Question 1

What virulence factor(s)do all Gram-negative bacteria share?

Accepted Answer

A)  proteases that destroy IgA antibodies 
B)  fimbriae 
C)  lipid A 
D)  a glycocalyx 
E)  both fimbriae and a glycocalyx 
A)  proteases that destroy IgA antibodies 
B)  fimbriae 
C)  lipid A 
D)  a glycocalyx 
E)  both fimbriae and a glycocalyx

Question 2

Which of the following is diagnostic for Neisseria meningitidis?

Accepted Answer

A)  the presence of Gram-negative diplococci in CSF phagocytes 
B)  a catalase positive reaction 
C)  the presence of lipid A 
D)  the lack of lipooligosaccharide 
E)  the presence of white blood cells in the CSF 
A)  the presence of Gram-negative diplococci in CSF phagocytes 
B)  a catalase positive reaction 
C)  the presence of lipid A 
D)  the lack of lipooligosaccharide 
E)  the presence of white blood cells in the CSF

Question 3

Legionnaires' disease is diagnosed by

Accepted Answer

A)  the microbe's characteristic growth on common laboratory media. 
B)  the microbe's staining properties under the microscope. 
C)  serological diagnostic procedures. 
D)  the clinical symptoms in infected patients. 
E)  the microbe's sensitivity to all antimicrobial agents. 
A)  the microbe's characteristic growth on common laboratory media. 
B)  the microbe's staining properties under the microscope. 
C)  serological diagnostic procedures. 
D)  the clinical symptoms in infected patients. 
E)  the microbe's sensitivity to all antimicrobial agents.

Question 4

Among the variety of virulence factors possessed by pathogenic enteric bacteria,which ones allow them to evade the immune surveillance of its host?

Accepted Answer

Most enteric bacteria have capsules whic

Question 5

What is the characteristic lesion of Yersinia pestis?

Accepted Answer

A)  a bubo 
B)  a chancroid 
C)  a soft chancre 
D)  petechiae 
E)  oozing abscesses in the intestinal wall 
A)  a bubo 
B)  a chancroid 
C)  a soft chancre 
D)  petechiae 
E)  oozing abscesses in the intestinal wall

Question 6

A cystic fibrosis patient develops a severe respiratory infection that resists treatment with standard antibiotics.A specimen from the lungs is greenish in color and contains aerobic motile Gram-negative bacilli.The patient is probably infected with

Accepted Answer

A)  Bordetella pertussis. 
B)  Burkholderia cepacia. 
C)  Klebsiella pneumoniae. 
D)  Pseudomonas aeruginosa. 
E)  Serratia marcescens. 
A)  Bordetella pertussis. 
B)  Burkholderia cepacia. 
C)  Klebsiella pneumoniae. 
D)  Pseudomonas aeruginosa. 
E)  Serratia marcescens.

Question 7

What biochemical test is used to distinguish between the Enterobacteriaceae and the Pasteurellaceae?

Accepted Answer

A)  lactose fermentation 
B)  oxidase test 
C)  motility 
D)  pigment production 
E)  Gram stain 
A)  lactose fermentation 
B)  oxidase test 
C)  motility 
D)  pigment production 
E)  Gram stain

Question 8

Which of the following diseases can be prevented by vaccination?

Accepted Answer

A)  typhoid fever 
B)  salmonellosis 
C)  cat scratch disease 
D)  gonorrhea 
E)  chancroid 
A)  typhoid fever 
B)  salmonellosis 
C)  cat scratch disease 
D)  gonorrhea 
E)  chancroid

Question 9

Coxiella burnetii is transmitted to humans mainly via the bite of infected tick vectors.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following diseases is transmitted by the bite of human body lice?

Accepted Answer

A)  bubonic plague 
B)  tularemia 
C)  Pontiac fever 
D)  trench fever 
E)  brucellosis 
A)  bubonic plague 
B)  tularemia 
C)  Pontiac fever 
D)  trench fever 
E)  brucellosis

Question 11

The major damage caused by Neisseria meningitidis is a result of

Accepted Answer

A)  its invasion into the central nervous system. 
B)  its presence in the respiratory tract of 40% of healthy individuals. 
C)  its ability to be transmitted by droplets among people who live in close contact. 
D)  the release of lipid A into the tissues, triggering severe inflammation and DIC. 
E)  the fact that it can survive in cells after phagocytosis. 
A)  its invasion into the central nervous system. 
B)  its presence in the respiratory tract of 40% of healthy individuals. 
C)  its ability to be transmitted by droplets among people who live in close contact. 
D)  the release of lipid A into the tissues, triggering severe inflammation and DIC. 
E)  the fact that it can survive in cells after phagocytosis.

Question 12

The pleomorphic bacterium (Coxiella/Legionella/Francisella)is an intracellular parasite that can lead to respiratory disease when inhaled in aerosols from freshwater sources.

Accepted Answer

The answer of The pleomorphic bacterium (Coxiella/Legionella/Francisella)is an intracellular parasite...

Question 13

A lung specimen from a pneumonia patient contains Gram-negative bacilli.Laboratory test results on the bacteria show they are nonmotile coliforms with a thick capsule.Which pathogen is the likely cause of the pneumonia?

Accepted Answer

A)  Escherichia coli 
B)  Enterobacter 
C)  Hafnia 
D)  Klebsiella 
E)  Serratia 
A)  Escherichia coli 
B)  Enterobacter 
C)  Hafnia 
D)  Klebsiella 
E)  Serratia

Question 14

Enterobacteriaceae are rarely pathogenic.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following pairs is mismatched?

Accepted Answer

A)  coliform Enterobacteriaceae; rapid lactose fermenters 
B)  noncoliform opportunistic Enterobacteriaceae; Proteus, Morganella 
C)  coliform Enterobacteriaceae; opportunistic pathogens 
D)  nonpathogenic Enterobacteriaceae; Salmonella, Shigella 
E)  noncoliform Enterobacteriaceae; non-lactose-fermenters 
A)  coliform Enterobacteriaceae; rapid lactose fermenters 
B)  noncoliform opportunistic Enterobacteriaceae; Proteus, Morganella 
C)  coliform Enterobacteriaceae; opportunistic pathogens 
D)  nonpathogenic Enterobacteriaceae; Salmonella, Shigella 
E)  noncoliform Enterobacteriaceae; non-lactose-fermenters

Question 16

Gonococcal infections result in lifelong immunity against Neisseria gonorrhoeae.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following toxins produced by Bordetella pertussis results in the accumulation of excess mucus in the trachea?

Accepted Answer

A)  pertussis toxin 
B)  adenylate cyclase toxin 
C)  tracheal cytotoxin 
D)  both adenylate cyclase toxin and tracheal cytotoxin 
E)  both pertussis toxin and adenylate cyclase toxin 
A)  pertussis toxin 
B)  adenylate cyclase toxin 
C)  tracheal cytotoxin 
D)  both adenylate cyclase toxin and tracheal cytotoxin 
E)  both pertussis toxin and adenylate cyclase toxin

Question 18

Lipid A causes which of the following symptoms?

Accepted Answer

A)  hemorrhaging 
B)  fever 
C)  disseminated intravascular coagulation (DI
C)  
D)  symptomatic in about 50% of the population, causing mild urethritis. 
E)  usually a bladder infection. 
A)  hemorrhaging 
B)  fever 
C)  disseminated intravascular coagulation (DI
C)  
D)  symptomatic in about 50% of the population, causing mild urethritis. 
E)  usually a bladder infection.

Question 19

Compare and contrast Yersinia pestis and Francisella tularensis with respect to clinical manifestations,mechanisms of transmission,reservoirs,and pathogenesis.

Accepted Answer

Yersinia pestis causes bubonic plague,ch

Question 20

Which of the following is the result of inhalation of aerosols of fresh water containing a bacterial parasite of protozoa?

Accepted Answer

A)  acute bacterial meningitis 
B)  meningococcal meningitis 
C)  Q fever 
D)  pertussis 
E)  Legionnaires' disease 
A)  acute bacterial meningitis 
B)  meningococcal meningitis 
C)  Q fever 
D)  pertussis 
E)  Legionnaires' disease

Exam 20: Pathogenic Gram-Negative Cocci and Bacilli

What virulence factor(s)do all Gram-negative bacteria share?

Which of the following is diagnostic for Neisseria meningitidis?

Legionnaires' disease is diagnosed by

Among the variety of virulence factors possessed by pathogenic enteric bacteria,which ones allow them to evade the immune surveillance of its host?

What is the characteristic lesion of Yersinia pestis?

A cystic fibrosis patient develops a severe respiratory infection that resists treatment with standard antibiotics.A specimen from the lungs is greenish in color and contains aerobic motile Gram-negative bacilli.The patient is probably infected with

What biochemical test is used to distinguish between the Enterobacteriaceae and the Pasteurellaceae?

Which of the following diseases can be prevented by vaccination?

Coxiella burnetii is transmitted to humans mainly via the bite of infected tick vectors.

Which of the following diseases is transmitted by the bite of human body lice?

The major damage caused by Neisseria meningitidis is a result of

The pleomorphic bacterium (Coxiella/Legionella/Francisella)is an intracellular parasite that can lead to respiratory disease when inhaled in aerosols from freshwater sources.

A lung specimen from a pneumonia patient contains Gram-negative bacilli.Laboratory test results on the bacteria show they are nonmotile coliforms with a thick capsule.Which pathogen is the likely cause of the pneumonia?

Enterobacteriaceae are rarely pathogenic.

Which of the following pairs is mismatched?

Gonococcal infections result in lifelong immunity against Neisseria gonorrhoeae.

Which of the following toxins produced by Bordetella pertussis results in the accumulation of excess mucus in the trachea?

Lipid A causes which of the following symptoms?

Compare and contrast Yersinia pestis and Francisella tularensis with respect to clinical manifestations,mechanisms of transmission,reservoirs,and pathogenesis.

Which of the following is the result of inhalation of aerosols of fresh water containing a bacterial parasite of protozoa?

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Microbial Genetics

Recombinant DNA Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Immune Disorders

Pathogenic Gram Positive Bacteria

Rickettsias, Chlamydias, Spirochetes, and Vibrios

Pathogenic Fungi

Parasitic Protozoa, Helminths, and Arthropod Vectors

Pathogenic DNA Viruses

Pathogenic RNA Viruses

Applied and Environmental Microbiology

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