Rhizopus Nigricans IgE Test in Idaho

What this test measures

Molds release tiny spores that travel through the air and can be inhaled. Rhizopus nigricans is a common mold species associated with damp organic matter, including compost, spoiled food, and moist indoor surfaces. For a sensitized person, inhaling these spores can trigger sneezing, congestion, itchy eyes, or asthma-like symptoms, and the test measures the IgE antibodies involved in that response.

Only a blood sample is required, so there is no skin testing or deliberate exposure to mold. Results are typically reported as a quantitative antibody concentration in kilounits per liter with a graded class. Because people are often exposed to several molds at once, the test may be ordered as part of a broader mold or inhalant panel that includes Alternaria, Cladosporium, Aspergillus, and Penicillium.

People who notice symptoms in damp buildings, basements, greenhouses, or agricultural settings may consider this test. It can also add detail when a general mold panel is positive but the specific mold responsible is unclear. A qualified healthcare provider interprets the finding alongside the person's environment and symptom history.