Cytologically diagnosed Gardnerella vaginalis infection and cervical (pre)neoplasia as established in population-based cervical screening.

Objective: Cervical inflammation has been proposed as a cofactor in the development of cervical cancer. The purpose of this study was to document the prevalence of cervical (pre)neoplastic changes in asymptomatic women with a cytologically diagnosed Gardnerella vaginalis infection.

Study Design: Data were collected from 800,498 Dutch asymptomatic women, participating in the Dutch national screening program. Prevalences of (pre)neoplasia were calculated for G vaginalis smears using a healthy flora as reference.

Results: The prevalence of G vaginalis infection was 0.6 per thousand. The odds ratio for (pre)neoplasia was significantly higher in smears with G vaginalis infection compared with smears of women with a healthy vaginal flora (odds ratio, 10.3; 95% confidence interval, 6.6-16.1).

Conclusion: Cytologically diagnosed G vaginalis smears show a strong covariation with the presence of cervical (pre)neoplasia. Future research should therefore focus on the exact causal relation between cytologic G vaginalis infection and the presence of (pre)neoplastic changes of the cervix.