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Grand Rounds
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| Mercury Exposure Aboard an Ore Boat Richard R. Roach and Stephanie Busch Department of Internal Medicine, Kalamazoo Center for Medical Studies, Kalamazoo, Michigan, USA Abstract
 |  | | Kalamazoo Center for Medical Studies |
Two maritime academy interns (X and Y) were exposed to mercury vapor after spilling a bottle of mercury on the floor in an enclosed storeroom while doing inventory aboard an ore boat. During a 3-day period, intern Y suffered transient clinical intoxication that resolved after he was removed from the environment and he showered and discarded all clothing. His initial serum mercury level dropped from 4 ng/mL to < 0.05 ng/mL. Intern X had an initial level of 11 ng/mL, which continued to rise to a maximum of 188.8 ng/mL. He complained of tremulousness, insomnia, and mild agitation and was hospitalized. He had showered and discarded all clothing except his footwear earlier than intern Y. Intern X's continued exposure due to mercury in the contaminated boots during the 2 weeks before hospitalization was presumed to be the cause. Removing his footwear led to resolution of his toxic symptoms and correlated with subsequent lowered serum mercury levels. Chelation was initiated as recommended, despite its uncertain benefit for neurologic intoxication. Mercury is used in the merchant marine industry in ballast monitors called king gauges. New engineering is recommended for ballast monitoring to eliminate this hazard. Key words: ballast gauge, chelation therapy, dimercaptosuccinic acid, mercury intoxication, neurotoxicity. Environ Health Perspect 112:910-913 (2004) . doi:10.1289/ehp.6798 available via http://dx.doi.org/ [Online 10 March 2004]
Address correspondence to R.R. Roach, Kalamazoo Center for Medical Studies, 1000 Oakland Dr., Kalamazoo, MI 49008 USA. Telephone: (269) 337-6300. Fax: (269) 337-4234. E-mail: roach@kcms.msu.edu We acknowledge the U.S. Steel Great Lakes Fleet. Because, at the time of the occurrence, R.R. was employed by St. Luke's Hospital (Duluth, MN) , which contracted with the U.S. Steel Great Lakes Fleet for occupational medical care, the authors declare a competing financial interest. Received 10 October 2003 ; accepted 10 March 2004.
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