I have never heard of that for pomegranates. This is likely caused by a water problem - not at our house, but the suburb where my in-laws live. Many in the area are ill from different buildings, but all starting around the same time, and they are looking into the cause.
Sick family is worse than being sick yourself in my opinion.
The tests should show the type of bacteria. In our case, it was salmonella. We ate something the day before, bought salads in the store, which were next to raw meat.
In our case, pomegranate peel tea was more effective than antibiotics against this bacteria.