The most common etiologic agent of community-acquired pneumonia in adults older than 30 years of age is ___ pneumoniae

a. Mycoplasma
b. Chlamydophila
c. Streptococcus
d. Klebsiella


C
The most common etiologic agent of lower respiratory tract infection among adults younger than 30 years of age is M. pneumoniae, which is transmitted via close contact. Regardless of age or coexisting illness, S. pneumoniae is most prevalent, causing 15% to 80% of all communi-ty-acquired bacterial pneumonia.

Biology & Microbiology

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During in vitro fertilization, the fertilized egg ____

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If a pedigree of several generations shows only females affected by a particular trait, what can be ruled

out? A. Autosomal recessive inheritance D. X-linked recessive inheritance B. X-linked dominant inheritance E. None of these can be ruled out C. Y-linked inheritance

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Which group of protists are unicellular, biflagellate stramenopiles that forms a significant portion of the

nanoplankton? a. ciliates b. red algae c. golden algae d. foraminifera e. brown algae

Biology & Microbiology

In areas that have a stable population, the number of children born in a period of time is

A) decreasing. B) lower than the number of adults. C) higher than the number of adults. D) increasing. E) approximately equal to the number of adults.

Biology & Microbiology