The number
of people sickened with fungal meningitis from tainted epidural steroid
injections has now risen to 91 in nine states, including seven deaths, federal
officials said Sunday, as investigators try to home in on the precise source of
contamination at a compounding pharmacy tied to the widespread outbreak.
Investigators
from the U.S. Food and Drug Administration and state officials are probing the
Framingham, Mass., facility where the New England Compounding Center made the
17,676 potentially tainted steroid injections, which were then shipped to 75
clinics in 23 states, according to federal and state officials.
A Centers
for Disease Control and Prevention spokesman said it isn't possible to know how
many cases there will be. The CDC and state health officials scrambled last
week and over the weekend to track down patients who received the shots to see
if they had been sick and to warn them to watch for possible symptoms.
The
numbers of cases are rising sharply now not necessarily because people are
continuing to get sick, but because investigators are pinpointing more
illnesses among those who already received the injections of methylprednisolone
acetate for relief of back and neck pain.
The
injections were given between July and September. So far, those who have been
infected developed symptoms between one and four weeks after receiving their
injections.
"There's
no evidence that new infections are occurring at a more rapid rate," said
John Jernigan, medical epidemiologist at the CDC who is involved in the
investigation.
It is too
early to know how many people ultimately will be affected. Federal and state
investigators must determine how many people received potentially contaminated
injections, then track down each one. They must then confirm that those who
have subsequently become ill actually had fungal meningitis and not another
disease. There are "too many variables to speculate on the number of
possible cases," said a CDC spokesman.
The
compounding pharmacy that produced the injections in question issued a recall
Saturday of all products made at its compounding center. "This action is
being taken out of an abundance of caution due to the potential risk of
contamination," the New England Compounding Center said in a statement.
The company has said it is cooperating with investigators. It had no further
comment Sunday.
The FDA
had already advised medical professionals last week not to use NECC-made
products.
Meningitis
is a potentially deadly inflammation of the brain or central nervous system. It
is usually caused by viruses or bacteria, but can also be brought on by fungi.
The two fungi found thus far in some patients—known as aspergillus and
exserohilum—are commonly found in the air and soil.
The fungal
form of meningitis is particularly difficult to diagnose because the symptoms
can be vague and mild initially, including fever, headache, nausea and
stiffness of the neck, according to the CDC. People with fungal meningitis can
also experience dizziness and confusion. Several of the patients in the current
outbreak have had strokes.
Most of
the people who have been sickened had normal immune systems, Dr. Jernigan said,
meaning they weren't at particular risk of infections. While the investigation
into how patients became infected is ongoing, there is some evidence to suggest
that the fungi in the medication penetrated the lining protecting the central
nervous system after being injected epidurally, Dr. Jernigan said.
While the
fungi aren't harmful in the environment, they can become deadly when they
flourish in a medication and are then injected directly into a part of the body
that should not have germs, Dr. Jernigan said.
One
possible victim, 56-year-old Tennessee resident Diana Reed, died Wednesday; she
got meningitis after receiving steroid injections, says a lawyer for her
family. She had received the injections at a facility that has since been
closed because of a meningitis outbreak, according to its Web site.
Ms. Reed
underwent an autopsy; the lawyer said he didn't yet know the results.
The
outbreak has drawn renewed attention to the little-regulated world of
compounding pharmacies. The FDA is hampered by federal law and conflicting
federal court decisions over its authority to regulate compounding pharmacies.
Current and former senior FDA officials said the agency has sought greater
authority over the past decade, but so far has been stymied.
Government
officials say the FDA is especially concerned about large compounding
pharmacies that send out large amounts of drugs across the country—as opposed
to a small pharmacy that may compound a medication three or four times a year.
In
particular, the agency hasn't been able to take the normal steps it would take
to ensure the safety of a drug produced at a compounding pharmacy. That
includes requiring and evaluating clinical trials, and inspection of
manufacturing facilities.
Attempts
in the past by the agency to regulate more strenuously have been challenged in
court.
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