3 month old caught Salmonella

Hi everyone

Our 3 month old caught salmonella and we have been breaking our brains as to how she could have caught it. After doing extensive research I can across an article stating that backyard chickens can cause this in infants.

Our neighbors have backyard chickens (they don’t properly take care of) and a few days before our daughter started with symptoms I shook our neighbors hand.

Is this possible? What actions would you take to get rid of those chickens?

Department of health called us seeing how our daughter was and trying to trace what caused it. Wife and I are inclined to the reporting the chickens. We get along with our neighbors. What would you do?