Microbe of the month: Basidiomycota

Classification: Funghi

Cultured from / Found in: HVAC Coils and Filters

Associated Health Risks: Type III hypersensitivity pneumonitis, Cryptococcal Meningitis, Allergic Alveolitis.


About the Funghi

Basidiospores develop into many sorts of commonly found mould. These moulds are identifiable by their MVOC (Microbial Volatile Organic Compounds) releases that have a unique musty and condensed smell. As small as 100-120 picometers in diameter, these allergens are present in a wide array of colours, shapes and sizes. The moulds themselves are composed of rarely clustered hyphae with clamp connections and distinctive asymmetrical attachment points.


Health Risks

Cryptococcal meningitis – an infection and inflammation of the meninges, which are the membranes that cover the brain and spinal cord. More common in people who have compromised immune systems.

Type III hypersensitivity pneumonitis – inhaled antigens produce a hypersensitivity immune reaction, inflammation of the alveoli and bronchioles within the lung and may lead to interstitial lung disease.

In your lungs, the main airways (bronchi) branch off into smaller and smaller passageways — the smallest, called bronchioles, lead to tiny air sacs (alveoli). Alveoli are balloon-shaped air sacs in your lungs. The function of the alveoli is to move oxygen and carbon dioxide (CO2) molecules into and out of your bloodstream. Alveoli are an important part of your respiratory system, which includes the parts of your body that help you breathe.

Allergic alveolitis – lung inflammation as an allergic reaction resulting from mould exposure.


Safe indoor air from a serviced HVAC system means a lower particle count and less breathing difficulties for occupants of the building. Clean-Air are IICRC mould remediation experts with the knowledge and experience to test, treat and eliminate serious mould-related risks within your HVAC system. If you have concerns about the air you are breathing, or would like an HVAC health check, contact our team today.