What does the Sterigmatocystin, Urine test measure?

Why is Sterigmatocystin, Urine measured?

Urinary sterigmatocystin is a specific biomarker of Aspergillus versicolor exposure — a mould particularly prevalent in water-damaged buildings, insulation, and damp cellulosic materials. Its detection in functional medicine mycotoxin assessments specifically suggests water-damaged building exposure rather than dietary exposure, making it one of the more environmentally specific mycotoxins in the panel alongside the macrocyclic trichothecenes from Stachybotrys. Elevated urinary sterigmatocystin warrants environmental assessment of the patient's home or workplace for Aspergillus versicolor mould contamination, and is interpreted alongside other building-associated mycotoxins (gliotoxin, macrocyclic trichothecenes) to characterise the nature of mould exposure.

Reference ranges

Standard reference

# REVIEWER FLAG: Confirm Mosaic Diagnostics reference range for urinary sterigmatocystin — an IARC Group 2B possible human carcinogen and structural precursor to aflatoxin B1.

Functional medicine optimal

# REVIEWER FLAG: Confirm Mosaic Diagnostics' interpretive zones for urinary sterigmatocystin.

Units

ppb (µg/L), ng/g creatinine

Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.