Final answer:
The urinary tract can serve as a portal of exit in the infection cycle according to Bonewit-West.
Step-by-step explanation:
According to Bonewit-West, in the cycle of infection, the urinary tract can serve as a portal of exit. Pathogens are adapted to use specific portals of exit to leave one host and potentially infect another. In the urinary tract, secretions such as urine can transport pathogens out of the body, acting as vehicles for these pathogens to exit the host. This makes the urinary tract a significant portal of exit for pathogens, enabling them to be transmitted to new hosts or environments. The identification of different portals of exit, including the urinary tract, is critical in the study of pathogenic transmission and infection control.