
E. coli O145:H28 is a Shiga toxin–producing E. coli — a STEC, in the shorthand. The number-and-letter name is just how microbiologists fingerprint the bug: “O145” describes the sugar coat on the outside of the cell, and “H28” describes its flagella, the little whip it swims with. Put them together and you have one specific, well-defined strain.
And O145 is not some obscure oddball. It is one of the “Big Six” non-O157 STECs — O26, O45, O103, O111, O121, and O145 — that the USDA finally declared illegal adulterants in raw beef back in 2011 and 2012. And O145 did not land on that list by accident — I put it there. In 2009, my firm petitioned the USDA’s Food Safety and Inspection Service to declare these six non-O157 strains adulterants in ground beef, just as O157:H7 already was. FSIS agreed, and the ban took effect in 2012. In plain English, the government put O145 in the same legal category as the O157 that nearly killed Brianne Kiner in the Jack-in-the -Box outbreak all those years ago. It belongs there.
Here is the part people gloss over. STEC bacteria make Shiga toxins, and Shiga toxins are vicious. They shut down protein production inside your cells, and they have a particular appetite for the lining of the tiny blood vessels in your kidneys. The result, in the worst cases, is hemolytic uremic syndrome — HUS — which is a fancy medical name for kidney failure. It hits hardest in the people least able to withstand it: young children, the elderly, and anyone with a weakened immune system.
The illness usually starts three or four days after exposure with cramps and diarrhea, then often turns bloody within a day or two. It typically comes without much fever, which is exactly why it gets mistaken for something else. And O145:H28 is not gentle. In a British outbreak tied to unpasteurized cheese, two-thirds of the victims had bloody diarrhea and nearly half of them ended up in the hospital.
Like its O157 cousin, O145:H28 lives in the guts of cattle and other ruminants, which carry it without getting sick and shed it in their manure. From there it gets into our food the usual ways: undercooked beef, raw milk and raw-milk cheese, and fresh produce contaminated out in the field by irrigation water, runoff, or manure. That British cheese outbreak was traced right back to the cows — investigators found the exact outbreak strain in cattle at the dairy that made the cheese.
Wash your lettuce all you want; that will not save you from contamination that got in at the farm. And freezing does not kill this bug either — which brings me to the blueberries.
On July 3rd, a Chilean grower-packer recalled its ten-ounce bags of GreenWise Organic frozen blueberries — the Publix store brand — after they tested presumptively positive for E. coli O145:H28. The berries went to Publix stores in eight states: Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, Tennessee, and Virginia. It is a single lot, code 6040 01, with a Best By date of February 9, 2028.
Twelve people got sick between May 11th and June 5th. Florida’s health department was the one that connected the dots and pointed at the blueberries, and Publix pulled them from its shelves. To its credit, the FDA has now put the outbreak on its public list. But I will be honest about what bothered me from the start: for days, the only case count anyone could find came from the company doing the recalling — not from a health agency. When the people whose job it is to warn the public go quiet, families in eight states are left guessing whether the bag in their freezer is the one that will send their child to the hospital.
O145:H28 outbreaks have a bad habit of never getting solved.
Here is the whole record, going back more than a quarter century — and notice how often the trail simply goes cold:
1999 — Minnesota. Two children at a day care passed it back and forth. One of the earliest O145 clusters anyone in this country bothered to write down.
2005 — Oregon. Campers at Camp Yamhill got sick from drinking water fouled after heavy rain, carrying a mix of bugs — O157:H7, Campylobacter, and O145.
2007 — Belgium. Farm-made ice cream at two birthday parties carried O145 and O26 together. The same strains showed up in the farm’s calves and its soiled straw; the pasteurizing was fine, so a farmhand most likely recontaminated it after the fact.
2010 — Freshway Foods romaine lettuce. The first documented U.S. foodborne O145 outbreak. Thirty-three people across five states — Michigan, Ohio, Tennessee, Pennsylvania, and New York — a lot of them college students. Twelve were hospitalized, three with HUS. An unopened bag of the shredded romaine tested positive, and the trail ran back to a farm in Yuma, Arizona. Solved.
2010 — Minnesota venison. High school students who handled and ate undercooked wild deer in a class picked up a mix of non-O157 strains, O145 among them.
2010 — Zillman Meat Market, Wisconsin. Smoked game-meat products out of a Wausau meat market sickened people in Wisconsin and Michigan who had shared them around.
2012 — Nine states. Eighteen people, from Alabama, California, Florida, Georgia, Kentucky, Louisiana, Maryland, Tennessee, and Virginia. Four hospitalized. One dead, in Louisiana. Source: never identified. Case closed.
2023 — United Kingdom. Thirty-six people, many of whom had eaten unpasteurized cheese served in first-class train dining. Investigators ran it back to dairy cattle and found the outbreak strain in the herd. Solved.
In 2024, an O145:H28 cluster in this country sickened eight people. Source: never identified. Case closed.
In the spring of 2025, another O145:H28 cluster hit eleven people. Three were hospitalized. One developed HUS. One died. Source: never identified. Case closed.
Across the Atlantic in 2024, a national O145:H28 outbreak in the United Kingdom grew to nearly three hundred cases, with eleven cases of HUS and two deaths — and British investigators actually ran it to ground. It was lettuce.
The very same strain that just turned up in frozen blueberries has killed people in outbreaks our own agencies gave up on. An “unsolved” outbreak is not a victimless one. It is simply an outbreak where the traceback ran out of road before anyone had to answer for it. And it raises a question the FDA and CDC ought to be chasing right now: does this Chilean blueberry lot explain one of those earlier clusters they quietly closed as “not identified”? That is exactly what whole genome sequencing and a real traceback are for. Somebody should be asking.














