18.1 Nonsporulating Firmicutes Lactic Acid Bacteria乳酸菌 Streptococcus链球菌 ·Homofermentative同型发酵 Play important roles in production of buttermilk,silage, and other products Some species are pathogenic Lactococcus:genera of dairy significance乳球菌属 Enterococcus:genera of fecal origin肠球菌属 (a) (b) 2012 Pearson Education,Inc.Chen Feng, Microbiology, SJTU – Streptococcus 链球菌 • Homofermentative 同型发酵 • Play important roles in production of buttermilk, silage, and other products • Some species are pathogenic – Lactococcus: genera of dairy significance 乳球菌属 – Enterococcus: genera of fecal origin 肠球菌属 Lactic Acid Bacteria 乳酸菌 18.1 Nonsporulating Firmicutes