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Long-term use of high-efficiency vacuum cleaners and residential airborne fungal-spore exposure

机译：长期使用高效吸尘器和居民空气传播的真菌-孢子接触

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Exposure to fungal allergens is an important contributor to allergic respiratory disease, but information on the efficacy of residential fungal allergen-avoidance in allergic-disease management is lacking. Using vacuum cleaners with high-efficiency exhaust filtration is one method recommended for reducing residential allergen exposure levels, but their use to reduce fungal-spore exposure levels has not been evaluated. To evaluate the effectiveness of high-efficiency vacuuming to control airborne fungal-spore levels, fungal bioaerosols were repeatedly assessed over the course of 10 months in homes randomly assigned to groups using either conventionally filtered (control) or high-efficiency-filtered vacuum cleaners for routine vacuum cleaning. Air samples were analyzed for three fungal-spore categories representing taxa with predominantly outdoor sources and one representing taxa that commonly have indoor sources. In a two-way analysis of variance, sampling period had a significant effect on mean levels of all fungal-spore categories. Vacuum cleaner type had a marginally significant effect on the indoor spore category, with one high-efficiency vacuum group mean (of three) significantly lower than one control mean. No effect was observed of vacuum cleaner type on outdoor spore categories. Including home-environment variables in analysis of covariance models strengthened the effect of the vacuum-type treatment on the indoor spore category, with no effect on the three outdoor spore categories. Decreased indoor spore levels vs. controls were only observed in high-efficiency vacuum groups during the last sampling period, at the end of the heating season. The results suggest that using a vacuum with high-efficiency filtered exhaust could have some modest effectiveness in controlling airborne fungal-spore exposure in homes when infiltration of outdoor air is very limited.
机译：暴露于真菌过敏原是导致过敏性呼吸系统疾病的重要因素，但是缺乏关于避免居住真菌过敏原在过敏性疾病管理中功效的信息。建议使用具有高效排气过滤功能的真空吸尘器来降低居民的过敏原暴露水平，但尚未评估其用于减少真菌-孢子暴露水平的方法。为了评估高效吸尘控制空气中真菌孢子水平的有效性，在随机分配给各组的家庭中，使用常规过滤（对照）或高效过滤的真空吸尘器在10个月的过程中反复评估了真菌生物气溶胶。常规真空清洁。分析了空气样本中的三种真菌-孢子类别，这些类别代表主要来自室外的分类单元，另一类代表通常具有室内来源的分类单元。在方差的双向分析中，采样时间对所有真菌-孢子类别的平均水平都有显着影响。真空吸尘器类型对室内孢子类别的影响微乎其微，其中一个高效真空组的平均值（三个）明显低于一个对照组的平均值。没有观察到真空吸尘器类型对室外孢子种类的影响。在协方差模型分析中包括家庭环境变量，可以增强真空处理对室内孢子类别的影响，而对三个室外孢子类别没有影响。与对照组相比，室内孢子水平下降的情况仅在采暖季节结束时的最后一个采样期间的高效真空组中观察到。结果表明，在室外空气渗透非常有限的情况下，使用带有高效过滤排气的真空装置在控制家庭中空气传播的真菌-孢子接触方面可能会产生一些适度的效果。

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