Alternaria

Often found in materials cycling between 16-25% moisture content

Address ventilation and condensation before remediation for lasting results

Is Alternaria (Alternaria alternata) dangerous?

Alternaria is classified as a moderate-risk, allergenic mold with severe allergenic potential. Primary health concerns include major asthma trigger, potent allergen, hay fever symptoms, allergic rhinitis. Can cause opportunistic infections including cutaneous and subcutaneous infections in immunocompromised patients A professional assessment determines the extent and the right response for your property.

Where does Alternaria grow in Gulf Coast homes?

Alternaria commonly appears in shower stalls and bathtub surrounds, window frames and sills with condensation, under kitchen and bathroom sinks, hvac drip pans and drain lines. It thrives at 65-95% relative humidity with a water activity of 0.85-0.95 aw, conditions that are common across humid Louisiana and Mississippi Gulf Coast properties.

How do you identify Alternaria?

Fast-growing colonies with dense aerial mycelium; dark pigmentation develops with age Colonies are typically dark olive-green, dark brown, black with a velvety to woolly with hair-like surface structures texture. Earthy, soil-like odor with organic undertones Confirmation requires professional sampling and laboratory analysis rather than visual identification alone.

What does remediation of Alternaria involve?

Alternaria typically calls for standard containment. Remove heavily contaminated porous materials; light contamination may be addressed with HEPA vacuuming and encapsulation Address ventilation and condensation before remediation for lasting results InspectaMold documents the conditions and provides an independent protocol so the underlying moisture source is corrected, not just the visible growth.