MRSA
Methicillin-Resistant Staphylococcus aureus
MER · sah
A type of staph bacteria that has become resistant to many common antibiotics. Regular staph often lives harmlessly on the skin or in the nose, but MRSA can cause infections that are harder to treat, and sometimes serious.
What is MRSA?
MRSA is a type of Staphylococcus aureus bacteria that has developed resistance to many commonly used antibiotics, including methicillin, penicillin, and amoxicillin.
Regular staph bacteria often live harmlessly on the skin or in the nose, and people can carry MRSA the same way without any symptoms. But when MRSA does cause an infection, it can be harder to treat and, in some cases, life-threatening.
Symptoms to watch for
MRSA most often causes skin infections, but it can also spread deeper into the body. Signs may include:
- Red, swollen, painful bumps or boils
- Warmth at the infection site
- Pus or other drainage
- Fever or chills
- More serious infections: pneumonia, bloodstream infections (sepsis), or surgical site infections
Who is at higher risk?
MRSA can affect anyone, but some people are at higher risk:
- Hospitalized patients or residents of long-term care facilities
- People with weakened immune systems
- People with invasive devices (catheters, IV lines) or surgical wounds
- Athletes and gym-goers (skin-to-skin contact, shared equipment)
- People living in crowded settings (dorms, barracks, shelters)
How does it spread?
MRSA spreads mainly through direct contact:
- Skin-to-skin contact with someone who has MRSA
- Touching contaminated surfaces or shared items (towels, razors, gym gear)
- Healthcare environments where invasive procedures and close contact raise the risk
Everyday hygiene keeps MRSA in check
Good hygiene and simple habits go a long way toward stopping MRSA from spreading:
- Wash your hands regularly with soap and water or an alcohol-based sanitizer
- Keep cuts and scrapes clean and covered until they heal
- Do not share personal items like razors, towels, or athletic equipment
- Clean and disinfect frequently touched surfaces, especially in gyms and healthcare settings
Why precautions are necessary
MRSA spreads easily by contact, and staff and visitors can carry it to patients who are already vulnerable, especially those with wounds, surgical sites, or invasive devices. Extra care keeps it from spreading.
Contact precautions may include
- A private room, or grouping with other patients who have MRSA
- Gloves and gowns for care activities
- Hand hygiene before and after every contact
- Keeping wounds clean and covered
For patients
- You may be screened and placed on contact precautions for MRSA
- Keep any wounds clean and covered, and clean your hands often
- Follow your care team's instructions on hygiene and precautions
For visitors
- Clean your hands before and after visiting
- Follow posted precautions, including PPE if required
- Do not touch the patient's wounds, dressings, or devices
- Avoid visiting if you have an open skin infection
Cleaning matters
- High-touch surfaces are cleaned and disinfected frequently
- Shared equipment is cleaned between uses
- In gyms and shared spaces, wipe down equipment and do not share towels or razors
Common ways MRSA travels:
Treatment
MRSA does not respond to many standard antibiotics, but it can still be treated:
- Targeted antibiotics such as vancomycin, clindamycin, or doxycycline
- Drainage of abscesses or boils by a healthcare provider
- IV antibiotics and hospitalization for severe cases
- Isolation protocols in healthcare settings to protect other patients
When to seek care
See a healthcare provider if you have:
- A skin infection that is getting worse or is not healing
- A boil or abscess with pus
- Spreading redness, warmth, or swelling
- A fever or chills along with a skin infection
Keeping MRSA from spreading
Cover wounds
Keep cuts and infected areas clean and covered with a dry bandage until they heal.
Do not share
Do not share razors, towels, bedding, or athletic equipment with others in the home.
Wash and launder
Wash your hands often, and launder towels, sheets, and clothing regularly, drying them fully.
Keep surfaces clean
Clean frequently touched surfaces at home, and finish any antibiotics exactly as prescribed.
MRSA in one breath
MRSA is a superbug that resists many antibiotics but is still treatable. Skin infections are the most common sign, but serious illness can occur. Prevention matters: handwashing, covering wounds, and not sharing personal items go a long way toward keeping it from spreading.
Did it stick?
Eight quick questions on what you just read. Anything you miss, we go over again at the end.