To detect antibodies in human serum, the direct EIA is most commonly employed. (True or false?)

To detect antibodies in human serum, the direct EIA is most commonly employed.
 
  Indicate whether the statement is true or false.

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Fluorescent antibodies can be used to separate mixtures of cells into relatively pure populations with a fluorescence cytometer.
 
  Indicate whether the statement is true or false.

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Nucleic acid probes and immunological reagents are NOT commonly used in the clinical laboratory for the diagnosis of viral disease, because the cultivation of the virus is often difficult or even impossible.
 
  Indicate whether the statement is true or false.

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Some infectious agents, such as Neisseria gonorrhoeae, do NOT elicit a systemic immune response.
 
  Indicate whether the statement is true or false.

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At this time, EIA tests are too difficult for routine diagnoses.
 
  Indicate whether the statement is true or false.