You have died of dysentery. That joke has aged from a classic computer game gag into a live public health warning, because the bacteria behind it is now spreading through sex and outrunning the antibiotics we use to kill it. One expert says it has gone from treatable with off-the-shelf drugs to "close to untreatable" in about a decade.
The Bug Your Great-Great-Grandfather Feared
Shigella infects nearly half a million people in the US every year, according to reporting from the New York Post. The symptoms are exactly as fun as they sound: diarrhea with blood or mucus, stomach pain, cramps, fever and vomiting. Blood or mucus in the stool is the hallmark of dysentery, the same affliction that wiped out wagon trains in the 1800s.
It gets worse than an unpleasant bathroom afternoon. Shigella can dehydrate you, drain your fluids and your blood, and spiral into septic shock, neurological complications and internal bleeding. This is not a bug you want to meet in person.
And it doesn't take much. As few as 10 organisms can make you sick. Ten. You have more microbes than that on your phone right now, and you're reading this on it.
How It Spreads Beyond Day Care
The traditional route is the fecal-oral one, which is a polite way of saying infected poop reaches a mouth through unwashed hands or tainted food and water. Kids under 5 are the classic victims, since day cares are basically petri dishes with snack time. Travelers to places with weaker sanitation and people experiencing homelessness are also at higher risk.
But one of the fastest-growing groups of infections is among gay and bisexual men and other men who have sex with men. Experts describe shigella as endemic in those communities, meaning it's constant and regularly present. A July study found that sexual spread grew 15% faster year over year between 2015 and 2020 than spread through travel, food, or nursery outbreaks.
There's a catch in the data. Sex may already be the major route of transmission, but nobody can say for sure, because doctors often don't ask patients about it when they show up sick. You can't track a transmission route you never bother to inquire about.
Nobody Told You This Was a Thing
Here's the part that should make every public health official wince. Many people simply don't know shigella can be sexually transmitted. Cambridge geneticist Kate Baker, a lead author on the July study, said many men who have sex with men are unaware of the serious and increasing risk.
That's not a moral failing. That's a messaging failure. When a disease is spreading through a specific population and the people in that population haven't heard about it, someone dropped the ball, and it wasn't the patients.
The CDC's prevention advice is blunt and sensible. Wash your hands, genitals and anus with soap and water before and after sex. Wash sex toys. Use condoms and dental dams. This applies to everyone having anal, oral or vaginal sex, not just men who have sex with men. The California Department of Public Health adds the simplest rule of all: don't have sex with someone who's had diarrhea in the last two weeks. Romance is dead, but so is the alternative.
From 0% to 8.5% in 12 Years
Now the number that should keep you up at night. The CDC reports that drug-resistant shigella strains went from 0% in 2011 to 8.5% in 2023. Most of the resistant cases hit adult men.
"This disease has gone from being relatively treatable with off-the-shelf drugs to being close to untreatable over the course of the last decade or so," Baker said. That is a scientist describing a bacterial infection the way a mechanic describes a car that has already gone over a cliff.
And the sexually transmitted versions aren't a minor inconvenience. People who caught shigella through sex were hospitalized for four to five days on average. That's a week of your life, a pile of medical bills, and a very awkward conversation with the hospital intake nurse.
How Bacteria Learn to Beat the Drugs
Why is this happening? Some experts point to something called "bystander resistance." It works like this: the wrong antibiotic gets used on a pathogen, and instead of killing it, the drug hands the bug a chance to evolve a defense. We basically hold a training camp for the bacteria.
Baker told Science Alert this isn't one bug. It's multiple overlapping variants emerging at once, all quickly becoming resistant to the drugs used to treat them. If you caught shigella through sex, you likely need different treatment than someone who caught it while traveling.
Many cases clear up on their own within a week with rest and fluids. For serious infections, antibiotics can shorten the illness and make you less contagious. The problem is that the shelf of working antibiotics keeps getting shorter.
The Dingo Take
In 1854, John Snow took the handle off a London water pump and ended a cholera outbreak, because he followed the evidence to where the disease was actually spreading. That's the whole game in public health. You find the route, you tell people about it, and you cut it off. We are currently failing at step two.
A bug that causes bloody diarrhea and septic shock is spreading through a specific community, resistant strains have gone from zero to 8.5% in 12 years, and a Cambridge geneticist is saying that many of the people at highest risk haven't been told. Doctors aren't even asking patients how they might have caught it. You cannot fight a disease you refuse to look at, and squeamishness is not a medical strategy.
So here's the deal. Wash up, use barriers, and don't sleep with anyone who's been running to the bathroom for two weeks. Pressure your health officials to do the unglamorous work of telling people the truth about how this spreads, without shame and without a lecture. Dysentery wiped out pioneers because they had no idea what was killing them. We have no excuse.
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