Claudia PassarellMay 21, 2025 5 min read

Colon Cancer Alert: Deadly Infection Surge Sparks Warnings for Older Adults

Adobe Stock

You’ve probably heard the usual advice: eat your fiber, get screened, stay active. But what if there’s more to the colon cancer conversation than just lifestyle and genetics?

Health officials are now sounding the alarm after a sharp rise in infections tied to colon cancer. An outbreak that has already led to six deaths and nearly 400 hospitalizations across the U.S.

The twist? The root of the problem isn’t the cancer. It’s a specific strain of E. coli, a bacterium most of us associate with food poisoning. But this one produces a toxin called colibactin, and scientists believe it may actually damage DNA in the colon, increasing the risk of cancer.

This Isn’t Just About Genetics Anymore

For years, doctors have emphasized family history as one of the biggest predictors of colon cancer. And while that’s still true, this new discovery changes the game.

According to recent studies, even those with no family history could be at risk simply because they were exposed to this toxin-producing E. coli somewhere along the way.

Adobe Stock

That exposure could’ve happened years ago, through something as ordinary as eating undercooked meat, drinking contaminated water, or even poor hygiene practices that let the bacteria spread.

Now, with this new wave of infections, scientists are taking a closer look at how our environments and the bacteria we live with might be affecting our long-term cancer risk.

Know the Warning Signs

Colon cancer doesn't always scream for attention, at least not at first. That's what makes early detection so crucial. If you're over 50, here are symptoms that should never be ignored:

  • Ongoing changes in bowel habits (constipation or diarrhea)

  • Blood in the stool or rectal bleeding

  • Persistent abdominal discomfort or cramps

  • Fatigue or unexplained weakness

  • Sudden weight loss without dieting

These might seem like minor annoyances, but they could also be your body’s way of warning you of something more severe. If anything feels off, don’t wait. Get it checked.

Why Older Adults Are More Vulnerable

Our immune systems naturally weaken as we age, making it harder to fight off infections. At the same time, decades of dietary habits and environmental exposure can enhance or inhibit cancer risks. Many of us grew up during a time when food safety standards were less rigorous, and that long-term exposure may now be catching up.

Moreover, this generation didn't grow up with widespread colon cancer screening. Colonoscopies, which can detect polyps before they become cancerous, weren't regularly recommended until the late 1990s. If you're in your 60s or 70s and haven't had a screening in the last 10 years, now is the time.

Protecting Yourself Starts with Simple Choices

Adobe Stock

The good news? You can take practical, doable steps right now to lower your risk.

  1. Get Screened: If you're over 45, colon cancer screening isn't just a suggestion; it's a priority. Talk to your doctor about scheduling a colonoscopy or a less invasive fecal test.

  2. Watch What You Eat: Reduce intake of red and processed meats. Aim for a fiber-rich diet, leafy greens, and whole grains. Make sure meats are fully cooked, and avoid unpasteurized dairy products.

  3. Know Your Family History: If colon cancer runs in your family, you may need to begin screenings earlier or more frequently.

  4. Stay Active: 30 minutes of moderate daily activity, like walking, can help regulate digestion and support a healthy immune system.

  5. Be Cautious With Antibiotics: Overusing antibiotics can disrupt the balance of good bacteria in your gut, potentially opening the door to harmful strains like colibactin-producing E. coli.

A Rising Trend That Deserves Attention

This recent outbreak is part of a larger, more troubling trend: colon cancer rates are rising among people under 55, and it remains one of the most common cancers among older adults. Yet it's also one of the most treatable when caught early.

Experts believe that environmental exposure, shifts in the gut microbiome, and dietary changes over the last few decades all contribute to this increase. However, they are still learning how exactly this bacteria triggers cancer and who is most at risk. But one thing’s for sure: staying silent about it won’t help. Talking to your doctor, getting screened, and making a few changes at home could go a long way.

Final Thought: Listen to Your Gut (Literally)

Many of those over 50 are entering what should be the most rewarding chapter of life. But that chapter can't be enjoyed without paying attention to health. Colon cancer might not be the most glamorous topic, but ignoring the signs could cost you everything.

Because when it comes to your health, it's never too late to take control.

Explore by Topic