CCNS Certified Clinical Nurse Specialist

Answer - D - The nurse reviews the laboratory results, knowing that a laboratory study that would assist in confirming the diagnosis is antistreptolysin O titer. A diagnosis of rheumatic fever is confirmed by the presence of two major manifestations or one major and two minor manifestations from the Jones criteria. In addition, evidence of a recent streptococcal infection is confirmed by a positive antistreptolysin O titer, streptozyme assay, or an anti-DNase B assay.