Question 1

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. 
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 2

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

Accepted Answer

A) True 
 B)False

Question 3

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

Question 4

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

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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

Question 7

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

Question 8

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 9

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. 
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 10

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 11

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

Question 12

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

Question 13

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. 
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 14

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

Accepted Answer

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

Question 15

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 16

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

Question 17

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

Question 18

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

Accepted Answer

Chlamydia is caused by the intracellular

Question 19

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 20

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...

Exam 21: Rickettsias, Chlamydias, Spirochetes, and Vibrios

Transovarian transmission is a process in which

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

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

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

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

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

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

Rickettsia prowazekii is transmitted by

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

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

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

Which of the following statements regarding trachoma is FALSE?

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

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.

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

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

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

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

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

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

Pathogenic Gram-Negative Cocci and Bacilli

Pathogenic Fungi

Parasitic Protozoa, Helminths, and Arthropod Vectors

Pathogenic DNA Viruses

Pathogenic RNA Viruses

Applied and Environmental Microbiology

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