1.   But the scientists also will consider whether additional wheat fields should be quarantined and destroyed to contain the spores.

2.   Four hundred and fifty monkeys were destroyed to contain that outbreak.

3.   But it spreads so quickly that entire herds and flocks must be destroyed to contain it.

4.   Foot-and-mouth disease is not harmful to humans, but it spreads so quickly that entire herds and flocks must be destroyed to contain it.