Prevotella intermedia (Pi): The Hormone-Sensitive Inflamer

Aug 10, 2026 | Pi | Orange Complex

Prevotella intermedia (Pi), an orange complex periodontal pathogen included in MicrobeLinkDx bacterial testing

Meet Pi: The Hormone-Sensitive Inflamer 🔥

Anaerobic Inflammatory Pathogen | Orange Complex

Prevotella intermedia — or Pi — is strongly associated with inflammation, swollen tissues, and bleeding gums.

But here’s what makes Pi particularly interesting: its levels may increase during hormonal changes, including pregnancy.

Pi is commonly found in inflamed periodontal tissues and can contribute to continued irritation and inflammation around both teeth and dental implants.

Quick way to remember Pi:

🟠 Orange Complex
🔥 The Hormone-Sensitive Inflamer
🩸 Think bleeding + inflammation
🤰 Levels may increase during hormonal changes and pregnancy
🦷 May contribute to inflammation around teeth and implants

Seeing Pi on a MicrobeLinkDx® Report?

The amount detected, other bacteria present, and the patient’s clinical findings all matter when interpreting the microbial picture.

Interpreting My Results →

Pi Research & Updates

We’ll continue adding new research, oral-systemic findings, clinical information, and resources related to Pi as they become available.

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