Urinalysis and Body Fluids 6th Edition by Majorie DiLorenzo, Susan Strasinger

Exercise 22

Which of the following organisms produces lactic acid and hydrogen peroxide to maintain an acid vaginal environment?

A. Gardnerella vaginalis

B. Mobiluncus spp.

C. Lactobacilli spp.

D. ?-Hemolytic streptococci

Step 1 of 2

Lactobacilli:

• Bacterial flora are present in vagina

• In vaginal bacteria, the lactobacilli spp occupies the maximum portion

• Lactobacilli bacteria produces lactic acid and maintains pH of vagina in acidic condition (3.8 to 4.5)

• Lactobacilli subgroups produces hydrogen peroxide, which suppresses the increased growth of other organisms

Therefore, “lactobacilli spp” produces hydrogen peroxide and lactic acid to maintain vagina in acidic environment. Hence, the correct answer is option .