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Lab Manual for Moffitt-Long and Mount Zion

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Influenza A virus antibody

Item Value
Approval req'd? No
Available Stat? No
Test code FLUA
Test group Influenza
Performed by Quest
Sendout? Yes
Method Complement fixation
Container type Gold top or Red top
Amount to Collect 2 mL blood
Sample type Serum
Preferred volume 1 mL serum
Min. Volume 0.5 mL serum
Processing notes Refrigerate serum. Order Quest #52290P
Units titer
Normal range Negative titer < 1:8
Synonyms flu A
Stability Room temperature 4 days, refrigerated 1 week, frozen at -20C 1 month
Turn around times Performed 5x per week. Turnaround 3-5 days
Additional information Influenza Type A and B viruses cause
seasonal outbreaks of "the flu". Each winter,
approximately 10-20% of the population are
infected. Both Type A and B are included in
the flu vaccine.

Single titers of ≥ 1:64 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.

See also entry for Viral Serology and Respiratory Virus DFA
CPT coding 8671-90
LOINC code 5229-0
Last Updated 10/2/2010 11:52:10 AM
Entry Number 569
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