Question 1

Louse-borne relapsing fever is caused by a spirochete known as Borrelia (burgdorferi/recurrentis/interrogans),which is capable of frequently changing its antigenic surface components.

Accepted Answer

The answer of Louse-borne relapsing fever is caused by a...

Question 2

Transovarian transmission is a process in which

Accepted Answer

A)   a pathogen infects the ovaries of the host.
B)   a pathogen is transmitted to the host when the host ingests contaminated eggs.
C)   an infected female vector transmits the pathogen to the eggs forming in its ovaries.
D)   the pathogen is transmitted from an infected male to a healthy female during mating.
E)   the pathogen is spread from one host to the next by unprotected sexual intercourse.

Question 3

The (body louse/cat flea/dog tick)is the primary vector of epidemic typhus.

Accepted Answer

The answer of The (body louse/cat flea/dog tick)is the primary...

Question 4

Compare and contrast the pathogenesis of the sexually transmitted diseases chlamydia and syphilis.

Accepted Answer

Chlamydia is caused by the intracellular...

Question 5

Which of the following is the correct pairing of rickettsial pathogen and vector?

Accepted Answer

A)   R. rickettsia; flea
B)   R typhi; tick
C)   R prowazekii; louse
D)   R. typhi; mite
E)   R rickettsia; louse

Question 6

People living in the northeastern United States are more at risk for exposure to which of the following rickettsias?

Accepted Answer

A)   Rickettsia rickettsii
B)   Rickettsia typhi
C)   Ehrlichia chaffeensis
D)   Orientia tsutsugamushi
E)   Rickettsia prowazekii

Question 7

Helicobacter pylori produces (cytotoxin/hyaluronidase/urease),a unique virulence factor important to colonizing the digestive system.

Accepted Answer

The answer of Helicobacter pylori produces (cytotoxin/hyaluronidase/urease),a unique virulence factor...

Question 8

Rickettsia prowazekii is transmitted by

Accepted Answer

A)   mites of the genus Leptotrombidium.
B)   the rat flea Xenopsylla cheopis.
C)   the human body louse Pediculus humanus.
D)   the dog tick Dermacentor.
E)   the cat flea Ctenocephalides felis.

Question 9

The pattern of fever shown in Figure 21.1 is most commonly seen with

Accepted Answer

A)   yaws.
B)   Lyme disease.
C)   lymphogranuloma venereum.
D)   syphilis.
E)   relapsing fever.

Question 10

Chlamydia trachomatis produces a dormant,resistant stage for transmission from one host to another.

Accepted Answer

A) True 
 B)False

Question 11

The intracellular parasite ________ infects cells of the conjunctiva and mucous membranes throughout the body.

Accepted Answer

A)   Anaplasma phagocytophilium
B)   Chlamydia trachomatis
C)   Orientia tsutsugamushi
D)   Ehrlichia caffeensis
E)   Helicobacter pylori

Question 12

Which of the following diseases is considered an emerging disease because it was unknown before 1987?

Accepted Answer

A)   anaplasmosis
B)   Brill-Zinsser disease
C)   murine typhus
D)   Rocky Mountain spotted fever
E)   lymphogranuloma venereum

Question 13

Which of the following causes pinta,a skin disease primarily of children,in which spirochetes are detectable in specimens from the lesions?

Accepted Answer

A)   Borrelia recurrentis
B)   Leptospira interrogans
C)   Treponema carateum
D)   Treponema pallidum pertenue
E)   Treponema pallidum pallidum

Question 14

The characteristic lesion for tertiary syphilis is the presence of (gummas/necrosis/granulomas)in bones,in nervous tissue,or on the skin.

Accepted Answer

The answer of The characteristic lesion for tertiary syphilis is...

Question 15

An expanding rash that resembles a bull's-eye is a characteristic of secondary syphilis.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following microorganisms have been referred to as energy parasites?

Accepted Answer

A)   rickettsias
B)   vibrios
C)   chlamydias
D)   spirochetes
E)   Borrelia

Question 17

The endosomes of cells infected with chlamydia are filled up with the form known as

Accepted Answer

A)   elementary bodies.
B)   reticulate bodies.
C)   inclusion bodies.
D)   initial bodies.
E)   morula.

Question 18

The zoonosis known as RMSF is the result of infection with Rickettsia (prowazekii/rickettsii/typhi).

Accepted Answer

The answer of The zoonosis known as RMSF is the...

Question 19

Which of the following statements regarding trachoma is FALSE?

Accepted Answer

A)   It is the leading cause of nontraumatic blindness in humans.
B)   It is most often a disease of adults who suffer from sexually transmitted chlamydia.
C)   It leads to corneal scarring.
D)   It first infects the conjunctiva and kills cells there.
E)   Infants may contract the disease while passing through an infected birth canal.

Question 20

A patient was admitted to the emergency department suffering from severe diarrhea that had lasted a couple of days.There had already been significant weight loss.On examination,his stool was very watery with white bits of mucus and little odor.What pathogen is likely causing this condition,and how does it cause disease?

Accepted Answer

The patient is suffering from cholera,an...

Exam 21: Rickettsias, Chlamydias, Spirochetes, and Vibrios

Rickettsia prowazekii is transmitted by

Correct Answer
verified

People living in the northeastern United States are more at risk for exposure to which of the following rickettsias?

Correct Answer
verified

Louse-borne relapsing fever is caused by a spirochete known as Borrelia (burgdorferi/recurrentis/interrogans),which is capable of frequently changing its antigenic surface components.

Correct Answer
verified

Correct Answer
verified
The patient is suffering from cholera,an...
View Answer

An expanding rash that resembles a bull's-eye is a characteristic of secondary syphilis.

Correct Answer
verified

The pattern of fever shown in Figure 21.1 is most commonly seen with

Correct Answer
verified

Compare and contrast the pathogenesis of the sexually transmitted diseases chlamydia and syphilis.

Correct Answer
verified
Chlamydia is caused by the intracellular...
View Answer

Which of the following diseases is considered an emerging disease because it was unknown before 1987?

Correct Answer
verified

The characteristic lesion for tertiary syphilis is the presence of (gummas/necrosis/granulomas)in bones,in nervous tissue,or on the skin.

Correct Answer
verified

Helicobacter pylori produces (cytotoxin/hyaluronidase/urease),a unique virulence factor important to colonizing the digestive system.

Correct Answer
verified

Which of the following statements regarding trachoma is FALSE?

Correct Answer
verified

The endosomes of cells infected with chlamydia are filled up with the form known as

Correct Answer
verified

Chlamydia trachomatis produces a dormant,resistant stage for transmission from one host to another.

Correct Answer
verified

The intracellular parasite ________ infects cells of the conjunctiva and mucous membranes throughout the body.

Correct Answer
verified

Which of the following microorganisms have been referred to as energy parasites?

Correct Answer
verified

The zoonosis known as RMSF is the result of infection with Rickettsia (prowazekii/rickettsii/typhi).

Correct Answer
verified

Transovarian transmission is a process in which

Correct Answer
verified

Which of the following is the correct pairing of rickettsial pathogen and vector?

Correct Answer
verified

The (body louse/cat flea/dog tick)is the primary vector of epidemic typhus.

Correct Answer
verified

Which of the following causes pinta,a skin disease primarily of children,in which spirochetes are detectable in specimens from the lesions?

Correct Answer
verified

Exam 21: Rickettsias, Chlamydias, Spirochetes, and Vibrios

Rickettsia prowazekii is transmitted by

Correct AnswerverifiedShow Answer

People living in the northeastern United States are more at risk for exposure to which of the following rickettsias?

Correct AnswerverifiedShow Answer

Louse-borne relapsing fever is caused by a spirochete known as Borrelia (burgdorferi/recurrentis/interrogans),which is capable of frequently changing its antigenic surface components.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedThe patient is suffering from cholera,an...View AnswerShow Answer

An expanding rash that resembles a bull's-eye is a characteristic of secondary syphilis.

Correct AnswerverifiedShow Answer

The pattern of fever shown in Figure 21.1 is most commonly seen with

Correct AnswerverifiedShow Answer

Compare and contrast the pathogenesis of the sexually transmitted diseases chlamydia and syphilis.

Correct AnswerverifiedChlamydia is caused by the intracellular...View AnswerShow Answer

Which of the following diseases is considered an emerging disease because it was unknown before 1987?

Correct AnswerverifiedShow Answer

The characteristic lesion for tertiary syphilis is the presence of (gummas/necrosis/granulomas)in bones,in nervous tissue,or on the skin.

Correct AnswerverifiedShow Answer

Helicobacter pylori produces (cytotoxin/hyaluronidase/urease),a unique virulence factor important to colonizing the digestive system.

Correct AnswerverifiedShow Answer

Which of the following statements regarding trachoma is FALSE?

Correct AnswerverifiedShow Answer

The endosomes of cells infected with chlamydia are filled up with the form known as

Correct AnswerverifiedShow Answer

Chlamydia trachomatis produces a dormant,resistant stage for transmission from one host to another.

Correct AnswerverifiedShow Answer

The intracellular parasite ________ infects cells of the conjunctiva and mucous membranes throughout the body.

Correct AnswerverifiedShow Answer

Which of the following microorganisms have been referred to as energy parasites?

Correct AnswerverifiedShow Answer

The zoonosis known as RMSF is the result of infection with Rickettsia (prowazekii/rickettsii/typhi).

Correct AnswerverifiedShow Answer

Transovarian transmission is a process in which

Correct AnswerverifiedShow Answer

Which of the following is the correct pairing of rickettsial pathogen and vector?

Correct AnswerverifiedShow Answer

The (body louse/cat flea/dog tick)is the primary vector of epidemic typhus.

Correct AnswerverifiedShow Answer

Which of the following causes pinta,a skin disease primarily of children,in which spirochetes are detectable in specimens from the lesions?

Correct AnswerverifiedShow Answer

Correct Answer
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The patient is suffering from cholera,an...
View Answer

Correct Answer
verified

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verified
Chlamydia is caused by the intracellular...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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