What is NOT TRUE regarding vaginal candidiasis?

In which of the following populations is vaginal candidiasis more common?

A patient is most likely to develop a vaginal yeast infection after taking which one of the following drugs?:-

What is not a characteristic of candidiasis?:-

A patient with diabetes has been diagnosed with a vaginal infection for which she is to use nystatin pessaries.
Which of the following should be included in the instructions to this patient?