A nurse is caring for a child who was admitted with suspected rheumatic fever. The provider prescribes an anti-streptolysin O (ASO) titer. The parent asks the nurse the purpose of the test. What should the nurse respond?

D This test will confirm if your child has immunity to streptococcal bacteria. B This test will confirm if your child had a recent streptococcal infection. A This test will indicate if your child has rheumatic fever. C This test will indicate if your child has a therapeutic blood level of an aminoglycoside.