National Exposure Research Laboratory, United States Environmental Protection Agency, Cincinnati, OH 45268, USA.
J Environ Public Health. 2011;2011:242457. doi: 10.1155/2011/242457. Epub 2011 Jun 7.
The objective of this study was to quantify and describe the distribution of the 36 molds that make up the Environmental Relative Moldiness Index (ERMI).
As part of the 2006 American Healthy Homes Survey, settled dust samples were analyzed by mold-specific quantitative PCR (MSQPCR) for the 36 ERMI molds. Each species' geographical distribution pattern was examined individually, followed by partitioning analysis in order to identify spatially meaningful patterns. For mapping, the 36 mold populations were divided into disjoint clusters on the basis of their standardized concentrations, and First Principal Component (FPC) scores were computed.
The partitioning analyses failed to uncover a valid partitioning that yielded compact, well-separated partitions with systematic spatial distributions, either on global or local criteria. Disjoint variable clustering resulted in seven mold clusters. The 36 molds and ERMI values themselves were found to be heterogeneously distributed across the United States of America (USA).
本研究旨在定量描述构成环境相对霉菌指数（ERMI）的 36 种霉菌的分布情况。
作为 2006 年美国健康住宅调查的一部分，采用霉菌特异性定量 PCR（MSQPCR）方法对尘埃样本进行了 36 种 ERMI 霉菌的分析。单独检测了每种物种的地理分布模式，然后进行分区分析以确定具有空间意义的模式。为了制图，根据标准化浓度将 36 种霉菌种群分为不相交的聚类，并计算第一主成分（FPC）得分。
分区分析未能发现有效的分区，无法生成具有系统空间分布的紧凑、分离良好的分区，无论是在全球还是局部标准下都是如此。不相交的变量聚类产生了 7 个霉菌聚类。发现 36 种霉菌和 ERMI 值本身在美国各地呈不均匀分布。
