A direct immunofluorescent antibody (DFA) test was performed on a sputum sample that yielded a positive test. The organism grew on BCYE medium and was a thin gram-negative, faintly staining bacillus. What is the drug of choice for this organism?
a. Fluoroquinolones
b. Erythromycin
c. Penicillin
d. Aminoglycosides
A
Because newer agents such as fluoroquinolones and the newer macrolides (e.g., clarithromycin, azithromycin) are more active against Legionella pneumophila, erythromycin has been replaced. Alternative regimens include doxycycline and the combination of erythromycin and rifampin. Clinical response usually follows within 48 hours after the introduction of effective therapy. Pe-nicillins, cephalosporins of all generations, and aminoglycosides are not effective and should not be used.
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The cell wall of bacteria constrains the ________ that results from the osmolarity of the cytoplasmic contents.
Fill in the blank(s) with the appropriate word(s).
The parietal lobe is indicated by
a. A. b. B. c. C. d. D. e. E.
Which one of the following is a function of a protein?
A) stores genetic material and enables its transmission to the next generation B) acts as a catalyst, speeding up chemical reactions C) is a major subunit of cellulose D) is a primary structural component of a cell membrane E) provides energy for a muscle contraction
Strictly speaking, mitosis and meiosis are divisions of the
A) cytoplasm. B) nucleus. C) nucleus and chromosomes. D) chromosomes. E) nucleus, cytoplasm, and chromosomes.