A Latex Agglutination Test Is Done for Legionella Antigen

question 42

Multiple Choice

A latex agglutination test is done for Legionella antigen. Reactions were as follows:latex particles coated with murine anti-Legionella + specimen = 2+ agglutination
latex particles coated with murine anti-Legionella + positive control = 2+ agglutination
latex particles coated with murine anti-Legionella + negative control = no agglutination
latex particles coated with non-specific murine antibodies + specimen = 2+ agglutination
What is the best interpretation of this set of data?

• A)This specimen may have heterophile antibodies or other cross- reacting species and should be tested by another method.
• B)The specimen is negative for Legionella antigen.
• C)The assay must be repeated because the positive and negative controls appear to have been mixed up.
• D)The specimen is positive for Legionella antigen.

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Definitions:

Standard

A level of quality or attainment.

Unfavorable Direct Materials Price Variance

A financial metric indicating that the actual cost of direct materials was higher than the planned or standard cost, leading to a decrease in profitability.

Standard Price

Standard price is a pre-determined cost assigned to materials, labor, and overheads to measure variances in budgeting and accounting.

Direct Materials

Raw materials directly used in the production of goods, easily traceable to the final product.