Gram-positive Bacteria

Gram-positive endospore-forming rods

Gram-positive bacteria retain the crystal violet stain when treated by Gram's method. Gram-positive endospore-forming rods are rod-shaped bacteria that form endospores. Representative genera include Bacillus and Clostridium. They include:

• Bacillaceae
• Clostridium
• Micromonosporaceae
• Paenibacillus
• Saccharopolyspora
• Staphylococcaceae
• Streptomycetaceae
• Thermoactinomyces

Gram-positive asporogenous rods, regular

Gram-positive asporogenous rods, regular, are a group of regular rod-shaped bacteria that stain gram-positive and do not produce endospores. They include:

• Erysipelothrix
• Lactobacillaceae
• Listeria
• Mycobacteriaceae

Gram-Positive Asporogenous Rods, Irregular

Gram-positive asporogenous rods, irregular, are a group of irregular rod-shaped bacteria that stain gram-positive and do not produce endospores. They include:

• Acetobacterium
• Actinobacteria
• Butyrivibrio
• Corynebacterium
• Eubacterium
• Propionibacteriaceae
• Thermoanaerobacter