[Non allergic disorders associated with domestic moulds]. / Pathologie non allergique et exposition aux moisissures domestiques.

INTRODUCTION: Mouldy surfaces are encountered in up to 20 % of dwellings. Because this indoor air contamination is so widespread, respiratory physicians should be aware of its effects on health and especially of its impact on respiratory diseases. BACKGROUND: The air contaminants within mouldy dwellings are very diverse. Therefore, a given heath effect cannot be attributed specifically to an individual contaminant. In the field of respiratory diseases, excluding asthma and allergy, long-term exposure to indoor moulds has been recognized as a risk factor for both ENT and bronchial symptoms. Hydrophilic moulds seem to have a larger health impact than other mould species. Among respiratory diseases, inhalation fever and, to a lesser extent, childhood respiratory infections are linked to exposure to moulds. In contrast, the relationship between exposure to indoor moulds and diseases such as sinusitis, mucous irritation syndrome, recurrent respiratory infections in adults, COPD and pulmonary haemorrhage has not been clearly established. VIEWPOINT: There are still many scientific uncertainties in this field. However, the authorities are becoming more active in dealing with unhealthy buildings and encouraging research. CONCLUSION: The health impact of mouldy dwellings represents a major public health issue. It needs incentives from institutions and financial support as well as the involvement of many specialists.

[Housing and health counselling services in the management of allergic respiratory disease]. / Le Conseil Habitat-Santé dans la prise en charge des maladies allergiques respiratoires.

INTRODUCTION: Input from Housing and health counselling services is advisable when a patient's health seems to be impaired by their housing conditions. METHODS: 650 home visits have been performed by our organisation since 2002. Each visit includes a questionnaire to assess respiratory as well as non-respiratory indoor risk factors, Acarex test to assess mite-allergen content in mattress dust, mould sampling and, when appropriate, air sampling for measurement of volatile organic compounds and aldehydes. RESULTS: The dwellings studied were mostly flats located in the downtown and occupied by a tenant. In most instances, several health hazards were identified. These hazards, in decreasing occurrence included: mold (74.4%), mite infestation in mattress dust (56.3%), cleaning products accessible to children's'hands (47.8%), dangerous electrical circuits (21.1%), exposure to chemical air pollutants (9.0%), exposure to an electromagnetic field (2.8%). Numerous fungal species were identified often occurring in association. CONCLUSION: This service allowed the identification of numerous and various health hazards. Its efficacy and effectiveness remains to be evaluated.

[Indoor volatile organic compounds: concentrations, sources, variation factors]. / Composés organiques volatils intérieurs: concentrations, sources, facteurs de variabilité.

INTRODUCTION: Volatile organic compounds (V.O.C.) are part of urban air pollution and are also generated indoors from cleaning and maintenance products. BACKGROUND: VOC measurements are, on average, 10 times higher within homes than outside. Results of the national survey led by the Observatoire National de la Qualité de l'Air Intérieur demonstrated that up to 25% of French homes have very high or high concentrations of VOC. Indoor levels depend mainly on indoor sources. Aldehydes are included in many everyday life products. VOC originate from various household decorating and cleaning products. Some products are less detrimental to the environment and health and have special labelling. Indoor VOC levels also depend on the rate of air exchange and on household characteristics such as indoor temperature and humidity, age of the building, presence of smokers, and communication with a garage. VIEWPOINTS: The public may participate in maintaining good indoor air quality and the authorities should also improve regulations. CONCLUSION: VOC are part of everyday air pollution. Their sources and concentrations should be better monitored.

Wall relative humidity: a simple and reliable index for predicting Stachybotrys chartarum infestation in dwellings.

UNLABELLED: Because the indoor mold Stachybotrys chartarum has been considered as potentially responsible for serious health effects, its identification in dwellings with water damages is of utmost importance. As such dwellings are many, it would be of great value to have a simple and reliable index for predicting its presence. The aim of the study was to compare measurements of wall relative humidity (RH) to mold identification in 458 samples from 100 dwellings. Mold identification was performed by direct microscopic examination of a sample collected on the wall by the gummed paper technique. Mean (+/- s.d.) wall RH (%) was much higher (97.0 +/- 6.1) on the 30 samples where S. chartarum was identified compared with the 291 samples where other molds were identified (41.8 +/- 36.9) and to the 137 samples where no molds were identified (38.9 +/- 34.8). There was no straightforward relationship between wall and room RH. In conclusion, this study clearly demonstrate that the simple measurement of wall RH can be used as a reliable index for discarding and suspecting S. chartarum infestation in dwellings. PRACTICAL IMPLICATIONS: This paper suggests that very high relative humidity (RH) within walls is a strong risk factor for their infestation with the 'toxic mold' Stachybotrys chartarum. Besides, data from the literature demonstrate that other molds are able to produce mycotoxins when RH is very high. Thus, measurement of wall RH, which is easy to perform and very cheap, could be used as a screening tool to select those dwellings where mold identification should be performed and remediation should be promptly carried out.