Family Nurse Practitioner Exam

Erysipelas is commonly caused by which type of organism?

1. Streptococci

2. Staphylococci

3. Gram-negative bacteria

4. Fungi

The correct answer is: Streptococci

Erysipelas is primarily caused by Streptococci, particularly Streptococcus pyogenes, which is a group A beta-hemolytic streptococcus. This organism is known for its ability to penetrate the skin through cuts or abrasions, leading to the characteristic acute inflammation, swelling, and redness associated with the condition. The clinical presentation often includes well-defined borders of raised erythema, and the skin can feel warm and tender to the touch. The systemic response might also include fever and malaise. While Staphylococci are implicated in other skin infections and can sometimes co-infect with streptococci, they are not the primary cause of erysipelas. Gram-negative bacteria and fungi primarily cause different types of infections, such as cellulitis or dermatophytosis, and do not typically lead to the classic presentation of erysipelas. Understanding the specific pathogens associated with various skin infections is crucial for targeted treatment options and effective clinical management.