I'm sorry that happened.
I brought a new yorkie male into my home and he carried some type of bacteria in with him and 3 days later every one of my dogs were deathly ill, vomiting and explosive diarrhea. It was horrible and I was frantic with worry. After vet and meds and tons of cleaning up they all survived. The vet said it was a bacteria that came from the breeders home that her dogs were used to and mine not.