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A Dangerous, Silent Hiding Place for Gonorrhea: The Throat

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The human throat houses billions of bacteria, most of them harmless. But one species is becoming more common, and it is anything but benign.

Drug-resistant gonorrhea has been on the rise for years; the World Health Organization has reported an increase in more than 50 countries. Now scientists say the epidemic is being driven by a particular mode of transmission: oral sex.

“The throat infections act as a silent reservoir,” said Emilie Alirol, the head of the sexually transmitted infections program at the Global Antibiotics Research and Development Partnership. “Transmission is very efficient from someone who has gonorrhea in their throat to their partner via oral sex.”

Oral gonorrhea is hard to detect and treat. Even more worrisome, these bacteria pick up resistance to antibiotics directly from other bacteria in the throat — and then are communicated to sex partners.

Only one commercially available antibiotic still consistently works against drug-resistant strains. And now there’s a new worry: so-called super gonorrhea, impervious to every standard treatment.

“This bug always outsmarts us,” said Dr. Jeanne Marrazzo, an infectious disease specialist at the University of Alabama at Birmingham. “It’s really good at figuring out ways to become resistant.”

Whenever the human body is exposed to antibiotics — for an ear infection, a sore throat or any other illness — the natural bacteria of the throat are exposed, too. Over time, they can build up resistance to the drugs.

That’s generally not a concern until harmful bacteria are introduced. Sharing close quarters with the natural occupants of the throat, the invaders exchange DNA in a process called horizontal gene transfer.

This process relies on plasmids, small circular DNA molecules that contain the bacterium’s genetic material but are separate from chromosomes. Plasmids can easily be transferred from one bacterial species to another when they are close by.

When the plasmid in question contains drug-resistant genes, the gonorrheal bacteria acquiring it become resistant to antibiotics, too. Thirty percent of all new gonorrhea infections in the United States are resistant to at least one drug, according to the Centers for Disease Control and Prevention, and studies show that gene transfer is largely the reason.

“The worry is that if we don’t stop this, if we don’t treat it properly, we’re going to see this happening more and more,” said Dr. Michael Mullen, an infectious disease specialist at Mount Sinai Hospital in New York.

Worldwide, gonorrhea infects about 78 million people each year. The number has been rising in recent years, partly because of decreasing condom use as fear of H.I.V. transmission has waned, and because of poor detection rates, failed treatments and increased travel as people carry drug-resistant strains from one country to another, according to the W.H.O.

Drug-resistant strains have increased in many countries in recent years, most notably in India, China, Indonesia, parts of South America, Canada and the United States. Little is known about trends in Africa or the Middle East because of a lack of consistent data.

Diagnosing oral gonorrhea typically involves taking a sample from the infected area and growing the bacteria in a lab.

But swabs from the throat often do not yield enough bacteria and they frequently do not grow. There are typically fewer gonorrheal bacteria in the throat than in the genitals, making the infection easier to overlook in the lab.

Even when detected, oral infections are harder to treat. Antibiotics are delivered in the bloodstream, but there are fewer blood vessels in the throat.

Untreated throat infections can spread to the genitals, where they can cause testicular and pelvic pain in men, and can be particularly dangerous for women, causing pelvic inflammatory disease, ectopic pregnancies and infertility.

“Women will bear a very high burden if we start having an increasing number of untreatable gonorrhea cases,” Dr. Alirol said.

The infection used to be cured by a variety of antibiotics, but the bacteria adapt quickly. Some strains have built up resistance to all but one treatment: an injection of an extended-spectrum cephalosporin paired with an oral form of azithromycin.

Even that is no longer a sure bet. There have been three cases of so-called super gonorrhea — in Japan, France and Spain — that resisted that treatment, too.

That does not necessarily mean that super gonorrhea is incurable, Dr. Alirol said. But doctors may have to resort to “off-label” treatments that haven’t been properly tested in humans — much higher doses of antibiotics, for instance, or older or stronger drugs.

“The problem of using off-label tools is that you don’t know which dose to give, or if it’s going to work,” Dr. Alirol said. “You want to keep these as last-resort tools. If you start giving them away, you will develop resistance to them, too.”

Researchers are currently working on three new drugs to treat gonorrhea, each in various stages of development. But beyond that, there aren’t many options for resistant gonorrhea.

There is not much incentive for pharmaceutical companies to develop new treatments. Unlike medicines for chronic diseases, these are only taken for short periods of time, and new drugs constantly need to be replenished as resistance builds up to the old ones.

None of the new drugs focus on effectively curing oral gonorrhea, Dr. Alirol said. It is the form that is detected least often, so people are less likely to seek treatment for it.

But it is also at the root of a growing public health problem.

“There is no use in developing a new treatment if it doesn’t work on the pharynx,” Dr. Alirol said. “You will not have an effect on the numbers.”

ANERI PATTANI
nytimes


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EDITOR’S STRONGLY RECOMMENDED READ

Increase in Large Earthquakes Expected Globally in 2018 as Earth’s Rotation Slows
IT SEEMS THAT SOME FOLKS DIDN'T TAKE THIS VERY IMPORTANT PIECE OF NEWS SERIOUSLY. IF YOU HAVEN'T READ THIS PLEASE DO SO AND PERHAPS EVEN TAKE SOME STEPS TO PREPARE SOME TYPE OF PRECAUTIONARY EMERGENCY PLAN BEFORE THE NEW YEAR SO YOU CAN BE PREPARED IN THE EVENT THAT THIS WERE TO HAPPEN IN YOUR AREA.

DID YOU KNOW…

There are 5 temples in Kyoto, Japan that have blood stained ceilings. The ceilings are made from the floorboards of a castle where warriors killed themselves after a long hold-off against an army. To this day, you can still see the outlines and footprints.
*UPDATED WEEKLY
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