Among 24 people interviewed by the CDC, all reported coming into contact with a puppy - and 15 said the puppy was from a pet store.
"Epidemiologic and laboratory evidence indicate that puppies purchased from pet stores are the likely source of this outbreak". The CDC also reported that a majority of those infected individuals had visited the national pet store chain named Petland.
That outbreak, which infected 113 people in 17 states and caused 23 hospitalizations, was declared over in January 2018.
The CDC recommends washing your hands after touching dogs, cleaning up after them or handling their food - as well as taking new pups to the vet for a check-up.
Unfortunately, this specific strain of bacteria is apparently resistant to the most common "first-line" antibiotic treatments.
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Campylobacter infections have affected more than 1.5 million individuals every year but most cases go unreported or undiagnosed.
They also advise to supervise children around dogs and to not let the animals lick your mouth, face, open wounds or any area with broken skin.
"The CDC did not have any direct recommendations regarding steps to keep puppies from exposure to this bacterium and recommended that Petland seek assistance from animal health officials", mentioned Petland.
Petland released a statement on Monday said this specific strain did originate at a specific Petland store.
At least five of those infected were Petland employees, according to the CDC.
The Centers for Disease Control and Prevention are investigating puppies at pet stores as their likely suspect in an outbreak in several states.