Jagd:
It is said you never see or hear the bullet that gets you.
This would seem even more true with pathogens, chemicals, and other nasties that do not make their presence known with colors, consistency, or turpidity.
Unless you are willing to take a chance at spewing vital fluids and neutrients from both ends of your body, it is best to error on the side of caution.
Bountyhunter