Resurgence of Acute Rheumatic Fever in the Intermountain Area of the United States

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Abstract
We describe an outbreak of acute rheumatic fever that occurred in the intermountain area centered in Salt Lake City, Utah. Seventy-four children meeting the modified Jones criteria for the diagnosis of acute rheumatic fever were evaluated by the staff at Primary Children's Medical Center, Salt Lake City, from January 1985 through June 1986. This represents an eightfold increase over the average annual incidence at this hospital during the past decade. Carditis, a dominant feature of the outbreak, was confirmed by auscultation in 53 of the patients (72 percent). An additional 14 patients were found to have mitral regurgitation by Doppler ultrasound examination, raising the total incidence of carditis to 91 percent.