Indirect Discourse, Discussions.
After indirect discourse, do not use quotation marks.
Example: The nurse said he would be discharged today.
Do not use quotation marks with yes or no.
Example: His answer to the question was no.
In interview or discussion formats when the name of the speaker is set off, do not use quotation marks.
Example:
Dr Black: Now let us review the slides of the bone marrow biopsy.
Dr Smith: The first slide reveals complete absence of granulocytic pre-cursors.