Which of the following is a sign of MRSA infection?

Draining pus is a classic sign of a MRSA (Methicillin-resistant Staphylococcus aureus) infection. MRSA is a type of staph bacteria that is resistant to many antibiotics, making it a common cause of skin infections. These infections often present as swollen, red bumps on the skin that can fill with pus and may resemble spider bites. The presence of draining pus indicates that the infection is active and potentially spreading, which is characteristic of MRSA infections, especially in skin or soft tissue areas.

In contrast, the other symptoms listed, such as coughing blood, weight loss, and persistent chest pain, may indicate more complex systemic issues or different types of infections and are not directly indicative of a MRSA infection. While MRSA can cause severe infections, its hallmark signs typically include localized skin symptoms like draining pus. Understanding the signs associated with specific infections is crucial for proper identification and treatment.