E. coli strains toxic to humans live in the intestine of ____ without sickening them. I.
Birds and frogs
II.
Goats and sheep
III.
Cattle and deer
A) I only
B) I and II
C) II and III
D) I and III
E) I, II, and III

Question

Quizplus · Accepted Answer

Cattle and deer, along with other ruminants, can carry E. coli strains that are toxic to humans without showing signs of illness themselves. This is because these strains, including the well-known O157:H7, can colonize the intestines of these animals without causing disease in them, but can be very harmful if transmitted to humans, often through contaminated food or water.

E Coli Strains Toxic to Humans Live in the Intestine