How likely is a US adult to be hospitalized for a serious E. coli infection — including kidney failure (HUS) — from contaminated fresh produce like leafy greens, onions, or carrots?
Evidence quality 4.0/5
Eight-dimension review score against the quality rubric . Each dimension scored 1–5.
- D1 Source grounding
- 5/5
- D2 Source authority
- 5/5
- D3 Arithmetic
- 3/5
- D4 Uncertainty
- 4/5
- D5 Scope
- 3/5
- D6 Prose
- 4/5
- D7 Perception honesty
- 4/5
- D8 Caveat completeness
- 4/5
● your factors — click this risk ▾ to reveal
- Your factors
≈ As likely as
Perceived
No rigorous survey isolates how people rank their fear of E. coli from salad greens, onions, or carrots specifically. Coverage of recall outbreaks (McDonald's onions, Grimmway organic carrots) is intense and recurring, which tends to inflate the felt likelihood relative to the per-meal base rate. The intuition most people carry is that washed, raw vegetables are a near-zero risk and that meat is the real STEC hazard, which inverts the attribution data: O157 illness now traces more to produce than to beef.
Rough estimate: Most people would guess serious produce-linked E. coli is vanishingly rare for them personally (well under 1 in 100,000 lifetime), or alternatively over-weight it sharply in the weeks after a televised recall.
Source: editorial intuition, not polled
Actual
About 1,175 hospitalizations for produce-attributable E. coli O157 per year among ~335 million people
US population (all ages), annual
Show derivation
Headline counts a HOSPITALIZED (serious) O157 infection attributable to fresh produce, not every mild case. Start from CDC's 2019 burden update: STEC O157 causes ~1,730 domestically acquired foodborne hospitalizations/yr (90% CrI on the underlying illness estimate 31,400–201,000 vs point 86,200). Multiply by IFSAC 2023's 67.9% attribution of O157 illness to vegetable row crops (leafy greens etc.): 1,730 × 0.679 ≈ 1,175 produce-attributable hospitalizations/yr. Divide by ~335M US population = 3.51e-6/yr. Over a 59-year adult horizon (age 18+, site default): 1 − (1 − 3.51e-6)^59 ≈ 2.07e-4 ≈ 1 in 4,830. Uncertainty band scales the EID credible interval (≈0.36× to ≈2.33× the point) onto the lifetime figure: 7.5e-5 to 4.8e-4. Two caveats baked into the band but worth stating: (1) the 67.9% attribution is O157-specific, so non-O157 STEC produce illness (e.g. the 2024 O121 organic-carrot outbreak) is ADDITIONAL burden not counted here; (2) serious O157 and HUS skew toward young children, so applying an all-ages hospitalization rate to an adult horizon modestly overstates the typical adult's risk and understates a toddler's.
Caveats: Three structural caveats. (1) Scope mismatch by design: the headline counts a ho…
Three structural caveats. (1) Scope mismatch by design: the headline counts a hospitalized (serious) O157 infection, but the 67.9% produce-attribution and the 1,730 hospitalizations are O157-specific. The 2024 organic-carrot outbreak was E. coli O121, a non-O157 STEC not captured by that attribution figure, so the true serious-STEC-from-produce burden is somewhat higher than ~1 in 4,800. (2) Age skew: serious O157 and HUS concentrate in young children and the elderly. Applying an all-ages hospitalization rate to a 59-year adult horizon slightly overstates the typical working-age adult's risk and understates a toddler's — the multipliers address the HUS-progression side of this but not the catching-it side. (3) Episodic exposure: produce-attributable risk is dominated by discrete contamination events (a single contaminated lot of onions or carrots can produce 50–100 illnesses nationally), so the long-run average smooths over a lumpy, recall-driven reality. 8D self-score average is 4.0 with all dimensions ≥3; the main soft spots are D3/D5, where the headline chains two national estimates (burden × attribution) across a US-population denominator rather than a single direct measurement, and the attribution is O157-only.
Related risks
Other risks on similar themes — for exploring related fears.
Listeria from deli meat
How likely is a US adult to be hospitalized or die from listeria in deli meat?
Restaurant food poisoning
What are the odds of being hospitalized from food poisoning after eating at a restaurant?
Lead-tainted cinnamon pouch
What were the odds of a young child being a reported lead-poisoning case in the contaminated cinnamon applesauce outbreak?
Child bike trailer
What are the odds of serious injury to a child riding in a towed bicycle trailer?
Child rear bike seat
What are the odds of serious injury to a child riding in a rear-mounted bike seat?
Pick challenger
The McDonald’s Quarter Pounder outbreak of October 2024 is the cleaner illustration than most people expect, because the contaminated ingredient was not the beef. CDC traced 104 E. coli O157:H7 infections across 14 states to fresh slivered onions supplied by Taylor Farms. Of the 98 patients with available information, 34 were hospitalized, four developed hemolytic uremic syndrome — the kidney-failure complication — and one older adult in Colorado died. Three weeks later a separate strain, E. coli O121, was traced to Grimmway Farms organic carrots: 48 sick across 19 states, 20 hospitalized, one HUS case, one death. Two produce items, two recalls, two deaths, inside a single autumn.
That inversion of intuition is the headline finding. The federal attribution model (IFSAC, 2023) assigns 67.9 percent of E. coli O157 illness to vegetable row crops such as leafy greens, and only 18.6 percent to beef. Combined with CDC’s 2019 burden estimate of roughly 1,730 domestically acquired O157 hospitalizations per year, that yields about 1,175 serious produce-attributable O157 infections annually. Spread across some 335 million people and a 59-year adult horizon, the lifetime probability of being hospitalized for one works out near 1 in 4,800. That sits just below the lifetime odds of dying from food poisoning of any kind and well above a plane-crash death, in a band where the risk is real but rare.
The number is built by chaining two national estimates rather than counting a single tracked event, so its uncertainty is wide, running from roughly 1 in 13,000 to 1 in 2,100. It also undercounts in one direction and overcounts in another. It undercounts because the 67.9 percent attribution is specific to O157, and the carrot outbreak’s O121 strain — like most non-O157 Shiga-toxin E. coli — falls outside it; the serious-STEC-from-produce total is therefore somewhat higher than the headline. It overcounts for the typical adult because both serious infection and HUS concentrate in the very young. In FoodNet surveillance (Gould et al.), 6.3 percent of all O157 infections progressed to HUS, but 15.3 percent did among children under five, roughly 2.4 times the average. A salad-eating adult and a toddler eating the same recalled carrots do not face the same downstream risk of kidney failure, and the per-meal base rate stays low for everyone between the recalls that briefly make it feel otherwise.
Related tidbits
Catching a serious E. coli O157 infection from fresh produce runs about 1 in 4,800 over a US adult lifetime. Leafy greens drive most outbreaks, but the per-meal odds stay small against a population-sized denominator.
Claim ledger
Every number below is what each source reported, with the verbatim quote we relied on and how we arrived at our figure. Click any link to verify directly.
-
[1] CDC, Emerging Infectious Diseases — Foodborne Illness Acquired in the United States—Major Pathogens, 2019
Foodborne Illness Acquired in the United States—Major Pathogens, 2019- Statistic
STEC O157 caused ~86,200 domestically acquired foodborne illnesses/yr (90% CrI 31,400–201,000) and ~1,730 hospitalizations in 2019- Excerpt
“STEC O157 caused more (1,730 [55%]) hospitalizations than all non-O157 STEC serogroups”
- Source data from
- 2025-04-01
- Accessed
- 2026-06-13 · archived copy
- Calculation
- Provides the serious-outcome denominator: 1,730 O157 foodborne hospitalizations/yr nationally. The illness point estimate 86,200 (90% CrI 31,400–201,000) sets the ±range carried into normalized.uncertainty (≈0.36×–2.33× the point).
-
[2] CDC / FDA / USDA-FSIS (Interagency Food Safety Analytics Collaboration) — Foodborne Illness Source Attribution Estimates — 2023 (IFSAC Annual Report)
Foodborne Illness Source Attribution Estimates — 2023 (IFSAC Annual Report)- Statistic
67.9% of E. coli O157 illnesses attributed to vegetable row crops (leafy greens etc.); 18.6% to beef- Excerpt
“Over 85% of E. coli O157 illnesses were attributed to vegetable row crops (67.9%, such as leafy greens) and beef (18.6%).”
- Source data from
- 2023-12-31
- Accessed
- 2026-06-13 · archived copy
- Calculation
- Supplies the produce-attributable fraction (0.679) applied to the 1,730 hospitalizations: 1,730 × 0.679 ≈ 1,175/yr. Attribution is O157-specific and based on 1998–2023 outbreak data; non-O157 STEC produce burden is not included.
-
[3] CDC — E. coli Outbreak Linked to Onions Served at McDonald's
E. coli Outbreak Linked to Onions Served at McDonald's- Statistic
104 infected across 14 states; 34 hospitalized; 4 developed HUS; 1 death (older adult, Colorado)- Excerpt
“Of 98 people with information available, 34 have been hospitalized, and 4 people developed hemolytic uremic syndrome (HUS), a serious condition that can cause kidney failure. One death has been reported from an older adult in Colorado.”
- Source data from
- 2024-12-03
- Accessed
- 2026-06-13 · archived copy
- Calculation
- Illustrative single-outbreak proof point that slivered onions (a fresh produce item) caused serious O157 disease including HUS and death; the 34/104 ≈ 33% hospitalization fraction in an outbreak setting is far above the background rate because outbreak detection skews toward severe cases. Live CDC page confirmed 104/14/34/1 directly; the 4-HUS and 98-with-info sentence was confirmed verbatim via two independent CDC-text search returns plus the restored-CDC mirror.
-
[4] CDC — E. coli Outbreak Linked to Organic Carrots
E. coli Outbreak Linked to Organic Carrots- Statistic
48 infected across 19 states; 20 hospitalized; 1 HUS; 1 death (E. coli O121, organic carrots, Nov 2024)- Excerpt
“Cases: 48 | States: 19 | Hospitalizations: 20 | Deaths: 1”
- Source data from
- 2024-12-18
- Accessed
- 2026-06-13 · archived copy
- Calculation
- Second proof point and the basis for the non-O157 caveat: this outbreak was E. coli O121 (a non-O157 STEC), which the 67.9% O157 attribution does NOT capture, so the true produce-attributable serious-STEC burden is somewhat higher than the headline. Whole/baby carrots are a fresh produce item; recall was Grimmway Farms.
-
[5] Gould et al., Clinical Infectious Diseases (PubMed) — Hemolytic uremic syndrome and death in persons with Escherichia coli O157:H7 infection, FoodNet sites, 2000-2006
Hemolytic uremic syndrome and death in persons with Escherichia coli O157:H7 infection, FoodNet sites, 2000-2006- Statistic
6.3% of O157 infections progressed to HUS overall; 15.3% among children <5- Excerpt
“A total of 3464 STEC O157 infections were ascertained; 218 persons (6.3%) developed HUS. ... The highest proportion of HUS cases (15.3%) occurred among children aged <5 years.”
- Source data from
- 2009-12-01
- Accessed
- 2026-06-13 · archived copy
- Calculation
- Basis for the child HUS multiplier: 15.3%/6.3% ≈ 2.4× on the HUS-given-infection axis (distinct from catching the infection). Also grounds the prose claim that kidney-failure risk concentrates in young children.