The short version
The dominant oral Haemophilus species — typically 2-15% of your total oral bacteria. Distinct from the disease-causing H. influenzae. Contributes to the nitric oxide pathway and is part of the healthy aerobic community. Reproducibly depleted in smokers.
Do
Eat more nitrate-rich foods and avoid smoking. H. parainfluenzae is part of the oral nitric oxide pathway and is sensitive to smoking exposure.
Avoid
Smoking and daily antiseptic mouthwashes. Both deplete H. parainfluenzae and the broader healthy aerobic oral community.
This information is for wellness purposes only and is not a medical assessment. Always consult a medical professional about any health concerns.