A Complement Fixation Test Is Done to See If a Specimen

question 38

Multiple Choice

A complement fixation test is done to see if a specimen contains antibodies to rubella virus. A control negative for antibodies and a control positive for antibodies are run, and the sensitized sheep cells are tested alone with no specimen or complement added. Which of reactions below is correct if the specimen does contain antibodies?

• A)Positive control, no lysis; negative control, lysis; specimen, no lysis; red cells no lysis
• B)Positive control, lysis; negative control, no lysis; specimen, lysis; red cells lysis
• C)Positive control, lysis; negative control, no lysis; specimen, lysis; red cells no lysis
• D)Positive control, no lysis; negative control, lysis; specimen, no lysis; red cells lysis

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