The Centers for Disease Control and Prevention said on Friday that 48 additional cases of Salmonella illnesses since July 3 tied to pig ear dog treats.

Overall, the number of reported Salmonella cases has increased to 93.

The CDC's previous July advisory has led to some products being pulled from shelves, and a recall. On July 3, Pet Supplies Plus announced a recall of its pig eat dog treats.

But the recall has done little to tamper the spread Salmonella illnesses.

Of the 93 people sickened, 20 were hospitalized. Of those interviewed, 69 percent reported contact with pig ear dog treats or with dogs who were fed pig ear dog treats. The survey also found that 90 percent had contact with a dog.

The CDC offers the following advice: