A nurse in a provider's office is reviewing the laboratory results of a group of clients. The nurse should identify that which of the following sexually transmitted infections is a nationally notifiable infectious disease that should be reported to the state health department?

Rationale: A. Human papillomavirus: HPV is a common viral STI, but it is not classified as a nationally notifiable disease. Although certain strains are linked to cervical cancer, cases of HPV infection are not routinely reported to public health authorities. B. Candidiasis: Candidiasis is a fungal infection, not a sexually transmitted infection. It is typically caused by Candida overgrowth and does not require notification to public health departments, as it is not considered a reportable condition. C. Chlamydia: Chlamydia is one of the most commonly reported nationally notifiable STIs in the U.S. All confirmed cases must be reported to state or local health departments for monitoring, surveillance, and public health intervention. D. Herpes simplex virus: Although HSV is a common STI, it is not routinely included on the list of nationally notifiable diseases unless part of an outbreak or neonatal herpes case. Therefore, individual adult cases are typically not reported.