The Nugent score, can be used by microbiologists to assess bacterial vaginosis.  Assesses large Gram-positive rods (Lactobacillus), small Gram-variable rods (Gardnerella vaginalis) and curved Gram-variable rods (Mobiluncus) are scored and total score can range from 0 to 10. A score of 7 to 10 is consistent with bacterial vaginosis.