After oral antibiotic therapy, which type of microbe could likely cause vaginitis?

• A. Bacteria
• B. Virus
• C. Fungus
• D. Protozoa

Answer: (C)

Antibiotic therapy, particularly when taken orally, can disrupt the natural balance of bacteria in the body, including the vaginal flora. This disturbance often leads to an overgrowth of certain types of fungi, notably Candida species, which are commonly associated with vaginitis. The antibiotics eliminate many of the protective bacterial populations, allowing the fungi to proliferate more easily.

In contrast, bacterial vaginosis and infections caused by viruses or protozoa do not typically arise as a direct consequence of antibiotic treatment. While these organisms can cause similar symptoms, they are not primarily linked to the disruption of the vaginal microbiome caused by antibiotics. Thus, the likelihood of developing vaginitis from a fungus, particularly after a course of antibiotics, is significantly higher than from the other types of microbes listed.