Final answer:
Lactobacillus is the bacterium found in the genitourinary tracts of women producing estrogen.
Step-by-step explanation:
The bacterium found as the predominant species in the genitourinary tracts of women who are producing estrogen is Lactobacillus. Lactobacillus is the bacterium found in the genitourinary tracts of women producing estrogen. For the majority of women, the lactic-acid-producing bacteria in the vagina are dominated by various species of Lactobacillus, which play an important role in maintaining a healthy environment and defending against infections.
Lactobacillus is the bacterium found in the genitourinary tracts of women producing estrogen. The production of lactic acid, regulated by estrogen, creates an acidic environment within the vagina that serves as a defense mechanism.