What Are VRE? Symptoms, Causes, Diagnosis, Treatment, and Prevention

Medically Reviewed

VRE stands for vancomycin-resistant enterococci.

Enterococci are bacteria that normally live in the intestines and in the female genital tract, and are also present in soil and water. Most of the time, these germs don’t cause any harm, but if they get into certain places in the body, such as the urinary tract, bloodstream, or a wound, they can cause an infection.

Vancomycin is an antibiotic that is commonly used to treat these infections, but as with a number of other bacteria that have developed antibiotic resistance — the ability of certain germs to fight off the drugs that have been formulated to kill them — enterococci has learned to adapt and prevail against the drug. These hard-to-kill bacteria are called vancomycin-resistant enterococci (VRE).

VRE infections can be difficult to treat because there are fewer antibiotics that can fight this resistant bacteria. In fact, VRE is listed as one of the key antibiotic-resistant pathogens that pose a threat to human health, according to the Centers for Disease Control and Prevention (CDC). The CDC classifies 18 antibiotic-resistant germs into three categories: urgent, serious, and concerning. VRE, which was estimated to have caused 54,500 infections among hospitalized patients and led to the deaths of 5,400 people, is listed in the “serious” category.

Signs and Symptoms of VRE

Enterococcus infections, including VRE infections, cause a range of different symptoms depending on the location of the infection.

VRE can infect the bloodstream, the urinary tract (as a UTI), and wounds associated with surgery.

Bloodstream infections can cause:

  • Fever
  • Chills
  • Body aches
  • Rapid pulse and breathing
  • Nausea and vomiting
  • Diarrhea
  • Decreased urination

Wound infections can cause:

  • Soreness and swelling at wound site
  • Red, warm skin around wound
  • Pus or fluid leakage from the wound

Causes and Risk Factors of VRE

To understand how antibiotic-resistant bacteria like VRE emerges, it helps to first understand how bacteria and fungi change in response to medicines designed to kill them. According to the CDC, germs naturally evolve constantly, and can develop new ways to avoid the effects of antibiotics. Once that happens, the resistant germ survives and multiplies, and the surviving germs, which now have resistance traits in their DNA, pass on this genetic information to subsequent generations. These resistant germs can continue to spread and pose an increasing threat to people’s health.

VRE are most commonly found in healthcare settings, such as nursing homes or hospitals, particularly in areas where there are people with weakened immune systems, such as intensive care units or cancer or transplant wards. VRE can cause infections in patients and then spread to others when the patient is transferred to another facility or goes home.

VRE is typically not spread through the air like a cold or the flu and it cannot be spread through casual contact such as hugging. It is spread by direct contact with an infected person’s bodily fluids, such as blood, phlegm, urine, or stool, or by touching surfaces that have been contaminated by the bacteria.

If you are healthy, your chances of getting sick from VRE are very low, even if you have been exposed to the bacteria. But if you have a weakened immune system, that can be a very different story.

People who are more likely to have VRE include:

  • Those who have been treated with antibiotics, including vancomycin (particularly for long periods of time)
  • Individuals who have been hospitalized (particularly if you had surgery or have had medical devices such as catheters inserted into your body)
  • People who have weakened immune systems, such as those who have a long-term illness or are in intensive care units or cancer or transplant wards of a hospital

How Is VRE Diagnosed?

To confirm a VRE infection, your doctor will send a sample of your infected wound, blood, urine, or stool to the lab for analysis. At the lab, technicians will grow the bacteria and test it to see which antibiotics can kill the bacteria. If vancomycin can’t kill it, that confirms the existence of VRE.

Prognosis of VRE

In many cases, someone may carry VRE in their bodies and not develop any symptoms. It’s also possible for someone to get sick, have the infection go away, but still have the bacteria remain in their bodies without any problems. And sometimes, someone who gets sick from a VRE infection can get better, only to have the infection come back later.

Duration of VRE

How long you have a VRE infection can depend on how serious it is and how well it responds to treatment.

In some people, the VRE infection can go away on its own as their bodies naturally become stronger. This process can take a few months or even longer.

Treatment and Medication Options for VRE

When someone develops a VRE infection, doctors typically turn to antibiotics that are alternatives to vancomycin. To identify which antibiotic might be best to treat a specific infection, the physician will collect a sample from the patient and send it to a lab, where technicians will see which antibiotics may be effective at killing the germ.

Medication Options

Some vancomycin-alternative medications that may be used include:

People who carry VRE in their bodies without any symptoms of infection or other problems will not need any treatment.

Prevention of VRE

One of the most effective ways to reduce the risk of VRE transmission is through proper hand-washing. Enterococcus can live on hands for as long as 60 minutes after contact and as long as four months on inanimate surfaces.

In the hospital setting, good basic hand hygiene by healthcare providers and use of gowns and gloves can also help decrease transmission, as can isolating patients who are identified as being high-risk for contracting VRE.

If you or someone in your household has VRE, the following measures can help prevent the spread of infection:

  • Wash your hands thoroughly and frequently, especially after using the bathroom, before and after handling medical devices or caring for wounds, and before preparing food.
  • Clean common areas of the home, such as bathrooms, frequently.
  • Wear gloves when caring for wounds (such as changing bandages) or doing other caregiving duties that may involve coming into contact with bodily fluids, and always wash your hands after removing your gloves.

Complications of VRE

While VRE can remain harmless in the body, it can also multiply and wreak havoc. The bacteria can invade the bloodstream and cause a wide variety of illnesses, including the following:

  • Bacteremia (bacterial infection that has spread to the bloodstream)
  • Urinary tract infection
  • Endocarditis (infection of a heart valve)
  • Meningitis
  • Wound infection
  • Pneumonia
  • Intra-abdominal infections (such as peritonitis)
  • Pelvic infections
  • Skin and soft tissue infections

It’s important to note that these complications can also be caused by something unrelated to VRE infections.

Research and Statistics: Who Has VRE?

While the problem of antibiotic-resistant bacteria is an ongoing issue, it is improving, thanks to measures being taken by medical professionals who are working diligently to combat the problem. According to the CDC, infections caused by VRE decreased by 41 percent from 2013 to 2017.

Some other statistics that illustrate the scope of the problem and our need for continued mitigation:

  • VRE caused an estimated 54,500 infections among hospitalized patients in 2017.
  • That same year, 5,400 people died from VRE.
  • More than 2.8 million antibiotic-resistant infections occur in the United States each year; more than 35,000 people die as a result of these infections.

Related Conditions of VRE

Conditions that may resemble those caused by VRE infection (but may not necessarily be caused by this bacteria) include:

  • Bacterial sepsis
  • Other hospital-acquired infections
  • Endocarditis
  • Peritonitis and abdominal sepsis
  • Septic arthritis
  • UTI
  • Wound infection

Resources We Love

Centers for Disease Control and Prevention (CDC)

The CDC is leading the charge against antibiotic-resistant pathogens such as VRE. This page details important information about what VRE is and how we can protect ourselves from this and other antibiotic-resistant germs that threaten our health. It also links to the latest threats report, which lays out useful and important information about VRE and other dangerous bacteria that should be on everyone’s radar.

MedlinePlus

This site from the U.S. National Library of Medicine offers essential information about who is at risk for VRE and how to prevent the spread of this potentially dangerous, even deadly bacteria.

Michigan Medicine

University of Michigan’s Michigan Medicine explains in simple, jargon-free language exactly why VRE is a problem; what we need to know about basics like how it’s spread, diagnosed, and treated; and, most importantly, how to prevent it.

Additional reporting by Joseph Bennington-Castro.

Editorial Sources and Fact-Checking

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