Question 1

In which of the following situations would Staphylococcus epidermidis be the most likely etiologic agent?

Accepted Answer

A) otitis media 
B) food intoxication 
C) urinary bladder infection 
D) infected IV catheter site 
E) conjunctivitis 
A) otitis media 
B) food intoxication 
C) urinary bladder infection 
D) infected IV catheter site 
E) conjunctivitis

Question 2

Neisseria meningitidis and Neisseria gonorrhoeae are fastidious, gram-negative cocci that produce oxidase.

Accepted Answer

A) True 
 B)False

Question 3

Discuss how normal flora Staphylococcus epidermidis can cause disease in the body, and describe the diseases that it causes.

Accepted Answer

Staphylococcus epidermidis is a type of

Question 4

Which is incorrect about Staphylococcus aureus food intoxication?

Accepted Answer

A) Food becomes contaminated by a human carrier. 
B) Common associated foods include custards, ham, cream pastries, processed meats. 
C) After contamination, food must be left unrefrigerated for a few hours. 
D) Ingestion of the pathogen allows it to multiply and damage the GI tract lining. 
E) Symptoms come on quickly, and include nausea, vomiting, diarrhea. 
A) Food becomes contaminated by a human carrier. 
B) Common associated foods include custards, ham, cream pastries, processed meats. 
C) After contamination, food must be left unrefrigerated for a few hours. 
D) Ingestion of the pathogen allows it to multiply and damage the GI tract lining. 
E) Symptoms come on quickly, and include nausea, vomiting, diarrhea.

Question 5

Scarlet fever involves

Accepted Answer

A) high fever. 
B) bright red rash on face, trunk, inner arms and legs, and tongue. 
C) eventual desquamation of epidermis. 
D) septicemia as a complication. 
E) All of these choices are correct. 
A) high fever. 
B) bright red rash on face, trunk, inner arms and legs, and tongue. 
C) eventual desquamation of epidermis. 
D) septicemia as a complication. 
E) All of these choices are correct.

Question 6

The bright red rash and fever of scarlet fever is due to

Accepted Answer

A) enterotoxins. 
B) hemolysins. 
C) toxic shock syndrome toxin. 
D) exfoliative toxin. 
E) erythrogenic toxin. 
A) enterotoxins. 
B) hemolysins. 
C) toxic shock syndrome toxin. 
D) exfoliative toxin. 
E) erythrogenic toxin.

Question 7

All of the following are correct about Streptococcus pyogenes, except

Accepted Answer

A) humans are the only significant reservoir. 
B) some of the streptococcal toxins act as superantigens. 
C) most strains do not have a capsule. 
D) it can cause impetigo and erysipelas. 
E) infection is generally through direct contact. 
A) humans are the only significant reservoir. 
B) some of the streptococcal toxins act as superantigens. 
C) most strains do not have a capsule. 
D) it can cause impetigo and erysipelas. 
E) infection is generally through direct contact.

Question 8

A 48-year old man has had nasal surgery and absorbent material has been inserted into his nasal cavity to control bleeding.Several hours ago he began to complain of a headache and has since developed a red rash over much of his body and is experiencing muscle cramps and diarrhea.His blood pressure has dropped to 75/50 mg Hg.This patient's illness is most likely caused by

Accepted Answer

A) Staphylococcus aureus - exfoliative toxin 
B) Streptococcus pyogenes - streptolysin O 
C) Staphylococcus aureus - toxic shock syndrome toxin 
D) Streptococcus pyogenes - erythrogenic toxin 
A) Staphylococcus aureus - exfoliative toxin 
B) Streptococcus pyogenes - streptolysin O 
C) Staphylococcus aureus - toxic shock syndrome toxin 
D) Streptococcus pyogenes - erythrogenic toxin

Question 9

Meningococcemia is

Accepted Answer

A) common during gonorrhea. 
B) associated with vascular hemorrhage and petechiae. 
C) frequently seen in elderly. 
D) caused by a gram-positive diplococcus. 
E) All of these choices are correct. 
A) common during gonorrhea. 
B) associated with vascular hemorrhage and petechiae. 
C) frequently seen in elderly. 
D) caused by a gram-positive diplococcus. 
E) All of these choices are correct.

Question 10

All of the following pertain to Neisseria meningitidis, except

Accepted Answer

A) virulence factors include a capsule, pili, endotoxin, and IgA protease. 
B) it causes serious meningitis. 
C) the reservoir is the nasopharynx of human carriers. 
D) it is more easily transmitted in day-care facilities, dorms, and military barracks. 
E) it is a common cause of bacterial pneumonia. 
A) virulence factors include a capsule, pili, endotoxin, and IgA protease. 
B) it causes serious meningitis. 
C) the reservoir is the nasopharynx of human carriers. 
D) it is more easily transmitted in day-care facilities, dorms, and military barracks. 
E) it is a common cause of bacterial pneumonia.

Question 11

The two important hemolysins of Group A streptococci are _____ and _____.

Accepted Answer

streptolys

Question 12

An individual with asymptomatic N.gonorrhoeae may not spread the disease.

Accepted Answer

A) True 
 B)False

Question 13

Which pathogen has drug-resistant strains called MRSA?

Accepted Answer

A) Staphylococcus aureus 
B) Staphylococcus epidermidis 
C) Staphylococcus saprophyticus 
D) Streptococcus pyogenes 
E) Streptococcus agalactiae 
A) Staphylococcus aureus 
B) Staphylococcus epidermidis 
C) Staphylococcus saprophyticus 
D) Streptococcus pyogenes 
E) Streptococcus agalactiae

Question 14

A positive Quellung reaction, or capsular swelling, is confirmatory for

Accepted Answer

A) Neisseria meningitidis. 
B) Staphylococcus aureus. 
C) Streptococcus pyogenes. 
D) Branhamella (Moraxella) catarrhalis. 
E) Streptococcus pneumoniae. 
A) Neisseria meningitidis. 
B) Staphylococcus aureus. 
C) Streptococcus pyogenes. 
D) Branhamella (Moraxella) catarrhalis. 
E) Streptococcus pneumoniae.

Question 15

Infections caused by Staphylococcus aureus include all of the following, except

Accepted Answer

A) folliculitis. 
B) furuncles and carbuncles. 
C) sore throat. 
D) osteomyelitis. 
E) pneumonia. 
A) folliculitis. 
B) furuncles and carbuncles. 
C) sore throat. 
D) osteomyelitis. 
E) pneumonia.

Question 16

All the following pertain to Staphylococcus epidermidis infections, except

Accepted Answer

A) they often develop from an endogenous source. 
B) they typically occur after insertion of shunts and prosthetic devices. 
C) catheterization can introduce the organism and lead to urinary tract infection. 
D) the organism is coagulase negative. 
E) the organism produces a large number of tissue damaging enzymes and toxins. 
A) they often develop from an endogenous source. 
B) they typically occur after insertion of shunts and prosthetic devices. 
C) catheterization can introduce the organism and lead to urinary tract infection. 
D) the organism is coagulase negative. 
E) the organism produces a large number of tissue damaging enzymes and toxins.

Question 17

Rebecca Lancefield differentiated streptococci on the basis of differences in their

Accepted Answer

A) cell wall carbohydrates in a serological test. 
B) patterns of hemolysis on blood agar. 
C) ability to produce catalase. 
D) Gram stain appearance. 
E) All of these choices are correct. 
A) cell wall carbohydrates in a serological test. 
B) patterns of hemolysis on blood agar. 
C) ability to produce catalase. 
D) Gram stain appearance. 
E) All of these choices are correct.

Question 18

Disease/s caused by Streptococcus pneumoniae include

Accepted Answer

A) otitis media. 
B) meningitis. 
C) lobar pneumonia. 
D) bronchial pneumonia. 
E) All of these choices are correct. 
A) otitis media. 
B) meningitis. 
C) lobar pneumonia. 
D) bronchial pneumonia. 
E) All of these choices are correct.

Question 19

Streptokinase causes the symptoms of scarlet fever.

Accepted Answer

A) True 
 B)False

Question 20

Which chemical produced by S.aureus is also known as "spreading factor"?

Accepted Answer

A) coagulase 
B) penicillinase 
C) hemolysin 
D) hyaluronidase 
E) toxic shock syndrome toxin 
A) coagulase 
B) penicillinase 
C) hemolysin 
D) hyaluronidase 
E) toxic shock syndrome toxin

Exam 18: The Gram-Positive and Gram-Negative Cocci of Medical Importance

In which of the following situations would Staphylococcus epidermidis be the most likely etiologic agent?

Neisseria meningitidis and Neisseria gonorrhoeae are fastidious, gram-negative cocci that produce oxidase.

Discuss how normal flora Staphylococcus epidermidis can cause disease in the body, and describe the diseases that it causes.

Which is incorrect about Staphylococcus aureus food intoxication?

Scarlet fever involves

The bright red rash and fever of scarlet fever is due to

All of the following are correct about Streptococcus pyogenes, except

Meningococcemia is

All of the following pertain to Neisseria meningitidis, except

The two important hemolysins of Group A streptococci are _____ and _____.

An individual with asymptomatic N.gonorrhoeae may not spread the disease.

Which pathogen has drug-resistant strains called MRSA?

A positive Quellung reaction, or capsular swelling, is confirmatory for

Infections caused by Staphylococcus aureus include all of the following, except

All the following pertain to Staphylococcus epidermidis infections, except

Rebecca Lancefield differentiated streptococci on the basis of differences in their

Disease/s caused by Streptococcus pneumoniae include

Streptokinase causes the symptoms of scarlet fever.

Which chemical produced by S.aureus is also known as "spreading factor"?

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods of Studying Microorganisms

A Survey of Prokaryotic Cells and Microorganisms

A Survey of Eukaryotic Cells and Microorganisms

An Introduction to Viruses

Microbial Nutrition, Ecology, and Growth

An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering: a Revolution in Molecular Biology

Physical and Chemical Agents for Microbial Control

Drugs, Microbes, Host--The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

An Introduction to Host Defenses and Innate Immunities

Adaptive, Specific Immunity and Immunization

Disorders in Immunity

Procedures for Identifying Pathogens and Diagnosing Infections

The Gram-Positive Bacilli of Medical Importance

The Gram-Negative Bacilli of Medical Importance

Miscellaneous Bacterial Agents of Disease

The Fungi of Medical Importance

The Parasites of Medical Importance

Introduction to Viruses That Infect Humans: the Dna Viruses

The Rna Viruses That Infect Humans

Environmental Microbiology

Applied and Industrial Microbiology

Filters

The two important hemolysins of Group A streptococci are _ and _.