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Beaumont Laboratory

Toxocara Antibody, IgG

Visceral Larva Migrans Antibody, Larva Migrans Antibody, ARUP #99090, EPIC: LAB6164, SOFT: XTOXA


Acute and convalescent specimens must be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days of the acute specimens. Please mark specimen plainly as "acute" or "convalescent."

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Physician Office/Drawsite Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 1.0 mL serum, refrigerated (2-8°C or 36-46°F). (Min: 0.15 mL)

Rejection Criteria

  • Specimens not collected and processed as indicated.


Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 48 hours
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 1 year

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.


Sent to ARUP Laboratories, Salt Lake City, UT.


Tuesday, Friday.
Results available within 2-6 days.

Reference Range

Negative: Less than 0.300 OD - No significant level of Toxocara IgG antibody detected.
Equivocal: 0.300-0.500 OD - Questionable presence of Toxocara IgG antibody detected. Repeat testing in 10-14 days may be helpful.
Positive: Greater than 0.501 OD - Presence of IgG antibody to Toxocara detected, suggestive of current or past infection.

Test Methodology

Semi-Quantitative Enzyme-Linked Immunosorbent Assay.

Clinical Utility

This assay aids in the serological diagnosis of toxocariasis. It screens serum for antibodies against Toxocara canis. Toxocara canis is a nonhuman ascarid nematode that undergoes limited development in humans. T. canis causes visceral larva migrans in humans. The larval form of T. canis occurs in human tissues (liver, eye, and central nervous system). Infection is acquired by ingesting eggs which are excreted in the feces of dogs or cats that are infected with adult worms.

CPT Code


Test Codes


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This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.