An infection control nurse is reviewing the medical records of several clients. Which of the following infections should the nurse report to the Centers for Disease Control and Prevention?

A. Candidiasis: Candidiasis is a common fungal infection and is not a nationally notifiable disease. Reporting to the CDC is not required for routine cases. B. Pelvic inflammatory disease: PID is a complication of sexually transmitted infections, but it itself is not a reportable condition. The underlying infection, if it is a notifiable STI, may need to be reported instead. C. Methicillin-resistant Staphylococcus aureus: MRSA infections acquired in the community or healthcare settings are not universally reportable to the CDC. Reporting requirements vary by state, but MRSA is generally monitored rather than mandatorily reported nationally. D. Syphilis: Syphilis is a nationally notifiable sexually transmitted infection. Cases must be reported to local and state health departments, which then notify the CDC. This allows for public health tracking, contact tracing, and prevention of further transmission.