Are Broccoli Sprouts Safe to Eat Raw After the Evergreen Outbreak?
Broccoli sprouts are still worth eating, and the sulforaphane research holds up. The catch right now is one brand: sixteen people across Washington, Montana, and Idaho have Salmonella tied to Evergreen Fresh Sprouts broccoli sprouts. Toss any Evergreen sprouts in the fridge and clean what they touched. Sprouts are the rare vegetable where washing cannot undo contamination once a seed carried it in. If you want to keep eating them, cook them.
Sixteen illnesses so far. Two people needed the hospital, and thirteen of the cases are in Washington, all tied to Evergreen Fresh Sprouts of Moyie Springs, Idaho. Illnesses started July 7 and were still coming in on August 18. Of twelve patients interviewed, seven had eaten broccoli sprouts. No formal recall has been issued yet, so the operative warning is a state do-not-eat advisory. Check the fridge. Throw out any Evergreen broccoli sprouts, and clean the drawer, the cutting board, and anything else they touched.
Why rinsing doesn't fix a contaminated sprout
Sprouts break the rule you'd apply to almost any other vegetable. Salmonella here isn't a surface problem. A few cells hitchhike in on the seed, land in a warm, moist sprouting environment, multiply by three to four orders of magnitude, and work their way inside the growing tissue. Once bacteria are internalized, washing, soaking, and scrubbing can't reach them. E. coli O157 has been cultured from the inside of sprouts even after their surfaces were disinfected.
The industrial step producers are supposed to use, a 20,000 ppm calcium hypochlorite soak on the raw seed, only cuts the risk. It doesn't erase it. In the 1999 Colorado clover-sprout outbreak, one sprouter had done the chlorine soak by the book and their sprouts still transmitted the pathogen, just at a lower rate than the sprouter who hadn't pretreated.
This is not a new problem for Evergreen. The company was linked to a 2014 E. coli O121 outbreak that sickened 19. Between 2010 and 2017, sprouts accounted for about a fifth of all Salmonella outbreaks in the US traced to fresh produce, despite being a food fewer than one in ten Americans eats routinely. The per-serving risk is high.
What actually reduces the risk at home
Cooking is the one consumer step the FDA endorses, because nothing else works reliably.
| Action | Does it eliminate Salmonella? | What the evidence shows |
|---|---|---|
| Rinsing or soaking under running water | No | Cannot reach bacteria internalized inside the sprout during germination |
| Scrubbing or a produce wash | No | Surface treatments don't touch the inside |
| Buying a brand that chlorine-treats its seeds | Reduces, doesn't eliminate | 20,000 ppm chlorine on the seed cut but did not prevent the 1999 Colorado outbreak |
| Cooking until piping hot all the way through | Yes, when the heat reaches the whole sprout | The one FDA-endorsed step; cross-contamination on prep surfaces can still infect you |
| Skipping raw sprouts (high-risk groups) | Yes | The rule public agencies name for children, older adults, pregnant women, and immunocompromised people |
Symptoms that mean it's time to call someone
Salmonella gastroenteritis usually starts within one to three days of exposure with diarrhea, cramps, and fever, and clears in four to seven days in a healthy adult. What you're watching for is any sign the infection has moved past a bad stomach bug. Call a clinician for bloody diarrhea, a fever above 102°F, or diarrhea lasting more than two days. Older adults sometimes miss the classic warning signs; the median episode in people over 65 runs about a week, and they land in the hospital far more often.
Who should skip raw sprouts entirely
Confirmed non-typhoidal Salmonella hospitalizes about one in five people overall. In adults 65 and older, it's closer to one in two, and about 3% die. When the infection reaches the bloodstream, the case-fatality rate globally is roughly 14 to 15%, and higher in older adults and people with HIV. Those numbers are why children under 5, adults over 65, pregnant women, and anyone immunocompromised should avoid raw sprouts. If someone in the house is in one of those groups, that rule is worth holding to even when there isn't an outbreak in the news.
Cook them, don't quit them
Broccoli sprouts are one of the densest food sources of sulforaphane, and the human trial evidence is worth taking seriously, even if it's still early for most clinical outcomes. A 12-week randomized trial in 291 adults exposed to airborne pollutants raised urinary excretion of a benzene-detoxification conjugate by about 61% and of an acrolein one by about 23%. A randomized trial in prediabetes lowered fasting glucose modestly, with a larger effect in a subset whose gut microbiota could convert glucoraphanin to bioactive sulforaphane. A short trial in men with elevated liver enzymes brought ALT down.
Cooking sprouts until they're piping hot preserves most of that value while stripping out the biology that makes raw sprouts a repeat outbreak vehicle. What would change the calculus is a validated home method that reliably kills internalized Salmonella, or a seed treatment that eliminates rather than reduces the load. Neither exists yet. Until one does, the answer isn't to give up broccoli sprouts. Cook them, and let anyone in the house who can least afford a Salmonella infection have theirs steamed.