April 17, 2006
Staph Infections:
Stealth Killers
By Thomas G. Dolan
For The Record
Vol. 18 No. 8 P. 30
A menace in
hospitals, it’s now spreading to the community.
Infectious
diseases, most notably methicillin-resistant Staphylococcus aureus
(MRSA), as well as vancomycin-resistant Enterococcus (VRE), are
wreaking havoc in the nation’s hospitals—and it’s
getting worse, according to experts. The irony, according to some,
is that they are almost entirely preventable, but an obdurate public
policy prevents the necessary steps from being taken. MRSA is now
spreading through communities and researchers don’t know why.
They also don’t know how to stop it.
Barry Farr,
MD, professor of medicine at the University of Virginia in Charlottesville,
says, “Staphis is a pathogen that has affected the human race
for thousands of years. The boils of the biblical Job were probably
staph,” adding that infectious diseases are still the leading
cause of death on the planet. In the United States, they are lumped
together as an aggregate, placing them third behind heart disease
and cancer. It’s in hospitals where staph infections do the
most damage.
The fact that
staph thrives in a hospital environment is hardly news, Farr says.
“Some 160 years ago, in 1842, Oliver Wendell Holmes, a great
physician and dean of the Harvard Medical School, published an article
in The New England Quarterly Journal of Medicine and Surgery stating
that doctors and nurses needed to take better care in preventing
the spread of staph from one patient to the next because their hands
and clothes can be contaminated and they can take the disease to
another patient where it can colonize. Exactly the same thing is
going on in hospitals today,” he says.
Farr says one
key difference, however, is that the new strains of MRSA have become
resistant to antibiotics. “Antibiotics have been said to be
one of the greatest triumphs of modern medicine,” he says.
“But now we’re in a situation in which between one quarter
and one half of all patients in hospitals—and all patients
in intensive care—receive antibiotics. In theory, you could
stop giving antibiotics and MRSA would fade away in hospitals, but
then people would be susceptible to all the diseases cured by antibiotics.”
Yet there is
a realistic solution available which, Farr says, is not rocket science
or some new technology breakthrough, but rather is based on keeping
hands and equipment clean, the same principles Holmes wrote about
in 1842.
This approach
has worked in other countries. “In Denmark, MRSA was causing
one third of bloodstream infections,” Farr says. “It
took them about a decade to bring it under control, to less than
1%, and they kept it under control at less than 1% for the next
quarter century. Similar dramatic results have been reported in
the Netherlands, Finland, and western Australia.”
Betsy McCaughey,
PhD, founder and chairman of the Committee to Reduce Infection Deaths,
reports that a few U.S. hospitals are proving that good hygiene
solutions work. For example, the University of Virginia Hospital
has eradicated MRSA; Pittsburgh’s Veterans Hospital reduced
MRSA by 85%; the University of Pittsburgh Medical Center-Presbyterian
Hospital slashed MRSA by 90% in its medical intensive care units;
and 29 healthcare institutions in Iowa eliminated VRE, another drug-resistant
germ.
McCaughey says
these institutions have tackled the staph problem through rigorous
hand hygiene, the meticulous cleaning of equipment and patient rooms,
and the testing of incoming patients to identify those carrying
MRSA. Wheelchairs and other equipment used to transport patients
who test positive for MRSA are not used for other patients. Also,
hospital staff must change their uniforms and footwear after entering
the MRSA patients’ rooms before they are permitted in other
areas of the hospital.
These may seem
like routine precautions that most hospitals would implement. However,
McCaughey, in a booklet titled “Unnecessary Deaths: The Human
and Financial Costs of Hospital Infections,” shows that typical
hospital hygiene falls far short in terms of adequately dealing
with these diseases.
In the booklet,
McCaughey says more than one half of the time caregivers fail to
clean their hands before treating patients. Gloves are not a solution
because pulling them on with dirty hands contaminates the gloves.
Nearly three quarters of patients rooms are contaminated with MRSA
and VRE. These bacteria are on cabinets, countertops, over-the-bed
tables, bed rails, and other surfaces. Once patients and caretakers
touch these surfaces, they become vectors for disease. Ordinary
cleaning solutions are effective against these bugs, but surfaces
need to be drenched for several minutes, not just sprayed and dried
quickly.
On top of the
failure to clean, there’s the matter of identifying carriers.
“Most U.S. hospitals don’t routinely test patients to
determine which ones are carrying MRSA and other bacteria,”
says McCaughey. “Seventy [percent] to 90% of patients carrying
MRSA bacteria are never identified.”
Clothing is
frequently a conveyor belt for infections. According to McCaughey,
when doctors and nurses lean over a patient who has MRSA, the white
coats and uniforms pick up bacteria 65% of the time and carry it
to other patients. Hospitals that are conquering infection require
their staff to put on fresh gowns or disposable aprons every time
they treat patients with MRSA. (The aprons cost a nickel and are
ripped off rolls like clear plastic dry cleaning bags.)
McCaughey cites
the case of a major academic hospital in New York City that is struggling
to control the spread of Clostridium difficile, an infection usually
caused by fecal material from one patient entering another patient’s
mouth. How could that happen? Doctors there suspect it’s because
clinical nursing assistants wear the same clothes while doing two
jobs: emptying bed pans and delivering food trays.
The privacy
curtains that surround a patient’s bed are seldom changed,
though they are often the last thing a caretaker touches before
treating a patient and the first thing touched afterward, when the
caretaker uses contaminated gloves to pull open the curtain. Stethoscopes,
blood pressure monitors, and other pieces of equipment frequently
carry live bacteria. “Does your doctor clean the stethoscope
before listening to your chest?” asks McCaughey. “Probably
not, though the American Medical Association recommends it.”
Implementing
all the necessary hygiene practices is clearly an onerous task.
After all, it took Denmark, a much smaller country than the United
States, 10 years to get it right. But what is the result of maintaining
the status quo?
“Multiple
studies show that diseases are not only deadly, but also, by ignoring
them, we are wasting money, for the people who buy insurance and
pay taxes, but also for hospitals,” says Farr.
In agreement
is McCaughey, whose recent report updates these multiple studies.
“One out of every 20 patients gets an infection in the hospital,”
she says. “Infections that have been nearly eradicated in
some countries—such as MRSA—are raging through hospitals
in the U.S.”
Patients who
do survive MRSA often spend months in the hospital and endure repeated
surgeries to remove infected tissue. “In 1974, 2% of staph
infections were MRSA. By 1995, the number had climbed to 22%; in
2003 an alarming 57% and still rising,” McCaughey reports.
In terms of
costs to hospitals, McCaughey says the following:
• Postsurgical
wound infections more than double a patient’s hospital costs.
When a patient develops an infection after surgery, the cost of
care increases 119% on average at a teaching hospital and 101% at
a community hospital.
• Urinary
tract infections increase a patient’s hospital costs by 47%
at a teaching hospital and 35% at a community hospital.
• The
average ventilator-associated pneumonia infection (a type of infection
contracted when a patient is on a respirator) adds $40,000 to a
patient’s hospital costs.
• A central
catheter-related bloodstream infection increases a patient’s
hospital costs by approximately $30,000 on average.
• Staph
infections are especially costly. These more than triple the average
hospital costs.
McCaughey reports
that there are approximately 2 million hospital infections per year
that cost the average patient an additional $15,275 in costs, which
means $30 billion is being spent annually to treat the problem.
This figure does not include doctors’ bills, home nursing
care, lost time at work, and other nonhospital costs.
“The
Institute of Medicine recently estimated that as many as 18,000
a year may die prematurely because they don’t have health
insurance,” McCaughey says. “But consider this even
more tragic fact: Five times that many people die each year from
hospital infection, and most of them are insured. Hospital infection
kills an estimated 103,000 people in this country each year—as
many deaths from AIDS, breast cancer, and auto accidents combined.
Most of these infections are preventable.”
In terms of
costs, McCaughey points out a recent study that shows that the 4.9%
of patients who developed infections in hospitals wiped out 61%
of the operating profits in those hospitals.
Since the solution—a
commitment to cleanliness—is known and verified, why is it
not a priority in this country?
“People
blame those damn doctors who order too many antibiotics and won’t
wash their hands,” says Farr. “This is true to an extent.
But I think our healthcare workers are as good as those in Denmark
and the other countries that have successfully implemented good
hygiene. It may sound silly, but tradition is very big in medicine.
On the administrative level in hospitals and on the national level,
the mantra has been, ‘cut costs.’ True, these new measures
would cost, to an extent, but that cost is nothing compared to the
unnecessary costs incurred and lives lost by doing nothing.”
McCaughey says
the Centers for Disease Control and Prevention (CDC) is partly to
blame. “The CDC has delayed calling on all hospitals to institute
the rigorous precautions that are working in other countries and
in the few U.S. hospitals that have tried them,” she says.
“CDC standard precautions are much less effective in preventing
hospital infections. In fact, the CDC guidelines result in these
infections traveling from patient to patient 1,500% faster than
the workable guidelines. Every year of delay has cost thousands
of lives and billions of dollars. The CDC constantly says it is
preparing to do more, but fails to act. The CDC has spent 25 years
tracking the rise of deadly drug resistant infections in hospitals,
but has done little to stop it.”
(Attempts to
contact the CDC for comment were unsuccessful.)
There are two
factors that may galvanize change, McCaughey says. “One is
from the trial lawyers. Remember asbestos? Hospital infection is
the next asbestos. The infection problem has all the hot button
essentials of a successful class action lawsuit: 2 million helpless
victims a year, copious evidence that infections are preventable,
and a consistent pattern of failure to act.”
Second, says
McCaughey, six states—Florida, Missouri, Pennsylvania, New
York, Illinois, and Virginia—recently enacted laws to provide
the public with risk-adjusted hospital infection report cards. Several
other states are poised to follow suit.
Hospital infections,
bleak as they are, at least have an optimistic component in that
there is a known solution. That may not be the case for the recent
rise of MRSA in the community. On September 7, 2005, scientists
at the National Institute of Allergy and Infectious Diseases Rocky
Mountain Laboratories published a paper on this matter in The Journal
of Immunology. The investigator who directed the study, Frank DeLeo,
PhD, says although community MRSA is currently a much less serious
problem than the hospital variety, “it is increasing nationally
at an alarming rate, and is difficult to treat.”
Farr points
to a recent study in which 9,000 people were randomly selected to
see how many Americans carried the community strain of MRSA. It
was found that 32% of all Americans carry the bacteria in some form,
whether it be a light infection that can quickly go away or the
more serious varieties.
The troubling
aspect of this strain is that it can infect healthy people. Often,
athletes, such as wrestlers and football players, who are in close
proximity to each other and at risk. But scientists warn that anyone
is at risk and also cite the strain’s ability to have devastating
effects in a short time. DeLeo mentions one child who died despite
being taken to the hospital just 12 hours after the outbreak occurred.
Although researchers
are working on the problem, DeLeo says, “we do not know why
cases of community-acquired MRSA infections are increasing, let
alone how they flourish. But we do know the community strains can
cause more severe forms of the disease.”
—
Thomas G. Dolan is a medical/business writer based in the Pacific
Northwest.
Subscribe to For
the Record Magazine!
|