A patient diagnosed with bacterial vaginosis should be advised that her sexual partner:

In the case of bacterial vaginosis (BV), it is important to understand the nature of the condition. BV is not classified as a sexually transmitted infection (STI), but rather as a disruption of the normal vaginal flora. This means that it is caused by an imbalance in the naturally occurring bacteria rather than an infection transferred through sexual contact.

Because of this, sexual partners do not typically require treatment for bacterial vaginosis. Advising that the partner does not need treatment aligns with the current understanding of how BV functions. Treating the partner is generally not recommended since the bacteria causing BV are part of the normal flora and do not necessitate intervention.

The other options suggesting specific treatments or medications are not appropriate within the context of bacterial vaginosis. Medications like ceftriaxone and doxycycline are used for treating specific STIs, but are unnecessary for BV. Similarly, metronidazole is an effective treatment for BV, but it should not be given to a partner, as they do not need it based on the nature of the condition. Clotrimazole cream is antifungal and is used for yeast infections, not BV.

Therefore, advising that the sexual partner does not need treatment is the correct and evidence-based approach to managing