February 1979, Vol 133, No. 2 >

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Article | February 1979

Prenatal Methylmercury Poisoning: Clinical Observations Over Five Years

Laman Amin-Zaki, MD; Mohammed A. Majeed, MD; Sami B. Elhassani, MD; Thomas W. Clarkson, PhD; Michael R. Greenwood, MS; Richard A. Doherty, MD

Am J Dis Child. 1979;133(2):172-177. doi:10.1001/archpedi.1979.02130020064013.

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• Thirty-two infants prenatally exposed to methylmercury and their mothers were examined over a five-year period after the Iraqi methylmercury epidemic. Severity of poisoning in mothers was related to the peak mercury concentration in their hair and in the infants to the maximum concentration in maternal hair during pregnancy. In nine cases of cerebral palsy, methylmercury exposure occurred only during the last trimester. All infants except three (two were orphaned soon after birth and one was bottle-fed) were exposed postnatally via suckling. Whereas the mother's symptoms usually improved, the damage to the fetal nervous system appears to be permanent. Milder cases previously not identified in other studies are reported. The syndrome consists of varying degrees of developmental retardation in addition to exaggerated tendon reflexes and the pathologic extensor plantar reflex (minimal brain damage syndrome).

(Am J Dis Child 133:172-177, 1979)

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Amin-Zaki L, Majeed MA, Elhassani SB, Clarkson TW, Greenwood MR, Doherty RA. Prenatal Methylmercury Poisoning: Clinical Observations Over Five Years. Am J Dis Child. 1979;133(2):172-177. doi:10.1001/archpedi.1979.02130020064013.

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