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Test ID PARAV Parainfluenza Virus (Types 1, 2, 3) Antibodies, Serum

Method Name

Complement Fixation (CF)

Reporting Name

Parainfluenza (Types 1, 2, 3) Ab, S

Specimen Type

Serum

Draw blood in a plain, red-top tube(s). Spin down and send 1 mL of serum refrigerated.

 

Note: Serum gel tube is acceptable, but must pour off into a plastic vial.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Ambient (preferred) 7 days
  Frozen  30 days
  Refrigerated  14 days

Reference Values

REFERENCE RANGE: < 1:8

 

INTERPRETIVE CRITERIA:

< 1:8 Antibody Not Detected

≥1:8 Antibody Detected

 

Single titers ≥ 1:64 are indicative of recent infection. Titers of 1:8 to 1:32 may be indicative of either past or recent infection, since CF antibody levels persist for only a few months.  A four-fold or greater increase in titer between acute and convalescent specimens confirms the diagnosis. After initial infection, antibody responses at a later date are often heterotypic and exhibit crossreactivity with other paramyxoviruses (e.g., mumps).

Day(s) Performed

Monday through Friday

Report Available

2 - 5 days

Performing Laboratory

Focus Diagnositics, Inc.

Test Classification

This test was developed and its performance characteristics have been determined by Focus Diagnostics. Performance characteristics refer to the analytical performance of the test.

CPT Code Information

86790 x 3

NY State Approved

Yes