Table 1.
The Nugent scoring of Gram-stained smears for diagnosis of bacterial vaginosis.
| Organism (Morphotype) | Number/Oil Immersion Field | Score |
|---|---|---|
|
Lactobacillus-like (parallel sided, Gram-positive rods) |
>30 | 0 |
| 5–30 | 1 | |
| 1–4 | 2 | |
| <1 | 3 | |
| 0 | 4 | |
|
Mobiluncus-like (curved, Gram-negative rods) |
>5 | 2 |
| <1–4 | 1 | |
| 0 | 0 | |
|
Gardnerella/bacteroides-like (tiny, gram variable coccobacilli and pleomorphic rods with vacuoles) |
>30 | 4 |
| 5–30 | 3 | |
| 1–4 | 2 | |
| <1 | 1 | |
| 0 | 0 |
The total Nugent score is calculated as the sum of the scores for each organism group. Total score: 0–3, Normal; 4–6, Intermediate; 7–10, Bacterial vaginosis.