Division of Health Sciences, Graduate School of Medical Science, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 920-0942, Japan,
Environ Health Prev Med. 2009 Nov;14(6):353-60. doi: 10.1007/s12199-009-0107-8. Epub 2009 Sep 1.
The American-Vietnam War ended over 35 years ago, but dioxins still remain in human tissue and Vietnam's environment. The main objective of this study was to assess the correlation between dioxin concentration in soil, sediment and breast milk in one of the areas sprayed with herbicide, namely Cam Chinh commune, Quang Tri province, using a geographic information system (GIS).
The concentration of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in soil, sediment and breast milk samples was determined and the data analyzed using the geostatistical log-normal Kriging algorithm.
The mean dioxin levels in soil and breast milk in the sprayed area were significantly higher than those in the non-sprayed area. The distribution pattern of PCDDs and PCDFs in soil was different, and there were no significant correlations between the estimated dioxin levels in soil obtained by the Kriging method and those in breast milk.
The possibility remains that another exposure route, such as exposure to herbicides used during the Vietnam War, might affect dioxin levels in breast milk, although more soil data are needed to make more reliable geographical estimations.
美国-越南战争已经结束 35 年以上，但二恶英仍存在于人类组织和越南的环境中。本研究的主要目的是利用地理信息系统（GIS）评估在一个喷洒过除草剂的地区——广治省 Cam Chinh 公社，土壤、沉积物和母乳中二恶英浓度之间的相关性。
对土壤、沉积物和母乳样本中多氯二苯并对二恶英（PCDDs）和多氯二苯并呋喃（PCDFs）的浓度进行了测定，并使用地质统计对数正态克立格算法对数据进行了分析。
喷洒区土壤和母乳中二恶英的平均水平明显高于未喷洒区。土壤中 PCDDs 和 PCDFs 的分布模式不同，克立格法估计的土壤中二恶英水平与母乳中二恶英水平之间无显著相关性。
尽管需要更多的土壤数据来进行更可靠的地理估计，但仍有可能通过接触越战期间使用的除草剂等其他暴露途径影响母乳中的二恶英水平。
