An infection carried by dogs has recently infected 39 people, at least one of whom lives in Missouri — and the outbreak can likely be traced back to a pet store chain with a presence in the St. Louis area.That's according to the Centers for Disease Control and Prevention, which reported the outbreak on Monday and is investigating the situation along with the Ohio Department of Health and the U.S. Department of Agriculture Animal and Plant Health Inspection Service.
The infection, known as Campylobacter, has hit seven states.…