Which statement is listed as a primary source of Salmonella?

Which statement is listed as a primary source of Salmonella?

• A. Intestinal tract of people and animals
• B. Water
• C. Soil
• D. Air

Answer: (A)

Salmonella’s main reservoir is the intestinal tract of humans and animals because the bacterium naturally lives and multiplies there and is shed in feces. This makes fecal contamination the primary way it enters foods and the environment, driving most transmission. Water, soil, and air can become contaminated, but they’re more often vehicles or environmental reservoirs rather than the initial source where Salmonella normally resides. Therefore, the statement that the intestinal tract of people and animals is the primary source best captures the pathogen’s usual ecology and transmission pattern.

Salmonella’s main reservoir is the intestinal tract of humans and animals because the bacterium naturally lives and multiplies there and is shed in feces. This makes fecal contamination the primary way it enters foods and the environment, driving most transmission. Water, soil, and air can become contaminated, but they’re more often vehicles or environmental reservoirs rather than the initial source where Salmonella normally resides. Therefore, the statement that the intestinal tract of people and animals is the primary source best captures the pathogen’s usual ecology and transmission pattern.