Study of DDT and loss of clinically-recognized pregnancies in South Africa

这项关于早孕丢失(流产和死胎)与DDT接触有关的前瞻性研究的实地工作已经开始。 2010年初雇用并培训了一个实地小组，6月1日开始招生。从南非林波波省的6个村庄招收受试者，其中3个村庄目前正在使用滴滴涕控制疟疾。截至8月31日，已有209名受试者接受了资格评估，181人被录取。大约一半的登记对象来自喷洒了滴滴涕的村庄。在181人中，有8人被撤回，主要是因为他们歪曲了自己居住的村庄。在172名被跟踪的受试者中，有3人已经怀孕。 因此，实地工作运行良好。目前的研究设计是否会产生足够数量的妇女在登记时怀孕仍有待观察，以及登记的受试者是否有适当广泛的滴滴涕暴露分布也有待观察。

The field work has begun for this prospective study of early pregnancy loss (miscarriage and stillbirth) in relation to DDT exposure. A field team was hired and trained in early 2010, and enrollment began June 1. Subjects are being enrolled from 6 villages in Limpopo Province, South Africa, and DDT is currently in use for malaria control in 3 of them. As of August 31, 209 subjects have been evaluated for eligibility, and 181 were enrolled. About half of the enrolled subjects are from the villages sprayed with DDT. Of the 181, 8 were withdrawn, primarily because they had misrepresented their village of residence. Of the 172 subjects being followed, 3 have become pregnant. Thus, the field work is functioning well. Whether the present study design will yield adequate numbers of women who become pregnant while enrolled remains to be seen, as does whether the subjects enrolled have a suitably wide distribution of exposure to DDT.