Analysis of the health risk of exposure to breast milk mercury in infants in Taiwan.
The aim of this study was to assess the total concentration and health risk to infants of breast milk mercury in urban mothers and mothers married to fishermen in relation to fish intake in Taiwan. A total of sixty-eight healthy mothers were recruited for the study. The breast milk mercury geometric mean concentration was 2.02 microgl(-1) (n=56, range: 0.24-9.45 microgl(-1)) for the city group and 2.04 microgl(-1) (n=12, range: 0.26-8.62 microgl(-1)) for the fishermen's group. Of the three sources of mercury exposure (i.e., ingestion (breast milk), inhalation (ambient air), and dermal exposure (shower)), breast-feeding was found to be the largest (96.3-99.6% of the total). From a Monte Carlo simulation, in which methyl mercury accounted for about 50% of total mercury, the hazard quotient (exposure estimate/oral minimal risk level or target organ toxicity dose) exceeded 1.0 for 12.9% of urban babies and 18.8% of fishermen's babies (chronic oral minimal risk level and target organ toxicity dose: 3 x 10(-4)mgkg(-1)d(-1)). The calculated mercury exposure was 3.02 x 10(-1) microgkg(-1)d(-1) for a 3.49 kg urban baby boy and 3.06 x 10(-1) microgkg(-1)d(-1) for a 3.44 kg urban baby girl. These results suggest the life style of mothers (eating raw fish and shellfish such as used in "Sashimi" and "Sushi," and vitamin supplementation) may influence the mercury concentration in breast milk.
Chien
Ling-Chu
LC
School of Public Health, Taipei Medical University, 250 Wu-Hsing Street, Taipei 110, Taiwan, ROC.
Han
Bor-Cheng
BC
Hsu
Chun-Sen
CS
Jiang
Cheun-Bin
CB
You
Hung-Jiun
HJ
Shieh
Ming-Jer
MJ
Yeh
Ching-Ying
CY
D000328:Adult; D000818:Animals; D004781:Environmental Exposure / Q000032:analysis*; D004785:Environmental Pollutants / Q000032:analysis*; D005260:Female; D005399:Fishes; D005506:Food Contamination; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008767:Methylmercury Compounds / Q000032:analysis*; D008895:Milk, Human / Q000737:chemistry*; D009010:Monte Carlo Method; D011247:Pregnancy; D018570:Risk Assessment; D012758:Shellfish; D035501:Uncertainty
D004785:Environmental Pollutants; D008767:Methylmercury Compounds