Salmonella enteritidis causes a food-borne illness that kills 400 to 600 Americans each year. It is found mainly in poultry products. Rather than give large doses of antibiotics to poultry, some poultry producers infect the intestinal tract of hens with a harmless bacteria, resulting in a dramatic decrease of S. enteritidis found in the chickens. In this case, the producers have used the principle of
A) mutualism.
B) predation.
C) competitive exclusion.
D) parasitism.

Question

Quizplus · Accepted Answer

The producers have used the principle of competitive exclusion, in which they introduced a harmless bacteria into the hens' intestinal tract, which outcompeted and decreased the presence of the harmful bacteria, S. enteritidis.

Salmonella Enteritidis Causes a Food-Borne Illness That Kills 400 to 600