Small warning: This question comes from a germophobe point of view, so please keep this in mind while giving an answer.
I love hiking, but I'm worried of what kind of germs (read virus, bacteria and any parasite) you could get from touching things in the ground. The list of things are normal, natural objects like stones, sticks, leaves (dry or not), etc. My particular worry are rodent-transmitted illnesses like leptospirosis and hantavirus, since these transmit through the urine and feces of rats, and I don't know if the objects I get from the ground are contaminated or were at some point exposed to contamination. In addition, it has to be considered that hands or skin touching the objects might be cut, the hands might touch mouth, nose, eyes or ears, and also what happens if one eats afterwards.
For additional context, when I say hiking, I mean hiking in USA Northeastern forests, in public state parks, on one of the trails (not outside the trails). My hikes are not particularly long, certainly not more than a few hours and do not involve the use of shelters or public bathrooms.
My question is, what are the chances that a human can get sick of any rodent-transmitted illness by touching natural objects while hiking?