Microbiology Which one of the following gram positive organism is most common cause of UTI among sexually active women? A Staphylococcus epidermidis B Staphylococcus aureus C Staphylococcus saprophyticus D Enterococcus 💡 Explanation Which one of the following gram positive organism is most common cause of UTI among sexually active women? ✓ Correct Answer: C. Staphylococcus saprophyticus