Firmicutes

• mostly composed of gram-positive bacteria
• know as low-GC gram-positive bacteria
• include the lactobacillales that produce lactic acid
• include both nonsporulating and sporulating bacteria- Bacillales and Clostridiales
• Bacillales microorganisms are obligate or facultative organisms
• Clostridiales microorganisms are anaerobic
• cells are either round or rod-like