Reading this thread, I'm kinda glad Gologit didn't come up with the (in)famous "Dr. Bob's Diesel Cure".
I wouldn't sweat the issue, though, laddie's about to get his share of dirt for sure, crawling with his claws and teeth on the hills.
Well, I made a note anyway, since it's not unusual to me to have serious bad gut days in the bush. Thanks for the tip. Alcohol related, to be honest. Hunting weekend with the buddies equals 1 crappy day. Wedding or other clan reunion - 2 days. "Biznes" trip to Russia - 3 days.
No drinking out of the creeks, as Slowp wrote. I have been drinking natural waters all my life, just once there happened to be a large carcass upstream. I did catch a bacteria, which drilled holes on my guts. I was bleeding inside, my Hgb was 103 (normally over 160), when I finally got to a doctor. It took 3 heavy antibiotic cures to get rid off the bugger.