Glynn A W, Wernroth L, Atuma S, Linder C E, Aune M, Nilsson I, Darnerud P O
The Swedish National Food Administration, Uppsala.
Sci Total Environ. 2000 Feb 10;246(2-3):195-206. doi: 10.1016/s0048-9697(99)00458-1.
Results from the Swedish control programme regarding organochlorines in food were used to determine time trends of organochlorine concentrations in adipose tissues from swine (4-8 months old) and bovines (non-dairy, 12-36 months) slaughtered between 1991 and 1997. Moreover, possible regional differences in concentrations were studied, as well as differences in concentrations depending on sex and age of the slaughtered animals. Multiple linear regression indicated that the concentrations of PCB, p,p'-DDE, HCB and alpha-HCH decreased by 4-17% per year, suggesting that the decline in organochlorine concentrations in the Swedish environment and biota reported during the 1970s-1990s also has occurred in meat-producing animals during the 1990s. The concentrations of PCB, DDE and HCB in bovines and PCB and DDE in swine were 1.4-3.8-fold higher in the southern parts of Sweden than in the northern parts of the country, indicating a regional difference in exposure of the animals. The organochlorine concentrations were higher in bovines than in swine, and declined faster in swine than in bovines. Moreover, the concentrations of CB 153 and p,p'-DDE were similar in bovines, but in swine the average concentrations of the two compounds differed two-fold. Apart from possible species differences in metabolism of organochlorines, this may be due to differences in the age at slaughter between swine and bovines, and differences in husbandry of the animals. In the latter case, swine are generally kept inside during their whole life span, whereas bovines are kept outside grazing during the summer period. Finally, a sex-dependent difference in concentrations was indicated in swine, but not in bovines. Our study shows that a lot of information can be 'extracted' from control program results.
瑞典食品中有机氯控制项目的结果被用于确定1991年至1997年间屠宰的猪（4至8个月大）和牛（非奶牛，12至36个月）脂肪组织中有机氯浓度的时间趋势。此外，还研究了浓度在地区上可能存在的差异，以及取决于屠宰动物性别和年龄的浓度差异。多元线性回归表明，多氯联苯、p,p'-滴滴涕、六氯苯和α-六氯环己烷的浓度每年下降4%至17%，这表明20世纪70年代至90年代期间瑞典环境和生物群中有机氯浓度的下降在20世纪90年代的肉类生产动物中也已出现。瑞典南部地区牛体内多氯联苯、滴滴涕和六氯苯的浓度以及猪体内多氯联苯和滴滴涕的浓度比该国北部地区高1.4至3.8倍，这表明动物接触情况存在地区差异。牛体内的有机氯浓度高于猪，且猪体内的下降速度比牛快。此外，牛体内CB 153和p,p'-滴滴涕的浓度相似，但猪体内这两种化合物的平均浓度相差两倍。除了有机氯代谢可能存在的物种差异外，这可能是由于猪和牛屠宰时的年龄差异以及动物饲养方式的不同。在后一种情况下，猪通常一生都饲养在室内，而牛在夏季则在室外放牧。最后，猪体内显示出浓度存在性别差异，而牛体内未显示出这种差异。我们的研究表明，可以从控制项目结果中“提取”出大量信息。
