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Test Code ATR Isoagglutinin Titer, Anti-A, Serum

Shipping Instructions

Specimen must arrive within 10 days of draw.

Specimen Required

Container/Tube: Red top

Submission Container/Tube: Serum Aliquot tube

Specimen Volume: 2.5 mL

Pediatric Volume: 2 mL

Useful For

Evaluation of individuals with possible hypogammaglobulinemia


Investigation of suspected roundworm infections

Method Name


Reporting Name

Isoagglutinin Titer, Anti-A

Specimen Type

Serum Red

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Ambient (preferred) 4 days
  Frozen  10 days
  Refrigerated  10 days

Reference Values

Interpretation depends on clinical setting. No defined reference values.

Day(s) and Time(s) Performed

Monday through Friday, Sunday; Continuously

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test uses a standard method. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
ATR Isoagglutinin Titer, Anti-A 38358-8


Result ID Test Result Name Result LOINC Value
ATR Isoagglutinin Titer, Anti-A 38358-8