40 Questions
What is the most accurate laboratory diagnosis for trachoma?
Nucleic acid amplification tests (NAATs)
What is the main mode of transmission for trachoma?
Contact with contaminated flies
Which serotypes of Chlamydia trachomatis are responsible for inclusion conjunctivitis?
Serotypes D-K
What is the recommended systemic treatment for neonatal conjunctivitis caused by Chlamydia trachomatis?
Erythromycin
Which Chlamydia species is a zoonotic disease transmitted by inhalation of dust contaminated with respiratory secretions or feces of infected birds?
Chlamydia psittaci
Which diagnostic test is most commonly used for Q fever?
Detection of immunoglobulins to phase II antigens
What is the treatment for chronic Q fever?
Combination of doxycycline and hydroxychloroquine
Which type of epithelial cells can Chlamydia trachomatis infect?
Nonciliated columnar, cuboidal, and transitional epithelial cells
What is the primary lesion in lymphogranuloma venereum?
Ulcerating papule at the site of inoculation
Which antibiotic is typically prescribed for C. trachomatis infections?
Azithromycin
Which phase of illness does Weil disease represent in Leptospira infection?
Second phase
What is the most common reservoir for Rickettsia rickettsii?
Ticks
Which diagnostic method is recommended for suspected Rickettsia rickettsii infection regardless of age or pregnancy?
Western blot immunoassay
What structural variant of Coxiella burnetii is resistant to environmental stress and lives in soil and milk?
Small cell variant
What is the most common presentation of chronic C. burnetii infection?
Subacute endocarditis
What is the most common cause of bacterial gastroenteritis?
Consumption of contaminated food, milk, water
At what temperature does Campylobacter jejuni grow best?
42°C
What type of cells can Chlamydia trachomatis infect?
Epithelial cells
What is the characteristic histologic damage produced by Campylobacter jejuni?
Ulcerated, edematous, and bloody mucosal surfaces
What is the primary reservoir for Campylobacter jejuni infections?
Animals
What is the most common clinical presentation of Helicobacter pylori infection?
Feeling full, nausea, vomiting, and decreased acid production in the stomach
What is the primary mode of transmission for Treponema pallidum?
Sexual contact
Which factor contributes to the difficulty in microscopy diagnosis of Campylobacter jejuni?
Highly motile corkscrew motility
What is the recommended treatment for Helicobacter pylori infection?
Combination of PPI, a macrolide, and a β-lactam
Which clinical disease is characterized by the appearance of a painless chancre at the site of infection?
Primary syphilis
Which of the following is NOT a characteristic of Leptospira?
Obligate aerobes
What is the primary mode of transmission for Rickettsia rickettsii?
Transovarian transmission in ticks
Which statement about Q fever caused by Coxiella burnetii is true?
The bacteria reach high concentrations in the placenta of infected livestock
What is the hallmark clinical manifestation of Rocky Mountain Spotted Fever (RMSF) caused by Rickettsia rickettsii?
Macular rash after approximately 3 days
Which of the following is NOT a common method for diagnosing Leptospira infection?
Microscopy
What is the primary cause of trachoma worldwide?
Serotypes A, B, Ba, and C
Which diagnostic test is most accurate for the laboratory diagnosis of trachoma?
Nucleic acid amplification tests (NAATs)
What is the recommended systemic treatment for neonatal conjunctivitis caused by Chlamydia trachomatis?
Erythromycin
Which Chlamydia serotypes can infect the urogenital tract as well as the conjunctiva?
Serotypes D-K
What is the primary mode of transmission for trachoma?
Contact transmission
Which test can be used to examine exudate from the primary chancre of syphilis patients?
Dark-field microscopy
What is the protein critical for the transmission of Borrelia burgdorferi from ticks to mammals?
Outer surface protein A (OspA)
Which test is NOT recommended for the diagnosis of B. burgdorferi infection?
Microscopy
What characteristic hook is seen at one or both ends of Leptospira spp.?
Spirochete
Which antibiotic is contraindicated for pregnant people and children in the treatment of B. recurrentis infection?
Doxycycline
Test your knowledge on the pathogenesis and epidemiology of Leptospirosis, a zoonotic infection caused by Leptospira bacteria. This quiz covers the structure of Leptospira bacteria, its transmission, hosts, and worldwide distribution.
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