The Centres for Disease Control says 158 people got sick from bacteria spread by mail-order chicks from a hatchery in Ohio.
Although nobody died, 29 required hospital treatment. Sixty-five of them were children younger than 10.
On average, symptoms showed up three weeks after the mail-order chicks arrived. Some were ducklings.
The report that has just come out describes details of the situation that developed between March and October of last year and involved cases from 30 states.