I will only talk about what I know, ie. what people do in medical school and residency admissions.
First, there are no CV requirements, it is a non-standardized document. Formatting varies and how things are included follows a general formula, but far from consistent.
In my experience, students and residents will have a Publications section, Presentation, and an Abstract section. Sometimes the presentation/abstract sections are combined into one. Anything that your name is on that you did not present yourself would go in the abstract section. Up until a year or so ago, mine had 3 sections. But, after a while it becomes too unwieldy and frankly, while I could keep track of all the random stuff my name ends up on, there is no point based on where I am at right now career wise, so I dropped it off.
I hate the term "counts" when it comes to any of this. None of this is a checkbox, requirement or anything like that. It is about building context for whatever you are submitting it to. What is appropriate simply depends on what you are applying for.