The primary drug of choice for infections caused by S. maltophilia is:
a. a <-lactam agent in combination with an aminoglycoside antibiotic.
b. trimethoprim-sulfamethoxazole.
c. ticarcillin and clavulanic acid.
d. chloramphenicol.
B
S. maltophilia is notoriously resistant to most currently available antimicrobial agents, leaving trimethoprim-sulfamethoxazole as the primary drug of choice for infections caused by this spe-cies. Although a few other agents, such as minocycline, ticarcillin and clavulanic acid, and chlo-ramphenicol, often exhibit in vitro activity, clinical experience with these agents is not extensive. Therefore, trimethoprim-sulfamethoxazole remains the drug of choice.
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The approximate resolving power of the unaided human eye is:
A) 0.2 cm. B) 0.2 mm. C) 0.2 ?m. D) 0.2 nm.
The expression of ABC genes _____
a. occurs in layers b. controls flower formation c. causes mutations in flowers d. occurs in layers and control flower formation
Epithelia are often very thin sheets of tissue. What binds them to underlying tissues?
a. the fascia latae b. the basement lamina c. the ependymal layer d. the goblet cells e. the ligamentum nuchae
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