I do not read every single pub listed on applications for traditional MD programs.
However ... if a specific pub title that is published in a reputable peer-reviewed journal catches my interest, I might check it out - especially if the pub is in my specialty AND the applicant has made a point to discuss a uniquely meaningful issue related to the pub in their personal statement.
This is completely dependent on each adcom member. I will search up the paper and very briefly skim the abstract as quality control.. There have been a few times where applicants made it seem like they co-authored an original research manuscript (e.g "my research culminated in a co-first author publication that studied the effect of [X] on [Y], PMID: XXXXXXX), when in reality their 'publication' is actually a 1/2 page editorial or comment piece talking about someone else's manuscript with a few lines detailing their own lab's research. I also recall a case where an applicant was just acknowledged in a manuscript but misrepresented this as an authorship. Not a good look when applicants are caught upselling an accomplishment.
Vanity journals. They may very well be peer reviewed, but the whole idea behind them is that you pay to publish them. People use these to fluff up thier CVs.
if you look for thier editorial offices using Google maps, they're usually someone's garage (if in the US). There are tons of them in India and China.
We PIs get solicitations from these all the time.
These are different from eJournals like the PLOS family, which are reputable journals.