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?

A. Candidiasis: Candidiasis is a common fungal infection that is not nationally notifiable. While it may require treatment, it does not need to be reported to the state health department for public health surveillance. B. Chlamydia: Chlamydia is a nationally notifiable sexually transmitted infection. Reporting to the state health department is required to monitor prevalence, track outbreaks, and implement public health interventions to reduce transmission. C. Herpes simplex virus: Genital herpes infections are not generally reportable to public health authorities in most states, though some jurisdictions may require reporting under specific circumstances. It is not considered nationally notifiable in the same way as chlamydia. D. Human papillomavirus: HPV infection is highly prevalent and usually asymptomatic, and it is not a nationally notifiable disease. Public health efforts focus on vaccination and screening rather than mandatory reporting.