CDC chief: Staph Super germ the 'cockroach of bacteria'
Pastor Dale Morgan
CDC chief: Staph Super germ the 'cockroach of bacteria'*
* Story Highlights
* CDC chief: Drug-resistant staph infection preventable by common-sense
hygiene
* Risk outside hospitals comes from close contact -- sharing towels, razors
* Contact in sports environments with open wounds also creates risk
* CDC estimates 94,000 serious MRSA infections occur each year
WASHINGTON (AP) -- Drug-resistant staph infections that have made
headlines in recent weeks come from what the nation's top doctor calls
"the cockroach of bacteria" -- a bad germ that can lurk in lots of
places, but not one that should trigger panic.
Methicillin-resistant Staphylococcus aureus is a form of the incredibly
common staph family of germs.
"This isn't something just floating around in the air," Dr. Julie
Gerberding, head of the Centers for Disease Control and Prevention, told
members of Congress on Wednesday.
It takes close contact -- things like sharing towels and razors, or
rolling on the wrestling mat or football field with open scrapes, or not
bandaging cuts -- to become infected with the staph germ called MRSA
outside of a hospital, she said.
But MRSA is preventable largely by common-sense hygiene, Gerberding
stressed.
"Soap and water is the cheapest intervention we have, and it's one of
the most effective," she told a hearing of the House Committee on
Oversight and Government Reform.
At issue is methicillin-resistant Staphylococcus aureus, a form of the
incredibly common staph family of germs.
About one in every three people carries staph aureus in their noses. In
about 1 million people, the type they carry is MRSA.
"I like to think of it as the cockroach of bacteria," Gerberding said,
pointing out MRSA's ability to live on various surfaces and spread by
catching a ride on an unwashed hand.
Over time, germs evolve to withstand treatment. Most staph is no longer
treatable by the granddaddy of antibiotics, penicillin. By the 1960s,
staph also began developing resistance to a second antibiotic, methicillin.
So MRSA is not a new problem. What is new is public anxiety about it.
MRSA mostly causes skin infections, such as boils and abscesses. But it
can sometimes spread to cause life-threatening blood infections. Last
month, the CDC reported the first national estimate of serious MRSA
infections -- 94,000 a year. It's not clear how many people die, but one
estimate put the MRSA death toll at more than 18,000, slightly higher
than U.S. deaths from AIDS.
There are two distinct strains of MRSA, a type spread in hospitals and
other health facilities and a genetically different type spread in
communities. The vast majority of victims are hospital patients; only 14
percent of serious MRSA infections are the kind spread in the community.
But the CDC's report coincided with the death of a 17-year-old Virginia
high school student, prompting a spate of reports of MRSA infections in
schools. That prompted lawmakers to pepper Gerberding with questions
Wednesday:
• Should schools close for cleaning if a student gets MRSA? That's not
medically necessary, Gerberding said. Bleach and a list of other
germicides can be used in routine cleaning of areas and equipment where
bacteria cluster.
"There's no need to go in and disinfect a whole school, because that
isn't how this organism is transmitted," she said.
• How worried should parents be? Some 200 children a year will get
serious MRSA, and the vast majority will be treated successfully,
Gerberding said. Community-spread MRSA is still easily treated by many
other routine antibiotics. So wash and bandage cuts, and seek prompt
medical care if they show signs of infection.
Most outbreaks of community-spread MRSA occur not in schools but in
prisons, where inmates share toiletries and lack or don't use soap.
• Should every patient entering a hospital be tested for MRSA, and
isolated if they harbor it? Some hospitals have begun that, but current
guidelines call for that step only if hospitals fail to reduce MRSA
infections by less drastic means, Gerberding said.
Her concern: "Patients in isolation get less care." Doctors and nurses
check on them less. They get more bed sores, opening the body to other
life-threatening germs.
There is a biological conundrum: Hospital-based MRSA is more common,
vulnerable to fewer antibiotics than the strain spread in communities,
and those already-ill patients are more likely to die from it. Yet, the
community strain of MRSA may be somewhat stronger, possibly explaining
why otherwise healthy people sometimes succumb.
It's a strain called USA300, and if it penetrates the skin it can cause
key immune cells -- white blood cells -- to explode, setting off a chain
reaction of inflammation, Gerberding explained. This strain, unlike most
hospital MRSA, also produces a toxin known as PVL, and scientists are
furiously investigating its role.
New antibiotics are important, but won't solve MRSA or the myriad other
drug-resistant bacteria, she said.
Germs "will always be one step ahead of our drug stores," Gerberding
said. "We have to get back to the basics" -- wash your hands and cover
your cuts."