Recent interest has focused on developing PCR-based tests with single, multiplex, and real-time readings. These tests have sensitivity better than that of cultures. Nested PCR and RT-PCR are the most sensitive methods. They increase the detection rate of respiratory viruses in adults with hematologic cancers and pneumonia from 19% to 35%.
For more on workup in viral pneumonia, read here.
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Cite this: Michael Stuart Bronze. Fast Five Quiz: How Much Do You Know About Pneumonia? - Medscape - Feb 16, 2016.