"Nightmare bacteria" are trying to spread in the US, CDC says

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“Nightmare bacteria” with the power to resist most antibiotics are popping up across the U.S., but new, aggressive policies can help stop them from spreading, federal health officials said Tuesday.

A new program for testing suspect bacteria turned up unusual antibiotic-resistance genes 221 times in 2017, the Centers for Disease Control and Prevention reported. And 11 percent of people screened for these superbugs carried them, even though they had no symptoms, the CDC said.

“CDC’s study found several dangerous pathogens, hiding in plain sight, that can cause infections that are difficult or impossible to treat,” said the CDC’s Dr. Anne Schuchat. “While they are appearing all over the place, an aggressive approach can snuff them out.”

Antibiotic-resistant germs kill more than 23,000 Americans a year.

They evolve quickly, developing mutations that let them evade the effects of antibiotics. If they are not stopped fast, they spread. Worse, the antibiotic-resistant DNA can be carried in little cassettes of genetic material called plasmids that bacteria can slip in their entirety to one another and to other species of bacteria.

It’s already happened several times in the U.S. — and when one superbug gives new powers to a different superbug, the result can be an infection that is impossible to treat.

“Once antibiotic resistance spreads, it is harder to control—like a wildfire,” the CDC said in a statement.


The World Health Organization has labeled antibiotic resistance a “fundamental threat” to humanity.

The CDC tried out a new system aimed at quickly identifying these superbugs. They’ve helped staff up state health departments and labs to quickly test samples so that hospitals, clinics and other facilities can rapidly isolate patients infected with them.

“We were able to put 500 additional staff across the country to help with this,” Schuchat told NBC News.

Carrying germs, without any symptoms

The results were sobering. One in four of the samples sent in carried superbug genes, the CDC team reported. When the facilities involved looked further, they found 11 percent of seemingly unaffected people screened carried such germs without having any symptoms.

“This means the germ could have spread undetected in that health care facility,” the CDC said.

That is what has been happening for decades with all sorts of infections, from methicillin-resistant Staphylococcus aureus (MRSA) to killer Clostridium difficile infections.

Inappropriate overuse of antibiotics is and has been a major factor, said Dr. Lance Price, who directs the Antibiotic Resistance Action Center at George Washington University.

“Healthy people will carry these bugs without symptoms,” said Price, who was not involved in the CDC study. “We can spread them to susceptible people. We can become almost like a human mosquito, spreading these germs.”

“Nobody is writing a five-star review for that doctor who is a really good steward of antibiotics.”

“Nobody is writing a five-star review for that doctor who is a really good steward of antibiotics.”

Healthy people can unknowingly transmit the germs to a cancer patient, someone getting an organ transplant, a vulnerable newborn or a frail elderly person. That’s when an infection can take hold and kill.

“What the CDC is highlighting is the need, once you identify people carrying these bugs, to screen them and also their contacts to make sure they haven’t passed these bugs,” Price said.

The CDC tested for two of the best-known superbug germs: carbapenem-resistant Enterobacteriaceae or CRE, and carbapenem-resistant Pseudomonas aeruginosa (CRPA) bacteria.

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