FDA officials have not yet determined how eggs from two Iowa egg farms became contaminated with salmonella. CNN Radio’s Jim Roope talks with Dr. Nancy Reimers, a poultry veterinarian and “eggs-pert,” about how the hard-shelled orb could become contaminated.
"It’s very rare," said Reimers.
There are three ways an egg could be contaminated. One is if the egg is not properly washed. A second, is through tiny pores in the egg shell.