A) and D)

Question 8

Pseudomonas is an enteric gram-negative rod.

Accepted Answer

A) True 
 B)False

Question 9

Typhoid fever has the following characteristics, except

Accepted Answer

A)  it is spread by handling reptiles.
B)  it is transmitted by ingesting fecally contaminated food and water.
C)  chronic carriers harbor the pathogens in their gallbladder.
D)  it can infect the small intestine with fever, diarrhea, and abdominal pain.
E)  it can become a septicemia, spread to lymph nodes and spleen, and cause liver abscesses.F) B) and E)
G) A) and E) A

Question 10

Pasteurization of milk helps to prevent

Accepted Answer

A)  tularemia.
B)  pertussis.
C)  legionellosis.
D)  brucellosis.
E)  shigellosis.F) B) and C)
G) C) and D)

Question 11

Which of the following bacterial genera contain members that are very similar physiologically to Pseudomonas and cause a similar spectrum of opportunistic infections?

Accepted Answer

A)  Hemophilus
B)  Stenotrophomonas
C)  Burkholderia
D)  Legionella
E)  both Burkholderia and StenotrophomonasF) All of these choices are correct.G) A) and E)
H) B) and F)

Question 12

Which of the following is an agent of the sexually-transmitted disease chancroid?

Accepted Answer

A)  Haemophilus aegyptius
B)  Haemophilus influenzae
C)  Haemophilus parainfluenzae
D)  Haemophilus ducreyi
E)  Haemophilus aphrophilusF) B) and D)
G) C) and D) D

Question 13

A cause of epiglottitis in children and young adults is

Accepted Answer

A)  Haemophilus influenzae.
B)  Haemophilus ducreyi.
C)  Haemophilus aegyptius.
D)  Haemophilus parainfluenzae.
E)  Haemophilus aphrophilus.F) C) and E)
G) A) and D)

Question 14

Distinguish the four different pathogenic strains of
E.coli with regard to: a) names of the strains, b) virulence factors, and c) symptoms.

Accepted Answer

a) The four different pathogenic strains...

Question 15

Chancroid is characterized by

Accepted Answer

A)  sexually transmission.
B)  geographical distribution in the tropics and subtropics.
C)  lesions which develop at the portal of entry.
D)  bubo-like swelling of the lymph nodes.
E)  All of these choices are correct.F) A) and B)
G) A) and C)

Question 16

Compare and contrast shigellosis and salmonellosis.

Accepted Answer

Shigellosis and salmonellosis are both b...

Question 17

Exotoxins that target and bind to surface receptors of the intestinal lining are specifically termed _____.

Accepted Answer

The answer of Exotoxins that target and bind to surface...

Question 18

Species of Shigella are characteristically non-motile.Based on this information you ca predict that members of the Shigella genus

Accepted Answer

A)  have K antigens.
B)  do not have H antigens.
C)  will not grow on MacConkey agar.
D)  will not have O antigens.E) None of the above
F) B) and C)

Question 19

Klebsiella has a large _____ that contributes to its ability to cause chronic lung infections.

Accepted Answer

The answer of Klebsiella has a large _____ that contributes...

Question 20

Yersinia pestis

Accepted Answer

A)  was virulent in the Middle Ages but is no longer virulent.
B)  has humans as an endemic reservoir.
C)  does not respond to antimicrobic drugs.
D)  is usually transmitted by a flea vector.
E)  All of these choices are correct.F) B) and D)
G) C) and D)

Exam 20: The Gram-Negative Bacilli of Medical Importance

Which are considered true enteric pathogens?

Correct AnswerverifiedA

Whooping cough is transmitted via respiratory droplets.The___stage lasts 1-2 weeks, while the _________stage is characterized by severe coughing.

Correct AnswerverifiedShow Answer

Which of the following is not correct concerning Legionnaires'disease?

Correct AnswerverifiedShow Answer

The pathogen that causes Legionnaires'pneumonia also causes a milder infection called Pontiac fever.

Correct AnswerverifiedShow Answer

All of the following are coliforms that cause opportunistic and nosocomial infections, except

Correct AnswerverifiedShow Answer

Shigella species have the following characteristics, except

Correct AnswerverifiedShow Answer

E.coli O157:H7 and E.coli O111:H7 differ in their

Correct AnswerverifiedShow Answer

Pseudomonas is an enteric gram-negative rod.

Correct AnswerverifiedShow Answer

Typhoid fever has the following characteristics, except

Correct AnswerverifiedA

Pasteurization of milk helps to prevent

Correct AnswerverifiedShow Answer

Which of the following bacterial genera contain members that are very similar physiologically to Pseudomonas and cause a similar spectrum of opportunistic infections?

Correct AnswerverifiedShow Answer

Which of the following is an agent of the sexually-transmitted disease chancroid?

Correct AnswerverifiedD

A cause of epiglottitis in children and young adults is

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Distinguish the four different pathogenic strains of E.coli with regard to: a) names of the strains, b) virulence factors, and c) symptoms.

Correct AnswerAnswered by ExamLex AIa) The four different pathogenic strains...View AnswerShow Answer

Chancroid is characterized by

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Compare and contrast shigellosis and salmonellosis.

Correct AnswerAnswered by ExamLex AIShigellosis and salmonellosis are both b...View AnswerShow Answer

Exotoxins that target and bind to surface receptors of the intestinal lining are specifically termed _____.

Correct AnswerverifiedShow Answer

Species of Shigella are characteristically non-motile.Based on this information you ca predict that members of the Shigella genus

Correct AnswerverifiedShow Answer

Klebsiella has a large _____ that contributes to its ability to cause chronic lung infections.

Correct AnswerverifiedShow Answer

Yersinia pestis

Correct AnswerverifiedShow Answer

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Whooping cough is transmitted via respiratory droplets.The_stage lasts 1-2 weeks, while the _______stage is characterized by severe coughing.

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a) The four different pathogenic strains...
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Shigellosis and salmonellosis are both b...
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