Treatment of partner is required in all infections except-a) Candidab) Herpesc) Trichomonasd) Gardnerella

**Core Concept**
The question tests the understanding of sexually transmitted infections (STIs) and their treatment, focusing on the necessity of treating partners to prevent reinfection and spread of disease. **Sexually transmitted infections** require consideration of partner treatment to control the spread of infection.

**Why the Correct Answer is Right**
In the case of **Gardnerella**, also known as bacterial vaginosis, it is not classified as a traditional STI but rather as a condition that results from an imbalance of vaginal flora. Treating the partner is not typically required for **Gardnerella** infections, as they do not cause the condition.

**Why Each Wrong Option is Incorrect**
**Option A:** **Candida** infections can be sexually transmitted, and treating the partner may be necessary to prevent reinfection.
**Option B:** **Herpes** is a viral STI, and while treating the partner is not always necessary, it is crucial to inform them of the risk to prevent further transmission.
**Option C:** **Trichomonas** is a parasitic STI, and partner treatment is essential to prevent reinfection.

**Clinical Pearl / High-Yield Fact**
It's crucial to understand that not all infections require partner treatment, and **Gardnerella** is one such exception due to its non-STI nature and the fact that it results from an imbalance of normal vaginal flora.

**Correct Answer:** D. Gardnerella