Select the best response to the question.
?A person infected with Giardia should be treated with which of the following?
A) antibiotics after the culture and sensitivity report is obtained
B) oxygen and inhaled medications
C) fluids, electrolytes, and antimicrobials such as metronidazole
D) no treatment is currently available
D
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What would be a primary advantage of using an attenuated agent rather than just an antigen from that agent for a vaccine?
A. This is actually a disadvantage-it's much more dangerous to use an attenuated agent over a subunit (single antigen) vaccine due to the possibility of reversion of the microbe to a pathogenic state. B. An attenuated agent strongly stimulates ONLY the antibody production (humoral response) of the adaptive immune system. This provides the best and strongest long-term protection. C. An attenuated agent strongly stimulates ONLY the cytotoxic T cell (CTL, cell-mediated) side of the adaptive immune system. This provides the best and strongest long-term protection. D. An attenuated agent strongly stimulates both the humoral (antibody) AND cell-mediated (T cell) portions of the adaptive immune response, giving the best comprehensive long-term protection available.
A eukaryotic cell
A. does not usually have a nucleus. B. does not have membrane-bounded organelles. C. has membrane-bounded organelles. D. is usually smaller than a prokaryotic cell. E. has a cell wall with peptidoglycan.
What process copies a sequence of DNA nucleotides into a complementary sequence of RNA nucleotides?
A) translation B) mutation C) transcription D) duplication
Some viral pathogens evade detection by the vertebrate immune system by a mechanism that most likely involves what process?
A. Becoming a symbiont B. Becoming metabolically inactive C. Becoming a spore D. Becoming nonvirulent E. Frequent changing of surface antigens