MSSA Infections – What You Need to Know

You've probably heard of MRSA, but MSSA (methicillin‑sensitive Staphylococcus aureus) is just as common. It’s a type of staph bacteria that still responds to standard antibiotics, making it easier to treat if caught early.

Symptoms and Diagnosis

MSSA usually shows up as red, painful bumps on the skin—think boils or impetigo. You might also get cellulitis, a spreading rash that feels hot and tender. If the infection gets into deeper tissue, it can cause abscesses that need to be drained.

Doctors diagnose MSSA by taking a swab of the sore and sending it to a lab. The test tells them which antibiotics will work best, so you don’t waste time on medicines that won’t help.

Treatment and Prevention

Because MSSA is sensitive to many drugs, doctors often start with oral options like dicloxacillin or cephalexin. For severe cases, they might give IV antibiotics such as cefazolin. Finish the full course—even if you feel better—to stop the bacteria from coming back.

Keeping skin clean and covered is the simplest prevention trick. Wash hands often, don’t share towels, and treat any cuts with antiseptic right away. If you work in a gym or healthcare setting, wearing gloves and disinfecting equipment can cut down on spread.

If you notice a painful lump that’s getting bigger, warm, or draining pus, see a doctor fast. Early treatment means less chance of complications like bloodstream infection, which is far more serious.

Even though MSSA isn’t as scary as MRSA, it can still cause real trouble if ignored. Knowing the signs and acting quickly keeps you healthy and stops the bug from moving to others.

Got questions about a stubborn skin sore? Chat with your pharmacist or doctor—most will ask for that lab result to pick the right antibiotic. And remember: proper wound care is half the battle.