![]() ![]() Confirmed: A clinically compatible case in which laboratory tests have confirmed exposure.Probable: A clinically compatible case in which a high index of suspicion (credible threat or patient history regarding location and time) exists for elemental mercury exposure, or an epidemiologic link exists between this case and a laboratory-confirmed case.Suspected: A case in which a potentially exposed person is being evaluated by healthcare workers or public health officials for poisoning by a particular chemical agent, but no specific credible threat exists.Environmental: Detection of mercury in environmental samples.Fish consumption can elevate total whole blood mercury concentrations. A urinary mercury concentration ≥ 10 ug/L or a total whole blood mercury concentration ≥ 10 ug/L is an unusual level of exposure for a person with no known occupational exposure to mercury. Biologic: A case with an elevated urinary or whole blood mercury concentration.Signs and symptoms might include neuropsychiatric disturbances (e.g., memory loss, irritability, or depression), tremor, paresthesias, gingivostomatitis, flushing, discoloration and desquamation of the hands and feet, and hypertension (1-6). Chronic exposure results in neurologic, dermatologic, and renal manifestations. Acute toxicity might result in fever, fatigue, and clinical signs of pneumonitis. Inhalational exposure is the most typical route of elemental mercury toxicity. ![]()
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