After weeks of gradual recalls of products by Blue Bell Creameries, which distributes frozen desserts to about half of the United States, the company is now pulling all of its products off the shelves.

The company said that it was voluntarily recalling all of its products after the bacteria listeria was found in two cartons of ice cream last month.

On Tuesday, the Centers for Disease Control and Prevention (CDC) listed two additional victims that got sick by Listeria linked to products made by Blue Bell.

The agency said that tests indicated Blue Bell products from plants in Texas and Oklahoma were the source of a listeria outbreak that has infected five adults in Kansas, three of whom died.

Three adults in Texas were also sickened in the last four years. The agency also has identified 10 distinct Listeria strains isolated from Blue Bell ice cream products.

The CDC said that genetic tests link Listeria bacteria from two separate Blue Bell factories to at least six cases of listeriosis dating back to 2010.

The case began when South Carolina Department of Health and Environmental Control tested samples of Blue Bell products.

The results showed strains of Listeria, deadly bacteria, which can be present in raw milk, can cause severe infections in children, the elderly, pregnant women and others with weakened immune systems.

The test results were uploaded to a national database and ultimately linked to five cases, including three deaths, at a hospital in Kansas.

In March, Blue Bell began issued a second recall notice after listeria strains were found in products made at its Oklahoma plant. The company’s products include ice cream, frozen yogurt, sherbet and frozen snacks.

Karen Neil, a medical epidemiologist with the CDC’s Division of Foodborne, Waterborne and Environmental Diseases, said, “As new strains are identified out of the Blue Bell products, we will go back to the database and see if there are human matches. You can never predict how big an outbreak is going to be”.