Gram-positive bacilli
When gram-positive bacteria are shaped like rods, they're known as bacilli. Most of these bacteria are typically found on the skin, but some can cause serious medical conditions.
Are bacilli gram-positive?
Bacillus species are rod-shaped, endospore-forming aerobic or facultatively anaerobic, Gram-positive bacteria; in some species cultures may turn Gram-negative with age.
Can gram-negative bacteria be bacilli?
Gram-negative bacilli are responsible for numerous diseases. Some are commensal organisms present among normal intestinal flora. These commensal organisms plus others from animal or environmental reservoirs may cause disease.