Certificate in Public Health Inspection (CIPHI) BOC Practice Test 2026 - Free Public Health Inspection Practice Questions and Study Guide

Shigellosis is spread mainly through the fecal-oral route, so the bacterium is not something that is normally found in foods on its own. The best statement reflects how contamination happens: Shigella is not naturally present on foods, but can contaminate foods through cross-contamination during handling or from exposure to polluted water. Because the infectious dose is very low, even a tiny amount of contamination from an infected handler or from contaminated water can cause illness, which is why hygiene and water quality are central to prevention.

While dried fruits, raw fish, or spices can become contaminated if mishandled or processed with contaminated equipment or water, they are not inherent carriers of Shigella in the way that the mechanism described above explains. The key concept is that transmission hinges on contamination from human contact or contaminated water, not that a particular food type naturally harbors Shigella.