Cattle may serve as a reservoir for E.coli strain O157:H7 because this strain does not cause any disease in cattle.This strain of E.coli can cause a potentially lethal Shiga toxin-mediated hemolytic uremic syndrome (HUS) in humans.Why don't cattle develop HUS?
A) The shiga toxin is not expressed in cattle.
B) E) coli is unable to effectively colonize the bovine intestine.
C) A protease in the cattle destroys the toxin.
D) Bovine kidney cells do not have a shiga toxin receptor.
E) They produce antibody against the shiga toxin.
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