National survey of the levels of persistent organochlorine pesticides in the breast milk of mothers in China.
Environ Pollut. 2011 Feb;159(2):524-31. Epub 2010 Nov 19. PMID: 21093969
Key Laboratory of Chemical Safety and Health, and National Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, 7 Panjiayuan nanli Road, Chaoyang District, Beijing 100021, China.
The occurrence of persistent organochlorine pesticides (OCPs) in breast milk samples collected from mothers from twelve provinces in mainland China was investigated. Dichlorodiphenyltrichloroethanes (DDTs) were the most prevalent agent, followed by HCHs and HCB, whereas levels of chlordane compounds, drins and mirex were lower. The relatively lower DDE/DDT ratio in the Fujian rural area suggested more recent exposure to DDT than in other areas. The mean level of DDTs in breast milk from the southern China was higher than those from northern China (p<0.05). A positive correlation was observed between concentration of DDTs in human milk and consumption of animal-origin food, suggesting that this parameter could play an important part in influencing OCPs burdens in lactating women. The mean estimated daily intakes of different OCPs for breastfed infants were lower than the tolerable daily intake.