Different varieties of Staphylococcus aureus bacteria, commonly called “staph,” exist. “Staph infections” are common and a term I remember hearing since I was a child; so this is not something new. Staph bacteria are normally found on the skin and in the nose of about one-third of the population. The bacteria are generally harmless unless they enter the body through a cut or other wound, and even then they usually cause only minor skin problems in healthy people. However, Methicillin-Resistant Staphylococcus Aureus (MRSA) is different. MRSA infections are caused by a strain of staph bacteria that’s become resistant to the antibiotics commonly used to treat ordinary staph infections.
Most MRSA infections occur in people with questionable immune function who have been in hospitals or other healthcare settings, such as nursing homes and dialysis centers. When it occurs in these settings, it’s known as healthcare-associated MRSA (HA-MRSA). HA-MRSA infections typically are associated with invasive procedures or devices, such as surgeries, intravenous tubing or artificial joints.
Another type of MRSA infection occurs in the wider community — among healthy people. This form, community-associated MRSA (CA-MRSA), often begins as a painful skin boil. It’s spread by skin-to-skin contact. At-risk populations include groups such as high school wrestlers, child care workers and people who live in crowded conditions.
Staph skin infections, including MRSA, generally start as small red bumps that resemble pimples or boils. It is not uncommon for the patient to suspect a spider bite. These can quickly turn into deep, painful abscesses that require surgical draining. In most situations, the bacteria remain confined to the skin. But in the case of the HA-MRSA, they can also burrow deep into the body, causing potentially life-threatening infections in bones, joints, surgical wounds, the bloodstream, heart valves and lungs.
MRSA is the result of decades of unnecessary antibiotic use. For years, antibiotics have been prescribed for colds, flu and other viral infections that don’t respond to these drugs. Even when antibiotics are used appropriately, they contribute to the rise of drug-resistant bacteria in part because they don’t destroy every germ they target. In addition, patients who do not take their entire course of antibiotics also play a role in the emergence of these resistant strains. Bacteria live on an evolutionary fast track, so germs that survive treatment with one antibiotic soon learn to resist others.
Because hospital and community strains of MRSA generally occur in different settings, the risk factors for the two strains differ.
Risk factors for HA-MRSA:
- Being hospitalized. MRSA remains a concern in hospitals, where it can attack those most vulnerable — older adults and people with weakened immune systems.
- Having an invasive medical device. Medical tubing — such as intravenous lines or urinary catheters — can provide a pathway for MRSA to travel into your body.
- Residing in a long-term care facility. MRSA is prevalent in nursing homes. Carriers of MRSA have the ability to spread it, even if they’re not sick themselves.
Risk factors for CA-MRSA:
- Participating in contact sports. MRSA can spread easily through cuts and abrasions and skin-to-skin contact.
- Living in crowded or unsanitary conditions. Outbreaks of MRSA have occurred in military training camps, child care centers and jails.
- Men having sex with men. Homosexual men have a higher risk of developing MRSA infections.
When to see a Healthcare Professional:
Keep an eye on minor skin problems — pimples, insect bites, cuts and scrapes — especially in children. If wounds become infected, seek medical care. Do not attempt to treat an MRSA infection yourself. You could worsen it or spread it to others.
What You Can Do:
Create a list that includes:
- Detailed descriptions of your symptoms
- Information about medical problems you’ve had
- Information about the medical problems of your parents or siblings
- All the medications and dietary supplements you take
- Questions you want to ask the doctor
What to Expect During Your Visit:
During your physical exam, your doctor will closely examine any skin lesions you may have. He or she might take a sample of tissue or liquid from the lesions for testing.
Both healthcare-associated and community-associated strains of MRSA still respond to certain antibiotics. In some cases, antibiotics may not be necessary. For example, your doctor, NP or PA may choose to drain a superficial abscess caused by MRSA rather than treat the infection with drugs.
In the hospital, people who are infected or colonized with MRSA often are placed in isolation as a precaution to prevent the spread of MRSA. Visitors and healthcare workers caring for people in isolation may be required to wear protective garments and must follow strict hand hygiene procedures. Contaminated surfaces and laundry items should be properly disinfected.
Wash your hands. Careful hand-washing remains your best defense against germs. Scrub hands briskly for at least 15 seconds, then dry them with a disposable towel and use another towel to turn off the faucet. Carry a small bottle of hand sanitizer for times when you don’t have access to soap and water.
Keep wounds covered. Keep cuts and abrasions clean and covered with sterile, dry bandages until they heal. The pus from infected sores may contain MRSA, and keeping wounds covered will help keep the bacteria from spreading.
Keep personal items personal. Avoid sharing personal items such as towels, sheets, razors, clothing and athletic equipment. MRSA spreads on contaminated objects as well as through direct contact.
Shower after athletic games or practices. Shower immediately after each game or practice. Use soap and water. Don’t share towels.
Sanitize linens. If you have a cut or sore, wash towels and bed linens in a washing machine set to the hottest water setting (with added bleach, if possible) and dry them in a hot dryer. Wash gym and athletic clothes after each wearing.
Most patients have come to know and often fear the term MRSA. However, when these infections are encountered the general community, in patients who are otherwise healthy, there is little to fear. Your healthcare provider will know exactly how to manage your condition and you are sure to recover without complication. Even so, it is still good behavior to practice the sound preventive measures we discussed above.