Microbes

• Types of Microbes
• Types of Bacteria – Shape, Gram +/-, Aerobes/Anaerobes
• Types of Antibiotics

Gram-negative bacteria are surrounded by a thin peptidoglycan cell wall, which itself is surrounded by an outer membrane containing lipopolysaccharide. Gram-positive bacteria lack an outer membrane but are surrounded by layers of peptidoglycan many times thicker than is found in the Gram-negatives.