超星 - 四体--章节练习

单选题

The following statements about trachoma are correct except

A. Trachoma is readily prevented by a chlamydial vaccine
B. It follows chronic or recurrent eye infection with Chlamydia trachomatis.
C. Millions of people worldwide have trachoma.
D. Progression of trachoma can be slowed by intermittent treatment with azithromycin
E. Trachoma involves scarring of the conjunctiva, eyelid deformities, and eyelash injury to the cornea.

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单选题

A 28-year-old woman who is 10 weeks pregnant presents to the obstetrics clinic for prenatal care. She has a history of treatment for syphilis 7 years previously. The results of serologic tests for syphilis are as follows: nontreponemal test, RPR, nonreactive; treponemal test (TP-PA), reactive. Which of the following statements is most correct?

A. The baby is at high risk for congenital syphilis
B. The mother’s previous treatment for syphilis was effective.
C. The mother needs to be treated again for syphilis
D. The mother needs a lumbar puncture and a VDRL test of her CSF for neurosyphilis

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单选题

The soil is the natural habitat for certain microorganisms of medical importance. Which one of the following is LEAST likely to reside there?

A. Clostridium tetani
B. Chlamydia trachomatis
C. Mycobacterium intracellulare
D. Bacillus anthracis

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单选题

Each of the following statements concerning epidemic typhus is correct EXCEPT

A. The disease is charcterized by a rash
B. The Wail Felix test can aid in diagnosis of the disease
C. The disease is caused by a rickettsia
D. The causative organism is transmitted from rodents to humans by a tick

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单选题

Which one of the following bacteria containing the cross antigen of some rickettsiae

A. Proteus
B. E.coli
C. S.typhi
D. Shigella

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单选题

The vector of Rickettsia prowazekii is

A. human louse
B. flea
C. mosquito
D. tick

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单选题

Rickettsiae, which include the spotted fevers, typhus, and scrub typhus, are

A. Obligate intracellular parasites
B. Stable outside the host cell
C. Easily stained (Gram-negative) with a Gram stain
D. Maintained in nature with humans as the mammalian reservoir

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单选题

Chlamydiae have an unusual three-stage cycle of development. The correct sequence of these events is

A. Penetration of the host cell, synthesis of elementary body progeny, development of an initial body
B. Penetration of the host cell, development of an initial body, synthesis of elementary body progeny
C. Development of an initial body, synthesis of elementary body progeny, penetration of the host cell
D. Synthesis of elementary body progeny, development of an initial body, penetration of the host cell
E. Synthesis of elementary body progeny, penetration of the host cell, development of an initial body

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单选题

Chlamydiae trachomatis is a well-known cause of venereal disease. This organism is also implicated in which of the following?

A. Classic trachoma infection
B. Sexually transmitted cardiac disease in adults
C. Perinatal retinitis
D. Middle-ear infection in young children
E. Urinary tract infection in children

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单选题

Each of the following statements concerning Chlamydia trachomatis is correct EXCEPT

A. It is an important cause of nongonococcal urethritis
B. It is an important cause of conjunctivitis
C. It is the cause of lymphograauloma venereum
D. it is an important cause of subacute bacteriai endocarditis

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