What are Nugent’s criteria for evaluation of bacterial in bacterial vaginosis (BV)?

Updated: Oct 25, 2018
  • Author: Philippe H Girerd, MD; Chief Editor: Michel E Rivlin, MD  more...
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Nugent’s criteria may be used to quantify or grade bacteria via Gram staining of vaginal samples. These criteria evaluate the following 3 types of bacteria and assign scores to each as shown:

  • Lactobacillus (score, 0-4)

  • Bacteroides/Gardnerella (score, 0-4)

  • Mobiluncus (score, 0-2)

Total scores are calculated and interpreted as follows:

  • 0-3: Normal

  • 4-6: Intermediate bacterial count

  • 7-10: BV

See Workup for more detail.

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