Is it a health hazard of a dog to be in a dentist office?

Someone had heard a comment about this office of a dentist who never return to their once because he had a dog that someone jumped and made a mess on the floor to make it or not, if it was another dog patients or for someone who works in a dentist's office?

yes … dogs are discusting …. why do you think that pets arent allowed in restaurants to imagine a place clean mouth

Office of Environmental Health Hazard Assessment (OEHHA)