An increase in reported cases of Listeriosis in Louisiana prompted further investigation. Eight cases of Listeria monocytogenes, serotype 1/2 a sharing the same genetic fingerprint were linked to the recent consumption of sausage and luncheon meat. Three of the patients had eaten hog head cheese (a meat jelly made from swine heads and feet) from two Louisiana grocery stores. It was determined that a single brand of hog head cheese, Veron Foods, was sold. The outbreak strain of Listeria monocytogenes was isolated from a product sample and from environmental samples collected from the meat processing facility. Additional environmental samples showed the presence of other strains of Listeria monocytogenes. In August, Veron Foods recalled hog head cheese and sausage products. At the time, Veron Foods produced 600 pounds of hog head cheese per week. The company's hog head cheese was recalled previously, in 2007, when routine sampling revealed the presence of Listeria monocytogenes.