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Behravesh said the hatchery has taken steps to curb the spread of salmonella _ including replacing equipment, adopting new egg-cleaning procedures and vaccinating chickens _ and is not considered a health threat. She said she was not aware of any fines or penalties against the business over the outbreak.

During the eight years studied, the annual number of illnesses linked to the hatchery ranged as high as 84, with 29 cases last year and only one so far in 2012.