Final answer:
The bacterium most commonly responsible for impetigo is Staphylococcus aureus. This highly contagious skin infection is characterized by blisters and sores, particularly around the mouth, and is treatable with antibiotics.
Step-by-step explanation:
The bacterium commonly responsible for impetigo is Staphylococcus aureus (Option E). Impetigo is a contagious skin infection that can lead to the formation of vesicles, pustules, or bullae, particularly around the nose and mouth. It can be caused by S. aureus alone, by Streptococcus pyogenes alone, or by a co-infection of both S. aureus and S. pyogenes.
Typical treatment includes topical or oral antibiotics. It is important to treat impetigo promptly as infections caused by S. pyogenes can lead to acute glomerulonephritis, a severe inflammatory condition. Good hygiene and avoiding sharing towels or clothing can help prevent the spread of impetigo.