The sexually transmitted diseases are a major threat to the human population as they are caused by microbes and spread during sexual intercourse.
In the given question, the two mentioned sexual disease: bacterial vaginosis and the syphilis are caused by the bacterial species.
Although the disease is caused by the bacteria the species of the disease-causing bacteria differ in these two cases.
The bacterial vaginosis is caused by the <em>Gardnerella vaginalis</em> whereas the syphilis is caused by the <em>Treponema pallidum.
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