Discussion
Which property lets an enterovirus reach the intestine alive?
Answer: D
Correct answer: Resistance to pH 3.0 to 5.0
Enteroviruses tolerate the acidity of the stomach and the bile that follows it, so they arrive in the intestine intact and can establish infection there. The property is structural - a capsid that does not disassemble at low pH - and it is what makes faecal-oral transmission possible and defines the genus against the acid-labile rhinoviruses.
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