Gram-negative

Gram staining is a method of staining bacteria to add colouration and facilitate visualisation under a microscope.

 

Known Gram-negative species

• All Chlamydiae species  
• Chlamydia trachomatis
• Chlamydophila pneumoniae
• Chlamydophila psittaci
• All Proteobacteria species  
• All Spirochaetes species  
• Brachyspira pilosicoli
• Brachyspira aalborgi
• Leptospira species
• Borrelia burgdorferi
• Borrelia recurrentis
• Treponema pallidum pallidum
• Treponema pallidum endemicum
• Treponema pallidum pertenue infection