Moulds are microscopic fungi which spread over all kinds of surfaces such as paper, wood and leather.

They can also be found in damp, poorly ventilated rooms such as bathrooms, kitchens and basements.

They also grow on food such as bread, cheese, fruit and vegetables. They take the form of different coloured patches and it is the spores they release into the atmosphere when reproducing which are responsible for the allergy.

Stallergenes Greer UK