Food Spoilage Bacteria - Lactobacillus
Different organisms of this group, also known as "lactic acid bacteria", have different properties but all of them produce lactic acid from carbohydrates. The important species include Lactobacillus plantarum, Pediococcus cerevisiae, Leuconostoc mesenteroides, Streptococcus faecalis and Lactobacillus brevis. These bacteria cause "lactic souring" and spoil wines, which can be easily prevented by maintaining a sulphur dioxide concentration of 0.007 per cent in wine.