Lead excretion in milk of accidentally exposed dairy cattle

被引:10
作者
Bischoff, Karyn [1 ,2 ]
Higgins, William [3 ]
Thompson, Belinda [1 ,2 ]
Ebel, Joseph G. [1 ]
机构
[1] Cornell Univ, New York State Vet Diagnost Ctr, Ithaca, NY 14850 USA
[2] Cornell Univ, Dept Populat Med & Diagnost Sci, Ithaca, NY USA
[3] Centreville Anim Hlth Lab, Centreville, MD USA
来源
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT | 2014年 / 31卷 / 05期
关键词
milk; lead contamination; dairy cattle; lead; cattle; BLOOD LEAD; CADMIUM; COWS;
D O I
10.1080/19440049.2014.888787
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Lead (Pb) exposure in dairy cattle is associated with economic losses due to mortality and treatment costs, but with production animals there is also risk to the human food chain. The first objective of this study was to quantify the Pb concentration in milk from Pb-exposed cattle. The second objective was to correlate blood and milk Pb concentrations from individual cows. The third objective was long-term monitoring to determine the duration of milk contamination after exposure ceased. A dairy herd of more than 100 cows was accidentally exposed to Pb-contaminated feed. Milk and blood were collected for Pb analysis. Serial collection of milk samples continued for 2.5years. The initial concentration of Pb in bulk tank milk was 0.0999mgl(-1). The highest milk Pb concentration from an individual cow was 0.4657mgl(-1) and the highest blood Pb concentration was 1.216mgl(-1). One milk sample collected at the end of the study (day 922) contained 0.0117mgPbl(-1) of Pb. The calculated relationship between milk (y) and blood (x) Pb concentration was ln(y)=3.4(x)-2.21 (R-2=0.98).
引用
收藏
页码:839 / 844
页数:6
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