A sample suspected of containing Legionella pneumophila is treated with the dye fluorescein isothiocyanate (FITC); however, the sample fluoresced a bright apple-green colony after it was processed. Which of the following statements explains this discrepancy?
a. A technical error may have occurred.
b. The fluorescent bulb may have malfunc-tioned.
c. The results are accurate; no discrepancy is found.
d. A postanalytical error is to blame.
C
Fluorescent antibody testing is available for L. pneumophila testing. FITC produces an ap-ple-green fluorescence when an organism tests positive.
You might also like to view...
Helicobacter pylori is responsible for ________.
A. peptic ulcer disease B. pneumonia C. cholera D. dysentery
Scientific thinking relies on which of the following?
A) accepting the statements of others as true B) intuition C) memorizing facts D) skepticism E) applying your preconceptions
Nitrifying Thaumarchaeota outcompete nitrifying bacteria in many aquatic and terrestrial environments because Thaumarchaeota
A) are well-adapted to high salinity and extreme UV irradiation. B) are well-adapted to temperature extremes. C) are well-adapted to very low nutrient and electron donor concentrations. D) have very resistant specialized cells that survive long periods of dehydration and nutrient starvation.
Some lichens can reach ages of at least:
A. 2 years B. 10 years C. 100 years D. 450 years E. 4,500 years