I just took the Path shelf a few hours ago, I wouldn't say micro was 45% of it, though there was quite a bit. If I could go back and study again I would focus more on STDs than general micro. There were no questions on worms, malaria, but more than a couple dealing with lesions on private parts, and what biopsies of the lesions would show. Other than that the micro was pretty basic. (pseudomembrane on the back of the throat of a 8 yr old girl, a group of people got bloody diarrhea after drinking out of a fountain contaminated with sewage) the STD stuff was tricky, though so know it well.
More than micro I wish I had gone over immuno better. There were detailed questions on complement, T/B cell activation, and the like that you will not be able to figure out unless you know it cold.
Another area I got tripped up on was derm stuff. I was kinda pissed cuz my school loves vasculitides and (glomerulonephritides?) which I studied up on and there wasn't a whole lot on there. There was a q? or two where you had to know crescentic, focal segmental etc.