Advantages of the interferon-gamma release assay (IGRA) over the traditional TB skin test include all of the following except
A) IGRAs are sensitive enough to detect early cases of TB.
B) IGRA can provide results within a day.
C) IGRA requires only one patient visit as opposed to two with the skin test.
D) IGRA only detects active TB infections.
E) IGRA can be used on persons who have been vaccinated against TB.
Answer: D
You might also like to view...
Protein X contains four transmembrane domains, a short N-terminus and a long C-terminus. Following protein synthesis, the N-terminus of the protein faces the lumen (the inside) of the ER. After protein X is transported to the cell surface via exocytosis, you would expect the N-terminus of protein X to be
A. extracellular. B. cytoplasmic. C. in the lumen. D. in the lipid bilayer of the plasma membrane.
Birds that have long narrow bills used for eating bivalves and other invertebrates are:
a. gulls. b. pelicans. c. shore birds. d. tubenoses. e. skuas and jaegers.
If both parents are "carriers" due to the presence of one copy of the Tay-Sachs allele, what are the odds that they would have a normal child?
a. 0 b. 25% c. 50% d. 75% e. 100%
Which of the following describes a feature found in bacterial expression vectors but not in cloning vectors?
(a) origin of replication (b) cleavage sites for restriction nucleases (c) promoter DNA sequences (d) a polyadenylation signal