Question 1

All of the following are urogenital infections in men, produced by Chlamydia trachomatis, except

Accepted Answer

A)  epididymitis. 
B)  orchitis. 
C)  prostatitis. 
D)  nongonococcal urethritis (NGU). 
A)  epididymitis. 
B)  orchitis. 
C)  prostatitis. 
D)  nongonococcal urethritis (NGU). B

Question 2

A young man goes to his physician complaining of a discharge from his penis. The physician collects a slide for Gram stain and a swab for culture and sends them to the laboratory. The Gram stain reveals greater than 25 white blood cells/high-power field, no bacteria seen. The culture results after 48 hours show no growth. What is the most probable diagnosis and the organism responsible?

Accepted Answer

A)  Urethritis, Streptococcus pneumoniae 
B)  Epididymitis, Moraxella 
C)  Nongonococcal urethritis, Neisseria meningitidis 
D)  Nongonococcal urethritis, Chlamydia trachomatis 
A)  Urethritis, Streptococcus pneumoniae 
B)  Epididymitis, Moraxella 
C)  Nongonococcal urethritis, Neisseria meningitidis 
D)  Nongonococcal urethritis, Chlamydia trachomatis D

Question 3

What testing method is the method of choice for detecting antibodies to Chlamydophila pneumoniae?

Accepted Answer

A)  DFA 
B)  Microimmunofluorescence 
C)  Complement fixation 
D)  Latex agglutination 
A)  DFA 
B)  Microimmunofluorescence 
C)  Complement fixation 
D)  Latex agglutination B

Question 4

Infants can contract all the following chlamydial infections when passing through the birth canal, except

Accepted Answer

A)  conjunctivitis. 
B)  nasopharyngeal infections. 
C)  pneumonia. 
D)  endocarditis. 
A)  conjunctivitis. 
B)  nasopharyngeal infections. 
C)  pneumonia. 
D)  endocarditis.

Question 5

All of the following diseases are associated with Chlamydia trachomatis, except

Accepted Answer

A)  undulant fever. 
B)  urethritis. 
C)  conjunctivitis. 
D)  LGV. 
A)  undulant fever. 
B)  urethritis. 
C)  conjunctivitis. 
D)  LGV.

Question 6

An invasive genital disease associated with buboes in the groin describes an infection caused by

Accepted Answer

A)  Rickettsia conorii. 
B)  Rickettsia rickettsii. 
C)  Chlamydophila psittaci. 
D)  Chlamydia trachomatis. 
A)  Rickettsia conorii. 
B)  Rickettsia rickettsii. 
C)  Chlamydophila psittaci. 
D)  Chlamydia trachomatis.

Question 7

What is the name of the test used to detect rickettsial agents?

Accepted Answer

A)  Levy-Jennings 
B)  Mueller-Hinton 
C)  Weil-Felix 
D)  Watson-Crick 
A)  Levy-Jennings 
B)  Mueller-Hinton 
C)  Weil-Felix 
D)  Watson-Crick

Question 8

What organism causes endemic typhus?

Accepted Answer

A)  Rickettsia typhi 
B)  R. canada 
C)  R. rickettsii 
D)  R. prowazekii 
A)  Rickettsia typhi 
B)  R. canada 
C)  R. rickettsii 
D)  R. prowazekii

Question 9

What disease, caused by Chlamydia trachomatis, is considered a sexually transmitted disease where the organisms enter the lymph nodes near the genital tract, resulting in bubo formation and ultimately rupturing the lymph node?

Accepted Answer

A)  LGV 
B)  Trachoma 
C)  Pelvic inflammatory disease (PI
D)  
D)  Conjunctivitis 
A)  LGV 
B)  Trachoma 
C)  Pelvic inflammatory disease (PI
D)  
D)  Conjunctivitis

Question 10

Chlamydia trachomatis is the infectious agent in all the following conditions in humans, except

Accepted Answer

A)  trachoma. 
B)  urogenital infections. 
C)  lymphogranuloma venereum (LGV). 
D)  pharyngitis. 
A)  trachoma. 
B)  urogenital infections. 
C)  lymphogranuloma venereum (LGV). 
D)  pharyngitis.

Question 11

Fifty years after his release from a concentration camp, a man develops signs and symptoms of typhus. He currently has no known contacts or source of disease exposure; however, he may have had it in 1945 when he experienced similar symptoms. What is the most likely current diagnosis?

Accepted Answer

A)  Oroya fever 
B)  Q fever 
C)  Rocky Mountain spotted fever 
D)  Brill-Zinsser syndrome 
A)  Oroya fever 
B)  Q fever 
C)  Rocky Mountain spotted fever 
D)  Brill-Zinsser syndrome

Question 12

Why are antibody detection methods for Chlamydia trachomatis infection severely limited in the knowledge they provide the physician?

Accepted Answer

A)  Because C. trachomatis is an intracellular parasite, the body does not produce antibodies against it. 
B)  Only IgE antibodies are produced against C. trachomatis. 
C)  Many people have antibodies from previous infections, and local infections do not cause great increases in antibody levels. 
D)  All of the above. 
A)  Because C. trachomatis is an intracellular parasite, the body does not produce antibodies against it. 
B)  Only IgE antibodies are produced against C. trachomatis. 
C)  Many people have antibodies from previous infections, and local infections do not cause great increases in antibody levels. 
D)  All of the above.

Question 13

What is the preferred technique to rapidly detect Chlamydia trachomatis in clinical specimens?

Accepted Answer

A)  Enzyme immunoassay (EI
A)  
B)  Nucleic acid amplification test (NAAT) 
C)  Cell culture 
D)  Cytologic methods 
A)  Enzyme immunoassay (EI
A)  
B)  Nucleic acid amplification test (NAAT) 
C)  Cell culture 
D)  Cytologic methods

Question 14

What organism's unique life cycle contains an elementary body (EB) and a reticulate body (RB)?

Accepted Answer

A)  Haemophilus 
B)  Chlamydia 
C)  Ureaplasma 
D)  Mycoplasma 
A)  Haemophilus 
B)  Chlamydia 
C)  Ureaplasma 
D)  Mycoplasma

Question 15

What organism causes epidemic louseborne typhus?

Accepted Answer

A)  Rickettsia typhi 
B)  R. canada 
C)  R. rickettsii 
D)  R. prowazekii 
A)  Rickettsia typhi 
B)  R. canada 
C)  R. rickettsii 
D)  R. prowazekii

Question 16

Diseases caused by rickettsial organisms are typically transmitted to humans by

Accepted Answer

A)  ingestion of contaminated food. 
B)  an arthropod vector. 
C)  animal bites. 
D)  inhalation of aerosols. 
A)  ingestion of contaminated food. 
B)  an arthropod vector. 
C)  animal bites. 
D)  inhalation of aerosols.

Question 17

What has an outer membrane similar to that of many gram-negative bacteria, with the most prominent feature being the major outer membrane protein?

Accepted Answer

A)  Haemophilus 
B)  RB 
C)  EB 
D)  Intracellular parasites 
A)  Haemophilus 
B)  RB 
C)  EB 
D)  Intracellular parasites

Question 18

Chlamydia trachomatis produces all the following conditions in adult women, except

Accepted Answer

A)  PID 
B)  salpingitis 
C)  bacterial vaginosis 
D)  endometritis 
A)  PID 
B)  salpingitis 
C)  bacterial vaginosis 
D)  endometritis

Question 19

What disease does Chlamydophila psittaci cause in humans?

Accepted Answer

A)  Conjunctivitis 
B)  Endocarditis 
C)  Parrot fever 
D)  Bird flu 
A)  Conjunctivitis 
B)  Endocarditis 
C)  Parrot fever 
D)  Bird flu

Question 20

What organism causes Rocky Mountain spotted fever?

Accepted Answer

A)  Rickettsia prowazekii 
B)  R. typhi 
C)  R. canada 
D)  R. rickettsii 
A)  Rickettsia prowazekii 
B)  R. typhi 
C)  R. canada 
D)  R. rickettsii

Exam 24: Chlamydia, Rickettsia, and Similar Organisms

All of the following are urogenital infections in men, produced by Chlamydia trachomatis, except

What testing method is the method of choice for detecting antibodies to Chlamydophila pneumoniae?

Infants can contract all the following chlamydial infections when passing through the birth canal, except

All of the following diseases are associated with Chlamydia trachomatis, except

An invasive genital disease associated with buboes in the groin describes an infection caused by

What is the name of the test used to detect rickettsial agents?

What organism causes endemic typhus?

What disease, caused by Chlamydia trachomatis, is considered a sexually transmitted disease where the organisms enter the lymph nodes near the genital tract, resulting in bubo formation and ultimately rupturing the lymph node?

Chlamydia trachomatis is the infectious agent in all the following conditions in humans, except

Fifty years after his release from a concentration camp, a man develops signs and symptoms of typhus. He currently has no known contacts or source of disease exposure; however, he may have had it in 1945 when he experienced similar symptoms. What is the most likely current diagnosis?

Why are antibody detection methods for Chlamydia trachomatis infection severely limited in the knowledge they provide the physician?

What is the preferred technique to rapidly detect Chlamydia trachomatis in clinical specimens?

What organism's unique life cycle contains an elementary body (EB) and a reticulate body (RB)?

What organism causes epidemic louseborne typhus?

Diseases caused by rickettsial organisms are typically transmitted to humans by

What has an outer membrane similar to that of many gram-negative bacteria, with the most prominent feature being the major outer membrane protein?

Chlamydia trachomatis produces all the following conditions in adult women, except

What disease does Chlamydophila psittaci cause in humans?

What organism causes Rocky Mountain spotted fever?

Bacterial Cell Structure, Physiology, Metabolism, and Genetics

Hostparasite Interaction

The Laboratory Role in Infection Control

Control of Microorganisms

Performance Improvement in the Microbiology Laboratory

Specimen Collection and Processing

Microscopic Examination of Materials From Infected Sites

Use of Colony Morphology for the Presumptive Identification of Microorganisms

Biochemical Identification of Gram-Negative Bacteria

Immunodiagnosis of Infectious Diseases

Applications of Molecular Diagnostics

Antimicrobial Agent Mechanisms of Action and Resistance Mechanisms

Antimicrobial Susceptibility Testing

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Streptococcus, Enterococcus, and Other Catalase-Negative, Gram-Positive Cocci

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Enterobacteriaceae

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Anaerobes of Clinical Importance

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Medically Significant Fungi

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Agents of Bioterror and Forensic Microbiology

Biofilms: Architects of Disease

Upper and Lower Respiratory Tract Infections

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Urinary Tract Infections

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