What is the main cause of cellulitis?

The main cause of cellulitis is typically a bacterial infection, and one of the most common bacteria responsible for this condition is MRSA (Methicillin-Resistant Staphylococcus Aureus). Cellulitis occurs when bacteria enter through a break in the skin, leading to inflammation and infections in the underlying tissues. MRSA is particularly noteworthy due to its resistance to many antibiotics, which can make cellulitis infections caused by this organism more severe and difficult to treat.

While other infections, including viral and fungal, can lead to various skin conditions, they are generally not the primary causes of cellulitis. Additionally, insect bites can be a source of entry for bacteria but are not recognized as a direct cause of cellulitis on their own. Therefore, MRSA stands out as a significant contributing factor in the development of cellulitis, making it the correct answer in this context. Understanding the risks associated with MRSA and its prevalence in skin infections is crucial for proper diagnosis and treatment.