mud and germs

[porums]

i watch some training soldiers in movies, they crawl in a swamp, dirty, and needless to say full of germs
Are there any entering his blood stream or his "lower part via the tube" ?

[Moonbear]

That would depend on whether there were any open cuts if they were to enter the blood stream. More likely, skin infections would occur first.

[Andy Resnick]

Bacteria etc. that enter through holes in the head (mouth, nose, ears, etc) or holes elsewhere (ahem...) have to compete with the ginormous number of bacteria already there- bacteria which we coexist with. The blood is sterile, so open cuts are a potential problem.