This is likely cognate to the popular Welsh girls' name Carys. The name is also that of an island in the Inner Hebrides island group, Scotland; Cara Island lying just off the southern tip of the Isle of Gigha. In Turkey the word Kara means dark, which may or may not be related to the Gaelic Ciara of the same meaning.
MRSA boils are a physical symptom that manifests in the presence of methicillin-resistant Staphylococcus aureus (MRSA) infection. Considered a form of dermal staph infection, MRSA boils present as progressive skin sores that form a boil of contained infection, which without proper treatment can lead to abscess formation.
It's tougher to treat than most strains of staphylococcus aureus -- or staph -- because it's resistant to some commonly used antibiotics. The symptoms of MRSA depend on where you're infected. Most often, it causes mild infections on the skin, like sores or boils. But it can also cause more serious skin infections or infect surgical wounds, the bloodstream, the lungs, or the urinary tract. Though most MRSA infections aren't serious, some can be life-threatening.