Agents of gastroenteritis leave in feces, are carried on poorly washed hands to food or water, and enter a new host through the mouth. What is this route called?

1. The portal of entry must give the agent access to tissues where it can multiply. 2. Here the agent exits in feces, rides on hands to a vehicle such as food or water, and enters through the mouth. 3. That exit and entry pattern is named the fecal-oral route, and handwashing is the standard way to break it. 4. Vectorborne transmission needs an insect intermediary, and the placental route crosses from mother to fetus, so neither matches. _Source: CDC Principles of Epidemiology in Public Health Practice, 3rd Edition, section Portal of Entry_