An study on status and influencing factors of mercury exposure in neonatal umbilical cord blood in Zhoushan Islands / 预防医学

ABSTRACT

Objective To investigate the mercury exposure level in cord blood of neonatal in Zhoushan Islands and to analyze the related factors,in order to provide scientific basis for relevant prevention and control measures.Methods From June 201 2 to July 201 3,peripheral blood and umbilical cord blood samples were collected in local women who delivered their babies in Zhoushan Islands.Questionnaire survey and mercury exposure test were performed.Results 3 052 maternal blood and neonatal umbilical cord blood samples were tested,and the mean,median,P25 and P75 of the maternal blood mercury were 5.33 ±3.69,4.63,2.8 and 8.2 μg/kg respectively.And the mean,median,P25 and P75 of the cord blood mercury were 7.72 ±4.87,7.31 ,4.7 and 1 1 .2 μg/kg.Single factor analysis showed that the neonatal umbilical cord blood mercury levels were associated the intake of pan -fried mackerel during pregnancy (OR =1 .79,P <0.01 ).No association was found with the sex of newborn,the intake of iron,calcium,and vitamin during pregnancy,the number of mending tooth,the use of whitening cosmetics,the intake of fish and seafood,father's smoking,the average family income and residence time.Multivariate Logistic regression analysis showed that the neonatal umbilical cord blood mercury levels were associated the intake of pan -fried mackerel during pregnancy (OR =1 .96,P <0.01 ).Conclusion Mercury levels in cord blood in Zhoushan area are detected at a high level;the intake of pan -fried mackerel could be one of the major sources of mercury accumulation in neonates.There is an association between the mercury levels of maternal blood and neonatal umbilical cord blood.