They are known to carry viruses of the H5 and H7 subtypes, but usually in the low pathogenic form.

据知，它们携带H5和H7亚型病毒，但通常是低致病性的。

youdao

To date, most human cases of avian influenza have been caused by viruses of the H5 and H7 subtypes.

到目前为止，大多数禽流感人间病例是由H5和H7亚型病毒造成。

youdao

Only viruses of the H5 and H7 subtypes are known to cause the highly pathogenic form of the disease.

据知，只有H5和H7亚型病毒可引起高致病性禽流感。

youdao

Many cows are already fed bacteria much like those in yogurt that reduce the amount of O157:H7 in manure.

FORBES: Magazine Article

Another approach is to try to displace O157:H7 in farm animals, whose manure can be spread to nearby farmland.

FORBES: Don't Eat Your Spinach

The offender in this case is the toxic O157:H7 strain of Escherichia coli.

FORBES: Magazine Article