The parent of a 6-year-old child arrives at a clinic because the child has been experiencing itchy, red, and swollen eyes. The nurse notes a discharge from the eyes and sends a culture to the laboratory for analysis. Chlamydial conjunctivitis is diagnosed. On the basis of this diagnosis. the nurse determines that which requires further investigation?

A. "This test will confirm if your child had a recent streptococcal infection."
Explanation:
The anti-streptolysin O (ASO) titer is a blood test used to detect the presence of antibodies against streptolysin O, a toxin produced by group A Streptococcus bacteria. A rise in ASO titers indicates a recent streptococcal infection. It does not confirm rheumatic fever directly but helps in identifying a recent streptococcal infection, which is a predisposing factor for rheumatic fever.
B. "This test will indicate if your child has rheumatic fever."
Explanation: While a positive ASO titer may suggest a recent streptococcal infection, it does not directly indicate rheumatic fever. The diagnosis of rheumatic fever involves a combination of clinical criteria, including evidence of a recent streptococcal infection, along with specific signs and symptoms.
C. "This test will confirm if your child has immunity to streptococcal bacteria."
Explanation: The ASO titer does not measure immunity to streptococcal bacteria. It specifically detects antibodies produced in response to a recent streptococcal infection.
D. "This test will indicate if your child has a therapeutic blood level of an aminoglycoside."
Explanation: The ASO titer is not used to monitor therapeutic blood levels of aminoglycosides. It is specific to detecting antibodies related to streptococcal infections and is not related to aminoglycoside therapy.

A. "Has your child been exposed to anyone with chicken pox?"
While chickenpox is caused by a different virus (varicella-zoster virus) and is not directly linked to rheumatic fever, the nurse might inquire about exposure to contagious illnesses as a general part of the assessment.
B. "Has any family member had a sore throat within the past few weeks?"
This question is relevant because rheumatic fever often follows an untreated or inadequately treated group A streptococcal infection, such as strep throat. A sore throat in a family member could indicate the presence of streptococcal infection, which is a crucial factor in the development of rheumatic fever.
C. "Has any family member had a gastrointestinal disorder in the past few weeks?"
Gastrointestinal disorders are not directly associated with the development of rheumatic fever. However, a comprehensive medical history might include questions about recent illnesses to understand the overall health context.
D. "Has your child had difficulty urinating?"
Difficulty urinating is not a typical symptom or risk factor associated with rheumatic fever. This symptom would likely prompt investigation into other potential issues but is not specifically related to rheumatic fever.