The Americans had been warned by the government that they did not kiss or swing their hedgehogs after a salmonella explosion linked to the small mammals.
The explosion affected 11 people in eight states this week, 10 of whom had just been in contact with a hedgehog, according to the Center for Illness Control.
Three people in Missouri contracted the infection, as well as two in Minnesota.
One case was reported in Wyoming, Colorado, Nevada, Texas, Mississippi and Maine, according to the CDC.
The supplier of the hedgehogs that cause the explosion was not identified, the agency said.
In response to the infections, the CDC gave advice on how to be safe around hedgehogs, including "did not kiss, snuggle, or keep small pets near your face."