A dog's stool can harbor E.coli and pass it on to humans. It has been suspected that water has been contaminated with E.coli from dogs from water runoff.
Yes, you will have to bring a fresh sample of the dogs stool for your vet for testing but if it is a concern your vet can test for it using the stool. If not, urine works as well. Though again, has to be fresh.
You can take a sample in to the vet and have them test for it. Other wise there is no way of knowing and there are no do it at home kits for those things. But you need to call your vet and ask them if they would run a test on it for you if you bring a sample.
Yes. E. coli is a normal bacteria found in stools and a dog's feces are no exception. Dogs however have a much more powerful digestive system and can kill E. coli in their stomach.
E. coli can be found in a dog's stool. If a dog is having diarrhea, E. coli could be the cause. If e. coli is found in a dog's stool, it means that e. coli is in the dog's system and it can be serious. Take the dog to the vet to get checked out.
Yes E.coli can be found in most feces. If your dog is fed raw meats this is especially true. It is always a good idea to wash your hands after being around your pets.