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Medical: Auto-brewery syndrome

Introversion

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Microbes can produce so much alcohol that people become drunk—and sustain liver damage—without touching any booze.

The Atlantic said:
The man’s troubles began in 2004, when, having moved from China to attend college in Australia, he got really drunk. That would hardly have been a noteworthy event, except that the man hadn’t consumed any alcohol—only fruit juice.

The bizarre incident soon turned into a pattern. About once a month, and out of the blue, he’d become severely inebriated without drinking any alcohol. Over time, the episodes became more severe and more frequent. He lost jobs because people suspected him of being a closet drinker. He was frequently hospitalized. In 2011, he returned to China and his mother cared for him while monitoring him with a Breathalyzer. His blood-alcohol levels, she found, would erratically and inexplicably soar to 10 times the legal limit for driving.

In June 2014, at the age of 27, he was admitted to the intensive-care unit of Chinese PLA General Hospital, in Beijing. At one point, so much alcohol was on his breath that he couldn’t sleep through the night. Another time, he threw up and blacked out after chugging some soda water. A CT scan showed that his liver was damaged, inflamed, and riddled with fatty deposits.

The man was diagnosed with a rare condition aptly known as auto-brewery syndrome, in which microbes in a person’s gut ferment carbohydrates into excessive amounts of alcohol. The earliest cases were documented in Japan in the 1950s, and a few dozen more have been reported since, in people all over the world, and even in children as young as 3. The microbial culprits are usually yeasts—the same fungi used to brew beer and wine—and the condition can often be treated with antifungal drugs.

But those drugs didn’t work on the Chinese patient. Baffled, a team of doctors, led by Jing Yuan from the Capital Institute of Pediatrics, analyzed the man’s stool samples and found that the alcohol in his body was being produced not by yeast, but by bacteria. During his first episode in the hospital, Klebsiella bacteria had bloomed so vigorously that it made up 19 percent of the microbes in his gut, and became 900 times more common than in healthy people.

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MaeZe

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Wow! That's an interesting case. You'd think they could have figured it out sooner with close observation.
 

Brightdreamer

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Fascinating.

I've heard about this kind of thing - the yeast kind, not the bacteria kind - and keep thinking there should be a plot use for it, perhaps in a SF future where programmable gut microbes can be used to enhance (or weaken) people; the ability to incapacitate people with on-demand intoxication sounds potentially useful in the right (or wrong) hands...