Gram (+) vs Gram (-) Bacterial Structure

Gram-Positive Outer Membrane and Periplasmic Space

Absent Outer Membrane and Periplasmic Space

Gram-Negative Outer Membrane and Periplasmic Space

Present Outer Membrane and Periplasmic Space

Gram-Positive Peptidoglycan Layer

Thick Peptidoglycan Layer

Gram-Negative Peptidoglycan Layer

Thin Peptidoglycan Layer

Gram-Positive Cell Wall Negative Charge Source

Teichoic Acid, Lipoteichoic acid

Gram-Negative Cell Wall Negative Charge Source

Lipopolysaccharide (LPS)

Gram-Positive Flagella Basal Rings

2 Basal Rings

Gram-Negative Flagella Basal Rings

4 Basal Rings

Gram-Positive Resistance to Physical Destruction

Resistant to Physical Destruction

Gram-Negative Resistance to Physical Destruction

Sensitive to Physical Destruction

Gram-Positive Beta-lactam Antibiotic Susceptibility

Sensitive to Beta-lactam Antibiotic

Gram-Negative Beta-lactam Antibiotic Susceptibility

Resistant to Beta-lactam Antibiotic

Gram-Positive Basic Dyes Susceptibility

Sensitive to Basic Dyes

Gram-Negative Basic Dyes Susceptibility

Resistant to Basic Dyes