Question 1

An axenic environment is one

Accepted Answer

A)   in which microorganisms remain with the person throughout life.
B)   that is free of microbes.
C)   that is a source of contamination.
D)   in which microorganisms remain present only for a short time.
E)   contaminated by microbial toxins.F) B) and D)
G) B) and E)

Question 2

Which of the following is NOT an example of a zoonosis?

Accepted Answer

A)   typhus
B)   rabies
C)   typhoid fever
D)   salmonellosis
E)   anthraxF) A) and B)
G) All of the above

Question 3

An infection always leads to disease.

Accepted Answer

A) True 
 B)False

Question 4

A common cold is an example of a chronic disease.

Accepted Answer

A) True 
 B)False

Question 5

Diseases that are naturally spread from their usual animal hosts to humans are known as __________.

Accepted Answer

The answer of Diseases that are naturally spread from their...

Question 6

Which of the following pairings of microbe and disease was disproven using Koch's postulates?

Accepted Answer

A)   HIV and AIDS
B)   Mycobacterium leprae and leprosy
C)   Hepatitis B and D and liver cancer
D)   Varicella-zoster virus and chickenpox
E)   Haemophilus influenzae and the fluF) B) and D)
G) D) and E)

Question 7

Chagas' disease is transmitted by a bug with mouthparts that penetrate blood vessels. Which type of exposure does this represent?

Accepted Answer

A)   mucous membrane portal
B)   parenteral route
C)   skin portal
D)   contact
E)   fomiteF) A) and D)
G) B) and D)

Question 8

Researchers have proposed that the herpesvirus responsible for the childhood illness roseola may cause a type of T cell leukemia. Ninety percent of the population has been infected by the virus by two years of age, but the T cell leukemia is relatively rare. The virus can be cultured in the laboratory in tissue culture, but not in mature organisms. Discuss the obstacles to applying Koch's postulates to the etiology of this disease.

Accepted Answer

Koch's first postulate, that the suspect...

Question 9

Neurotoxins interfere with the __________ function of the host.

Accepted Answer

The answer of Neurotoxins interfere with the __________ function of...

Question 10

Fomites cause disease by direct contact.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is an example of an exotoxin?

Accepted Answer

A)   neurotoxins
B)   coagulase
C)   lipid A
D)   streptokinase
E)   collagenaseF) None of the above
G) A) and B)

Question 12

All diseases go through the stages known as incubation period, prodromal period, and illness.

Accepted Answer

A) True 
 B)False

Question 13

Commensalism is best described as

Accepted Answer

A)   an unsuccessful microbial invasion due to the presence of preexisting microbes.
B)   a relationship between two organisms where only one member benefits and the other is unharmed.
C)   a relationship between two organisms where both members benefit.
D)   a relationship in which a microorganism causes disease.
E)   a source of contamination.F) A) and D)
G) B) and D)

Question 14

Which of the following is a sign of disease?

Accepted Answer

A)   headache
B)   dizziness
C)   fever
D)   nausea
E)   crampsF) A) and B)
G) C) and E)

Question 15

Which of the following is NOT an example of symbiosis?

Accepted Answer

A)   bacteria in the human colon
B)   tapeworm in the human intestine
C)   tuberculosis in the human lung
D)   protozoa in termites
E)   microbes passing across the placenta to the fetusF) A) and E)
G) C) and D)

Question 16

Fomites are

Accepted Answer

A)   insects that transmit pathogens from an infected host to a noninfected host.
B)   inanimate objects involved in the indirect contact transmission of pathogens.
C)   fecal material from infected hosts.
D)   animal sources for human pathogens.
E)   silent carriers of infectious diseases.F) A) and B)
G) A) and C)

Question 17

Which of the following is NOT considered a type of vehicle transmission of a pathogen?

Accepted Answer

A)   via animals
B)   via air
C)   via drinking water
D)   via food
E)   via body fluidF) A) and E)
G) C) and D)

Question 18

What is a nosocomial infection? List the different types of nosocomial infections.

Accepted Answer

Nosocomial infections are those acquired...

Question 19

The study of when and where diseases occur is known as __________ epidemiology.

Accepted Answer

The answer of The study of when and where diseases...

Question 20

Which of the following situations might cause normal microbiota to become opportunistic pathogens?

Accepted Answer

A)   growth of microbes on the surface of intact skin
B)   growth of microorganisms on the excreted cellular wastes and dead cells in the large intestine
C)   treatment of a cancer patient with radiation
D)   growth of Lactobacillus on the surface of teeth
E)   presence of Entamoeba in the lumen of the sigmoid colonF) A) and B)
G) B) and C)

Exam 14: Infection, Infectious Diseases, and Epidemiology

What is a nosocomial infection? List the different types of nosocomial infections.

Correct Answer
verified
Nosocomial infections are those acquired...
View Answer

Which of the following is NOT considered a type of vehicle transmission of a pathogen?

Correct Answer
verified

A common cold is an example of a chronic disease.

Correct Answer
verified

Which of the following pairings of microbe and disease was disproven using Koch's postulates?

Correct Answer
verified

Which of the following is a sign of disease?

Correct Answer
verified

Which of the following is an example of an exotoxin?

Correct Answer
verified

Neurotoxins interfere with the __________ function of the host.

Correct Answer
verified

The study of when and where diseases occur is known as __________ epidemiology.

Correct Answer
verified

Fomites cause disease by direct contact.

Correct Answer
verified

Which of the following is NOT an example of a zoonosis?

Correct Answer
verified

Correct Answer
verified
Koch's first postulate, that the suspect...
View Answer

Diseases that are naturally spread from their usual animal hosts to humans are known as __________.

Correct Answer
verified

An infection always leads to disease.

Correct Answer
verified

An axenic environment is one

Correct Answer
verified

Commensalism is best described as

Correct Answer
verified

Fomites are

Correct Answer
verified

All diseases go through the stages known as incubation period, prodromal period, and illness.

Correct Answer
verified

Which of the following situations might cause normal microbiota to become opportunistic pathogens?

Correct Answer
verified

Chagas' disease is transmitted by a bug with mouthparts that penetrate blood vessels. Which type of exposure does this represent?

Correct Answer
verified

Which of the following is NOT an example of symbiosis?

Correct Answer
verified

Exam 14: Infection, Infectious Diseases, and Epidemiology

What is a nosocomial infection? List the different types of nosocomial infections.

Correct AnswerverifiedNosocomial infections are those acquired...View AnswerShow Answer

Which of the following is NOT considered a type of vehicle transmission of a pathogen?

Correct AnswerverifiedShow Answer

A common cold is an example of a chronic disease.

Correct AnswerverifiedShow Answer

Which of the following pairings of microbe and disease was disproven using Koch's postulates?

Correct AnswerverifiedShow Answer

Which of the following is a sign of disease?

Correct AnswerverifiedShow Answer

Which of the following is an example of an exotoxin?

Correct AnswerverifiedShow Answer

Neurotoxins interfere with the __________ function of the host.

Correct AnswerverifiedShow Answer

The study of when and where diseases occur is known as __________ epidemiology.

Correct AnswerverifiedShow Answer

Fomites cause disease by direct contact.

Correct AnswerverifiedShow Answer

Which of the following is NOT an example of a zoonosis?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedKoch's first postulate, that the suspect...View AnswerShow Answer

Diseases that are naturally spread from their usual animal hosts to humans are known as __________.

Correct AnswerverifiedShow Answer

An infection always leads to disease.

Correct AnswerverifiedShow Answer

An axenic environment is one

Correct AnswerverifiedShow Answer

Commensalism is best described as

Correct AnswerverifiedShow Answer

Fomites are

Correct AnswerverifiedShow Answer

All diseases go through the stages known as incubation period, prodromal period, and illness.

Correct AnswerverifiedShow Answer

Which of the following situations might cause normal microbiota to become opportunistic pathogens?

Correct AnswerverifiedShow Answer

Chagas' disease is transmitted by a bug with mouthparts that penetrate blood vessels. Which type of exposure does this represent?

Correct AnswerverifiedShow Answer

Which of the following is NOT an example of symbiosis?

Correct AnswerverifiedShow Answer

Correct Answer
verified
Nosocomial infections are those acquired...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
verified
Koch's first postulate, that the suspect...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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