Organochlorine pesticides (OCPs) have been used for many decades, both for the control of pests in agriculture and for the control of vectors of human and animal diseases. Several recent studies have reported significant concentrations of these compounds in multiple environmental substrates due to their persistence, as well as the effect they have on ecosystem health, human health, and wildlife populations. In the present study, organochlorine pesticide residues were determined and quantified in 260 blood samples from different populations of the Virginia opossum (Didelphis virginiana) from 11 rural ex-henequen sites of the state of Yucatan, Mexico. The organochlorine groups detected, following an order of predominance and concentration, were: ΣDienes (0.0557 ppm) > ΣDDTs (0.0481 ppm) > ΣEndosulfans (0.0376 ppm) > and ΣHCHs (0.0319 ppm). The highest levels of OCPs were recorded in the opossums captured in the towns of Chicxulub and Cacalchen. In 6 of the 11 localities, the OCPs detected in the opossums showed significant differences in concentration, whereas the opossums in 4 of the 11 localities did not present this difference. The results confirm the presence and persistence of OCPs in the rural environmental of Yucatan due to both the misuse and abuse of the OCPs by rural populations. In addition, the synanthropic characteristics and abundant populations of D. virginiana in the Yucatecan region make it a good candidate to serve as a biomonitor of environmental pollution in the Yucatan Peninsula. This could aid in assessing the effects exposure to pesticides and other contaminants have on the health of the Yucatecan population, whether short, medium, or long term.

中文翻译：

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来自墨西哥尤卡坦州前Henequen农村地区弗吉尼亚负鼠（Didelphis virginiana）的腹膜内种群血液中的有机氯农药残留。

有机氯杀虫剂（OCPs）已经用于控制农业中的害虫和控制人类和动物疾病的载体已有数十年的历史了。最近的几项研究报告说，由于它们的持久性及其对生态系统健康，人类健康和野生动植物种群的影响，这些化合物在多种环境底物中的浓度很高。在本研究中，对来自墨西哥尤卡坦州11个农村前遗骸站点的弗吉尼亚负鼠（Didelphis virginiana）不同种群的260个血液样本中的有机氯农药残留进行了测定和定量。按照优势和浓度的顺序，检测到的有机氯基团为：Σ二烯（0.0557 ppm）>ΣDDT（0.0481 ppm）>Σ硫丹（0.0376 ppm）>和ΣHCH（0.0319 ppm）。奇克苏鲁布和卡卡琴镇捕获的负鼠中的OCP含量最高。在11个地点中的6个中，负鼠中检测到的OCP浓度存在显着差异，而11个地点中的4个中的负鼠没有这种差异。结果证实，由于农村人口滥用和滥用OCP，尤加坦的农村环境中存在OCP。此外，尤卡坦半岛地区的维吉尼亚D. virginiana的同时人类特征使其成为尤卡坦半岛环境污染生物监测者的良好候选者。这可以帮助评估暴露于农药和其他污染物对Yucatecan人群的健康（短期，中期或长期）的影响。