Sixteen isolates of S. thermophilus did not produce histamine in HDB. Most of the S. thermophilus isolates formed low amounts of histamine (1–50 mg/L) from histidine whilst one isolate was a prolific amine producer, with amine production above 36.33 mg/L (Fig. 1). Landete, de Las Rivas, Marcobal, and Munoz (2007) found that Oenococcus oeni, Lb. hilgardii, Lactobacillus mali, Le.