Test Overview
Test Methodology

Immunodiffusion and Complement Fixation (Mycelial and Yeast)

Test Usage

Establish presence of antibody to Histoplasma.

Reference Range *

Negative

Test Limitations

A recent skin test with histoplasma antigen gives a misleading rise in CF titer as well as an M precipitin band in approximately 17% of patients having previous exposure to Histoplasma capsulatum. Cross-reacting antibodies sometimes present interpretive problems in patients having blastomycosis or coccidiodomycosis.

Test Details
Days Set Up
Monday - Friday
Analytic Time

2 - 6 days

Soft Order Code
HPAS
Synonyms
  • Histoplasma Mycelial and Yeast
  • HISOPLASMA IMMUNODIFFUSION
  • FIDHX
  • Fungal Antibody, Histoplasma
Laboratory
Sendout
Reference Laboratory
Mayo SHSTO
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect specimen in a red top or SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate. CSF is also acceptable.

Yellow Top Tube
Normal Volume
0.5 mL serum or 1.0 mL CSF
Minimum Volume
0.5 mL serum or 0.5 mL CSF
Additional Information

Test sent to Mayo Medical Laboratories.

Billing
CPT Code
86698 x3
Fee Code
AA012 x3
NY State Approved
No