Question 1

How do group A streptococci camouflage themselves from white blood cells?

Accepted Answer

A)  they produce coagulase, allowing the bacteria to hide within blood clots. 
B)  they grow in chains or pairs. 
C)  they produce streptokinase, which breaks down blood clots. 
D)  they have hyaluronic acid capsules. 
E)  they have a coating of protein M. 
A)  they produce coagulase, allowing the bacteria to hide within blood clots. 
B)  they grow in chains or pairs. 
C)  they produce streptokinase, which breaks down blood clots. 
D)  they have hyaluronic acid capsules. 
E)  they have a coating of protein M.

Question 2

Would Clostridium botulinum be a good microorganism to use for biological warfare? Explain.

Accepted Answer

Clostridium botulinum is an anaerobic,en

Question 3

Which of the following is an antiphagocytic factor of Staphylococcus?

Accepted Answer

A)  protein A 
B)  catalase 
C)  hemolysin 
D)  protein M 
E)  hyaluronidase 
A)  protein A 
B)  catalase 
C)  hemolysin 
D)  protein M 
E)  hyaluronidase

Question 4

What is one virulence factor that differentiates Staphylococcus aureus from other species of staphylococci?

Accepted Answer

A)  It has a capsule. 
B)  It can produce coagulase. 
C)  It produces catalase. 
D)  it can live on the surface of the skin and in cutaneous oil glands. 
E)  it produces lipase. 
A)  It has a capsule. 
B)  It can produce coagulase. 
C)  It produces catalase. 
D)  it can live on the surface of the skin and in cutaneous oil glands. 
E)  it produces lipase.

Question 5

A woman comes to the emergency department with fever and vomiting.She soon develops a red rash all over her body,and her blood pressure begins to drop.What is a likely diagnosis?

Accepted Answer

A)  erysipelas 
B)  endocarditis 
C)  scarlet fever 
D)  toxic shock syndrome 
E)  staphylococcal food poisoning 
A)  erysipelas 
B)  endocarditis 
C)  scarlet fever 
D)  toxic shock syndrome 
E)  staphylococcal food poisoning

Question 6

Which of the following diseases is considered an autoimmune disease triggered by bacterial infection?

Accepted Answer

A)  glomerulonephritis caused by the group A streptococci 
B)  scarlet fever 
C)  rheumatic fever 
D)  impetigo 
E)  toxic shock syndrome 
A)  glomerulonephritis caused by the group A streptococci 
B)  scarlet fever 
C)  rheumatic fever 
D)  impetigo 
E)  toxic shock syndrome

Question 7

Streptococci are frequently classified by

Accepted Answer

A)  Lancefield antigen designations. 
B)  the type of enzymes the bacteria produce. 
C)  their staining properties. 
D)  their ability to produce a capsule. 
E)  the diseases they produce. 
A)  Lancefield antigen designations. 
B)  the type of enzymes the bacteria produce. 
C)  their staining properties. 
D)  their ability to produce a capsule. 
E)  the diseases they produce.

Question 8

An opportunistic pathogen frequently seen in AIDS patients,________ spreads rapidly to various organs.

Accepted Answer

A)  Mycobacterium tuberculosis 
B)  Mycobacterium avium-intracellulare 
C)  Mycobacterium leprae 
D)  Mycobacterium bovis 
E)  Mycobacterium ulcerans 
A)  Mycobacterium tuberculosis 
B)  Mycobacterium avium-intracellulare 
C)  Mycobacterium leprae 
D)  Mycobacterium bovis 
E)  Mycobacterium ulcerans

Question 9

The bacterium Streptococcus mutans has a major role in the development of dental plaque and caries.

Accepted Answer

A) True 
 B)False

Question 10

Staphylococcus aureus food poisoning is long-lasting because ingested bacteria produce enterotoxins in the digestive system.

Accepted Answer

A) True 
 B)False

Question 11

The ability to produce (hyaluronidase/lipase/proteases)enables Staphylococcus aureus to penetrate and spread through tissues.

Accepted Answer

The answer of The ability to produce (hyaluronidase/lipase/proteases)enables Staphylococcus aureus...

Question 12

A throat swab is taken from a patient with a respiratory infection.After 24 hours,1- to 3-mm colonies develop,which are round,mucoid,nonpigmented,and dimpled in the middle.What is the most likely pathogen,and how could you confirm the diagnosis on the culture?

Accepted Answer

The colonies described are characteristi

Question 13

Eating food contaminated with ________ may result in meningitis in at-risk persons.

Accepted Answer

A)  Mycoplasma hominis 
B)  Staphylococcus aureus 
C)  Listeria monocytogenes 
D)  Clostridium perfringens 
E)  Enterococcus faecalis 
A)  Mycoplasma hominis 
B)  Staphylococcus aureus 
C)  Listeria monocytogenes 
D)  Clostridium perfringens 
E)  Enterococcus faecalis

Question 14

The respiratory infection known as primary atypical pneumonia is caused by Mycoplasma pneumoniae.

Accepted Answer

A) True 
 B)False

Question 15

Staphylococcus aureus can produce a toxin that dissolves the desmosomes that hold the adjoining cytoplasmic membranes of cells together and causes the patient's skin cells to separate.

Accepted Answer

A) True 
 B)False

Question 16

Streptococcus pyogenes produces (hemolysin/protein A/M protein)and thereby avoids phagocytosis.

Accepted Answer

The answer of Streptococcus pyogenes produces (hemolysin/protein A/M protein)and thereby...

Question 17

Anthrax,which means "charcoal" in Greek,derives its name from

Accepted Answer

A)  the airborne endospores it produces. 
B)  the staining properties of the bacillus under the microscope. 
C)  the black eschars it produces on human skin. 
D)  its ability to invade the bloodstream and produce toxemia. 
E)  the high mortality it causes in infected individuals. 
A)  the airborne endospores it produces. 
B)  the staining properties of the bacillus under the microscope. 
C)  the black eschars it produces on human skin. 
D)  its ability to invade the bloodstream and produce toxemia. 
E)  the high mortality it causes in infected individuals.

Question 18

Streptococcus agalactiae is associated with which of the following diseases?

Accepted Answer

A)  neonatal bacteremia 
B)  neonatal meningitis 
C)  neonatal pneumonia 
D)  both neonatal bacteremia and neonatal meningitis 
E)  neonatal bacteremia, neonatal meningitis, and neonatal pneumonia 
A)  neonatal bacteremia 
B)  neonatal meningitis 
C)  neonatal pneumonia 
D)  both neonatal bacteremia and neonatal meningitis 
E)  neonatal bacteremia, neonatal meningitis, and neonatal pneumonia

Question 19

Which of the following is a key diagnostic indicator of infection with Mycobacterium leprae?

Accepted Answer

A)  blister-like lesions 
B)  a distinctive red rash that lasts for days 
C)  pus-filled abscesses 
D)  localized loss of the sense of touch 
E)  severe inflammation with swelling 
A)  blister-like lesions 
B)  a distinctive red rash that lasts for days 
C)  pus-filled abscesses 
D)  localized loss of the sense of touch 
E)  severe inflammation with swelling

Question 20

A large number of patrons of a restaurant in a large city develop symptoms of food poisoning.Officials collect several foods that are suspected in the episode.Which of the Gram-positive bacteria in this chapter may be responsible for the food poisoning? How do health officials determine which bacterium is the culprit?

Accepted Answer

Possible causative agents include Staphy

Exam 19: Pathogenic Gram Positive Bacteria

How do group A streptococci camouflage themselves from white blood cells?

Would Clostridium botulinum be a good microorganism to use for biological warfare? Explain.

Which of the following is an antiphagocytic factor of Staphylococcus?

What is one virulence factor that differentiates Staphylococcus aureus from other species of staphylococci?

A woman comes to the emergency department with fever and vomiting.She soon develops a red rash all over her body,and her blood pressure begins to drop.What is a likely diagnosis?

Which of the following diseases is considered an autoimmune disease triggered by bacterial infection?

Streptococci are frequently classified by

An opportunistic pathogen frequently seen in AIDS patients,________ spreads rapidly to various organs.

The bacterium Streptococcus mutans has a major role in the development of dental plaque and caries.

Staphylococcus aureus food poisoning is long-lasting because ingested bacteria produce enterotoxins in the digestive system.

The ability to produce (hyaluronidase/lipase/proteases)enables Staphylococcus aureus to penetrate and spread through tissues.

A throat swab is taken from a patient with a respiratory infection.After 24 hours,1- to 3-mm colonies develop,which are round,mucoid,nonpigmented,and dimpled in the middle.What is the most likely pathogen,and how could you confirm the diagnosis on the culture?

Eating food contaminated with ________ may result in meningitis in at-risk persons.

The respiratory infection known as primary atypical pneumonia is caused by Mycoplasma pneumoniae.

Staphylococcus aureus can produce a toxin that dissolves the desmosomes that hold the adjoining cytoplasmic membranes of cells together and causes the patient's skin cells to separate.

Streptococcus pyogenes produces (hemolysin/protein A/M protein)and thereby avoids phagocytosis.

Anthrax,which means "charcoal" in Greek,derives its name from

Streptococcus agalactiae is associated with which of the following diseases?

Which of the following is a key diagnostic indicator of infection with Mycobacterium leprae?

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-Negative Cocci and Bacilli

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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