Outbreak reportcited by the Tayebat archiveabstract only checked★ key study A-VEG-01 in-depth review
E. coli outbreak from bagged spinach, US 2006
Multistate Outbreak of Escherichia coli O157:H7 Infections Associated with Consumption of Fresh Spinach: United States, 2006.
Overview
Sharapov UM et al.. J Food Prot 2016 · PMID 28221950 · DOI 10.4315/0362-028X.JFP-15-556
225 people fell ill and 5 died after eating contaminated bagged spinach.
Does the study support the specific claim? Partly · Methodological quality: high
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Investigate outbreak
- How was the study done?
Outbreak investigation
- How many people, animals or samples were studied?
225 cases
- What was actually found?
Bagged spinach source
- How large was the observed effect?
5 deaths
- What do the results mean in everyday life?
Contamination incidents happen; hygiene matters.
- What are the study's limitations?
Single event
- What does it say about Elawady's specific claim?
Shows contamination risk
- Do the results apply to Germany and Europe?
Moderate
- What can explicitly not be concluded from this study?
Cannot show spinach is inherently harmful.
Scientific in-depth review
1. Full reference
- Authors
- Sharapov UM, Wendel AM, Davis JP, Keene WE, Farrar J, Sodha S, Hyytia-Trees E, Leeper M, Gerner-Smidt P, Griffin PM, Braden C, OUTBREAK INVESTIGATION TEAM
- Journal
- J Food Prot
- Year
- 2016
- Identifier
- PMID 28221950 DOI 10.4315/0362-028X.JFP-15-556
- Verification
- verified – PubMed E-utilities efetch, 2026-10-25
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
not stated in abstract
2. Research question
Identify source of a multistate O157:H7 outbreak.
3. Study design and population
- Study design
- Outbreak report – Outbreak investigation (epidemiological and laboratory)
- Population
Case patients in 27 states
- Country
USA
- Period
September-October 2006
- Sample size
225 cases
- Inclusion and exclusion criteria
Confirmed/probable cases
4. Methods and endpoints
- Exposure / intervention
Bagged fresh spinach (brand A)
- Comparator
None (descriptive)
- Endpoints
Hospitalisation, HUS, death
- Statistical methods
Descriptive, molecular subtyping
5. Actual results
- Results
225 cases (191 confirmed, 34 probable); 116 (56%) hospitalised; 39 (19%) HUS; 5 (2%) died; 161 of 176 (91%) ate fresh spinach; E. coli isolated from 13 bags.
- Absolute risks
not reported
- Authors' conclusion
Outbreak associated with fresh bagged spinach; led to enhanced federal and industry guidance.
6. Strengths
- Strong molecular link
7. Weaknesses
- Single event
8. Risk of bias
- Orienting tool
- none applicable
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- low
- Rationale
Robust outbreak investigation.
9. Assessment of the statistical interpretation
Descriptive.
10. Relevance to the specific claim
Supports C-VEG-03.
11. Independent contrary findings
Painter 2013 (context).
12. Transferability to Germany and Europe
Moderate.
13. Overall methodological judgement
Correctly cited outbreak.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | high |
| Risk of bias | low |
| Precision of results | not applicable |
| Directness | direct |
| Reproducibility | replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | moderate |
| Adequacy of the interpretation (by the archive) | essentially correct but incomplete |
14. Open questions
None.
15. Linked fact checks
- Leafy greens and cucurbits are at the centre of the modern fresh-produce outbreak record (E. coli, Salmonella, Listeria). – Studies supporting the claim
Use by the Tayebat archive
Note: according to the archive, the studies were compiled by the archive operators. Whether Dr. Elawady himself cited this study is not established.
- What the archive says about the study
225 cases, 116 hospitalised, 39 HUS, 5 deaths from bagged spinach.
- A. What was actually studied?
US spinach outbreak.
- B. What did the authors find?
As stated.
- C. What conclusions do the authors themselves draw?
Led to improved safety guidance.
- D. What does the archive derive from it?
Used to show greens are dangerous.
- E. Is this derivation scientifically justified?
Facts correct; a single contamination event does not make spinach inherently harmful.
- Adequacy of the interpretation (by the archive)
- essentially correct but incomplete