Cause of Ludwig angina is?
**Core Concept**
Ludwig's angina is a severe infection of the submandibular space, characterized by rapidly spreading cellulitis and potential airway compromise. It is often caused by bacterial invasion of the tissues in the neck, leading to severe inflammation and edema.
**Why the Correct Answer is Right**
The correct answer is an infection caused by Fusobacterium necrophorum, a type of gram-negative anaerobic bacteria. This bacterium is commonly found in the oral cavity and can cause severe infections, particularly in individuals with poor oral hygiene or compromised immune systems. The infection spreads rapidly through the submandibular space, leading to the characteristic signs and symptoms of Ludwig's angina, including severe pain, swelling, and difficulty swallowing.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because while Streptococcus species can cause infections in the head and neck region, they are not the primary cause of Ludwig's angina.
* **Option B:** This option is incorrect because Eikenella corrodens is a type of gram-negative bacterium that can cause infections in the oral cavity, but it is not typically associated with Ludwig's angina.
* **Option C:** This option is incorrect because Staphylococcus aureus is a type of gram-positive bacterium that can cause a variety of infections, but it is not the primary cause of Ludwig's angina.
**Clinical Pearl / High-Yield Fact**
Ludwig's angina is a medical emergency that requires prompt recognition and treatment to prevent airway compromise and other serious complications. A high index of suspicion is essential, particularly in individuals with a history of poor oral hygiene or recent dental procedures.
**Correct Answer: D. Fusobacterium necrophorum is the most common cause of Ludwig's angina.**