There are many debates about mould in the home and effects on human health. On one occaision I was called to investigate the source of a mould odour and after an extensive survey I discovered a large black slimy growth . The Owner had been to the doctor for treatment to a skin condition and had been given steroids . We sent samples of the mould away for analysis and it was identified as Aspergillus fumigatus. This mould has a series of effects on humans including skin disorders and is more of a hazard to people with suppressed immune systems.The Owner of the property showed my report to his doctor for information only but the case was so strong that the doctor changed the medication . His house insurance agreed to fund the removal of the mould and rebuilt the shower. The owner had been suffering for 8 years not knowing what the problem was. Now he is much better. Aspergillus and similar moulds grow in very damp environments. For details about Aspergillus moulds and other moulds that can affect your health look at the NHS website http://www.nhs.uk/conditions/Aspergillosis/Pages/Introduction.aspx If you can smell strong mouldy odours around your showers ,kitchens, bathrooms etc then consider calling for an independent damp survey from Damp detectives. Mould,Condensation,and damp patches are all signs that moisture is being produced somewhere and this can lead to mould growth in your home.