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Problem 20.3a
Why do nurses place antimicrobial agents in babies’ eyes at birth?
Problem 20.4a
Statistics show that meningococcal diseases are more frequent in college dormitories and military barracks than in the population at large. Suggest an explanation of this observation.
Problem 20.5a
Why might an alcoholic be susceptible to pulmonary disease?
Problem 20.6a
Name six factors that facilitate the production of disease by Bordetella pertussis.
Problem 20.7a
Which of the following bacteria might be responsible for the formation of petechiae in a host?
a. Neisseria meningitidis
b. Escherichia coli O157:H7
c. Klebsiella
d. Proteus mirabilis
Problem 20.7a
Given that pseudomonads are present in almost every moist environment, why do they cause less disease than other, less prevalent Gram-negative bacteria?
Problem 20.8a
The pathogen Haemophilus influenzae b causes.
a. meningitis in children
b. upper respiratory flu
c. endocarditis
d. genital chancroid
Problem 20.8a
Although an effective vaccine is available to eradicate pertussis in the United States, why has the number of reported cases increased since the 1970s?
Problem 20.9a
Which of the following diseases is typically mild?
a. Brazilian purpuric fever
b. bartonellosis
c. pediatric meningitis
d. cat scratch disease
Problem 20.9a
What two illnesses can be caused by Legionella pneumophila?
Problem 21.1
Match the disease with the causative pathogen in the list.
___ Spotted fever rickettsiosis
___ Murine typhus
___ Epidemic typhus
___ Scrub typhus
___ Ehrlichiosis
A. Rickettsia typhi
B. Rickettsia prowazekii
C. Rickettsia rickettsii
D. Orientia tsutsugamushi
E. Ehrlichia chaffeensis
Problem 21.1a
Suggest a hypothesis to explain why rickettsias are obligate parasites.
Problem 21.10a
During which stage of syphilis is penicillin ineffective?
a. primary syphilis
b. secondary syphilis
c. tertiary syphilis
d. all of the above
Problem 21.1a
Label the following stages and structures of the chlamydia life cycle: elementary body, endocytosis, vesicle, host cell, inclusion body, reticulate body. For B–D, indicate how many hours have typically transpired since infection. <IMAGE>
Problem 21.11a
Two weeks after a backpacking trip in Tennessee, a hiker experienced flulike symptoms
and noticed a red rash on his thigh. What is the likely cause of his illness?
a. Treponema pallidum pertenue
b. Borrelia burgdorferi
c. Borrelia recurrentis
d. Leptospira interrogans
Problem 21.12a
The most common cause of bacterial gastroenteritis in the United States is
a. Vibrio parahaemolyticus
b. Campylobacter jejuni
c. Helicobacter pylori
d. Vibrio cholerae
Problem 21.13a
Historical journals have described gummas on patients. What disease most likely caused
these lesions?
a. ornithosis
b. syphilis
c. trachoma
d. pneumonia
Problem 21.2
Describe the three developmental stages of the bacteria Ehrlichia and Anaplasma.
Problem 21.2a
Label inclusion, elementary, and reticulate bodies of Chlamydia: <IMAGE>
Problem 21.4a
Describe the phases of untreated syphilis.
Problem 21.5a
The most commonly reported sexually transmitted disease in the United States is caused
by the bacterium
a. Mycoplasma genitalium
b. Chlamydia trachomatis
c. Chlamydophila proctitis
d. Ureaplasma urealyticum
Problem 21.5a
Discuss the prospects for the eradication of leptospirosis.
Problem 21.6
Beginning with the ingestion of water contaminated with V. cholerae O1 El Tor, describe the course of the disease it causes.
Problem 21.6a
Which of the following diseases would be least likely in rural areas of the United States?
a. epidemic typhus
b. Rocky Mountain spotted fever
c. murine typhus
d. lymphogranuloma venereum
Problem 21.7a
Treatment of chlamydial infections involves
a. erythromycin cream
b. doxycycline creams
c. surgical correction of eyelid deformities
d. all of the above
Problem 21.8a
Which of the following organisms is transmitted via sexual contact?
a. Treponema pallidum endemicum
b. Treponema pallidum pertenue
c. Treponema pallidum pallidum
d. Treponema carateum
Problem 21.9a
Which of the following is not true of cholera?
a. The causative agent lives naturally in marine water.
b. There is an effective vaccine for cholera.
c. Strain 01 El Tor has been responsible for several pandemics.
d. Rice-water stool is a symptom.
Problem 22
Indicate whether each statement is true or false. If the statement is false, change the underlined word or phrase to make the statement true.
_____ Candida albicans generally causes localized opportunistic infections but can become systemic, particularly in the immunocompetent.
Problem 22.c
Which pathogenic fungus is associated with bird droppings? _____ _____ (give genus and species).
Problem 22.10
Which of the following systemic mycoses is endemic to the deserts of the southwestern
United States?
a. Blastomycosis
b. Coccidioidomycosis
c. Histoplasmosis
d. Paracoccidioidomycosis