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Crawl spaces as reservoirs for transmission of mold to the livable part of the home environment

机译：爬行空间作为将霉菌传播到家庭环境中宜居部分的容器

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Background: Recent studies suggest that exposure to mold in damp buildings is an important environmental risk factor for childhood respiratory illness. One potential source of a damp home, is crawl space construction. A poorly constructed crawl space not only presents the possibility of contributing to a 'damp' home but can also become a reservoir for fungal growth. Objectives: Fungal levels in the livable indoor environment have been characterized in other studies, but little has been done to assess the potential for mold growth in the crawl space. This study examines the potential for mold growth and subsequent transmission from the crawl space into the home environment. Methods: In this study, we assessed mold contamination levels within crawl spaces from 238 study homes in North Carolina. We determined whether air leakage from the heating, ventilation, and air conditioning (HVAC) system and associated ductwork, transmitted viable mold spores from the crawl space into the living spaces within the home. Results: The results indicate that 19% of the homes demonstrated transmission of mold spores from the crawl space into the indoor environment, 45% of the homes displayed no transmission, and 36% of the homes were indeterminate. Conclusions: The results support the hypothesis that the HVAC system can serve as a conduit for the transmission of mold spores from the crawl space to the indoor environment of a home. This transmission likely affects children's health, given the significant amount of time they spend in the home environment. For low-income families, the HVAC system may contribute an additional source of childhood exposure and highlights the importance of the assessment of indoor environmental hazards.
机译：背景：最近的研究表明，在潮湿的建筑物中接触霉菌是儿童呼吸道疾病的重要环境风险因素。潮湿房屋的潜在来源之一是爬行空间的建设。结构不良的爬行空间不仅可能为“潮湿”的房屋提供帮助，而且还可能成为真菌生长的蓄水池。目标：宜居室内环境中的真菌水平已在其他研究中进行了描述，但很少进行评估爬虫空间中霉菌生长的可能性。这项研究检查了霉菌生长以及随后从爬行空间传播到家庭环境的可能性。方法：在这项研究中，我们评估了北卡罗来纳州238个研究房屋的爬行空间内的霉菌污染水平。我们确定了采暖，通风和空调（HVAC）系统以及相关风管的漏气是否将可行的霉菌孢子从爬网空间传输到了房屋内的居住空间中。结果：结果表明，有19％的房屋显示霉菌孢子从爬行空间传播到室内环境中，有45％的房屋没有传播，有36％的房屋不确定。结论：该结果支持以下假设：HVAC系统可以用作霉菌孢子从爬行空间到家庭室内环境的传播管道。考虑到他们在家庭环境中花费的大量时间，这种传播可能会影响儿童的健康。对于低收入家庭，暖通空调系统可能会增加儿童暴露的额外来源，并强调评估室内环境危害的重要性。

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