From a Press Release from the AVMA:

The American Veterinary Medical Association (AVMA) has recently been made aware of several complaints from pet owners and veterinarians that multiple brands of jerky treats manufactured in China have been making pets sick. Symptoms of illness have included vomiting, diarrhea, and lethargy. To our knowledge, no deaths have been reported.

In addition, the American College of Veterinary Internal Medicine (ACVIM) has also issued a statement reporting that it has become aware of the dogs presenting similar symptoms associated with consumption of some jerky treats.