On November 22, 2005, a boy aged 20 months, who had been in excellent health, awoke several times during the night complaining of stomach pain. During the next 2 days, he ate little, slept more than usual, and had several episodes of vomiting. His parents thought he had symptoms similar to his father's illness the preceding week. On November 24, during the boy's morning and afternoon baths, his father noted red blotches and a bluish tinge to the boy's feet and hands. Concerned about dehydration, his parents offered cool water, which the boy drank readily. He immediately became lethargic, his abdomen became visibly distended, and he exhibited intermittent loss of consciousness. The boy was taken to an emergency department, where he went into cardiopulmonary arrest within minutes of arrival. Resuscitation efforts failed, and the boy died before a definitive diagnosis was made.