Uh, nasty little bug. -Exactly. So, our agent is E-coli. The reservoir is our own GI tract, the Portal of Exit. -I get it.

• 嗯，讨厌的小病菌。-是这样。所以，我们的病原体是大肠杆菌。储源是人体的胃肠道以及出口。-我明白了。