Air quality during the winter in Québec day-care centers.

Daneault, Serge; Beausoleil, Monique; Messing, Karen

doi:10.2105/ajph.82.3.432

Cited by 20 publications

(10 citation statements)

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“…In this study, large amounts of fungal aerospores and HDM-sensitization were both correlated to high AIH and / or previous water leak(s) or window condensation, which means that a poor indoor climate promotes growth of moulds and HDM (Wickman, 1993;Verhoeff et al, 1992). The high pC02 (21000 ppm) levels found in homes may be a further parameter for a poor indoor climate as the level of C 0 2 is an indicator of the quality of ventilation in general, and may thus serve as a marker for other pollutants (Burge, 1990;Daneault et al, 1992). On the other hand, as opposed to others (Lawenstein et al, 1986;Strachan, 1988), we found, as did Wickman (1993), no association between fungal growth and atopic diseases.…”

Section: Discussionmentioning

confidence: 99%

Mould Allergy in Schoolchildren in Relation to Airborne Fungi and Residential Characteristics in Homes and Schools in Northern Norway

1996

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During winter, airborne microfungi were collected from the homes and schools of 19 children sensitized to house dust mites (HDM) and 19 non‐atopic control children in the community of Sør‐Varanger, northern Norway. The samples were cultivated and microfungal growth was identified microscopically. Indoor humidity, temperature, carbon dioxide (CO2), allergic symptoms and sensitization were registered. Symptom data and information concerning sociodemographic and housing conditions were obtained using a questionnaire. Penicillium was the most common microfungus in both homes and schools, followed by different yeasts, Aspergillus, Cladosporium and Mucor. The number of infected homes was equal in the HDM‐sensitized and in the control group, but the mean aerospore counts were higher in the HDM‐sensitized than in the control group. The lowest aerospore counts were found in the schools. High airborne spore counts appeared to be related to high indoor humidity. Only four children were sensitized to fungi, and these children were also sensitized to other allergens, such as animal dander and pollen, and suffered from asthma, allergic rhinoconjuncitivits (AR) and atopic dermatitis (AD). Three of these four children also had high counts of aerospores in their homes. However, no consistent association between mould growth and sensitization to moulds could be observed. The health implications of indoor fungal exposure may be multifactorial.

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Section: Discussionmentioning

confidence: 99%

Mould Allergy in Schoolchildren in Relation to Airborne Fungi and Residential Characteristics in Homes and Schools in Northern Norway

1996

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“…High concentration of indoor air pollutants and carbon dioxide (CO 2 ) in DCC for children has been reported, and poor indoor air quality (IAQ) and ventilation conditions were associated with higher levels of CO 2 [21,3,15,4] and with other indoor air pollutants [24].…”

Section: Introductionmentioning

confidence: 99%

“…CO 2 is considered an indirect marker of IAQ in the absence of other sources besides the anthropogenic [5]. Its concentration could be highly influenced by the number of occupants in the room [10], human behaviours and building characteristics [4]. A high CO 2 concentration suggests a low air supply which may elicit symptoms due to higher concentrations of air pollutants [21].…”

Section: Introductionmentioning

confidence: 99%

CO2 concentration in day care centres is related to wheezing in attending children

et al. 2014

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Poor ventilation at day care centres (DCCs) was already reported, although its effects on attending children are not clear. This study aimed to evaluate the association between wheezing in children and indoor CO 2 (a ventilation surrogate marker) in DCC and to identify behaviours and building characteristics potentially related to CO 2 . In phase I, 45 DCCs from Lisbon and Oporto (Portugal) were selected through a proportional stratified random sampling. In phase II, 3 months later, 19 DCCs were further reassessed after cluster analysis for the greatest difference comparison. In both phases, children's respiratory health was assessed by ISAAC-derived questionnaires. Indoor CO 2 concentrations and building Communicated by David NadalWhat is known-what is new: Poor ventilation at day care centres (DCC) was already reported. The results of the present study suggest that poor ventilation in DCC could be related to wheezing in children. Even though natural actions could not be sufficient to provide ventilation and reduce CO 2 to acceptable levels, the increment of natural ventilation through effective open window practices and adjusting the number of children in each classroom may be considered.P. Carreiro-Martins : I. Caires : J. Araújo-Martins :

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“…There is little information available about the indoor environments of daycare centers. Two studies from the USA and Canada measured CO 2 in daycare centers, and concluded that the ventilation is often inadequate, with CO 2 ‐levels exceeding 1000 ppm (Daneault et al., 1992; Ferng and Lee, 2002). In one older Swedish study, CO 2 levels were lower (458–822 ppm) (Cars et al., 1992).…”

Section: Introductionmentioning

confidence: 99%

A nationwide study of indoor and outdoor environments in allergen avoidance and conventional daycare centers in Sweden

et al. 2006

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There is a need to improve the indoor environments of daycare centers, including reduction of building dampness and molds. Allergen avoidance daycare centers (AADC) in Sweden differ from ordinary daycare centers in many respects, with fewer indoor and building factors related to dust, allergens and irritants. This shows that the indoor environments of daycare centers can be improved. Data suggest that AADC may have lower levels of pet allergens, and this is beneficial for children with pet allergy. The effects of these improvements on indoor exposures and health of the children need to be further evaluated.

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Air quality during the winter in Québec day-care centers.

Cited by 20 publications

References 10 publications

Mould Allergy in Schoolchildren in Relation to Airborne Fungi and Residential Characteristics in Homes and Schools in Northern Norway

Mould Allergy in Schoolchildren in Relation to Airborne Fungi and Residential Characteristics in Homes and Schools in Northern Norway

CO2 concentration in day care centres is related to wheezing in attending children

A nationwide study of indoor and outdoor environments in allergen avoidance and conventional daycare centers in Sweden

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