Risk assessmentindependent cross-checkfull text checked★ key study I-VEG-16 in-depth review
Source of the 2011 E. coli outbreak
EFSA Task Force report on tracing seeds in relation to the STEC O104:H4 2011 outbreaks (press release 5 July 2011)
Overview
EFSA. Official document 2011
EFSA traced the outbreak to fenugreek seeds from Egypt used for sprouts.
Does the study support the specific claim? No · Methodological quality: moderate
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Trace source
- How was the study done?
Task Force tracing
- How many people, animals or samples were studied?
Not applicable
- What was actually found?
Egyptian fenugreek seeds
- How large was the observed effect?
Not applicable
- What do the results mean in everyday life?
Sprouts, not cucumbers, were the vehicle.
- What are the study's limitations?
Press summary
- What does it say about Elawady's specific claim?
Contradicts archive
- Do the results apply to Germany and Europe?
High
- What can explicitly not be concluded from this study?
Exact contamination point unknown.
Scientific in-depth review
1. Full reference
- Authors
- EFSA
- Journal
- Official document
- Year
- 2011
- Identifier
- Verification
- verified – Fetched https://www.efsa.europa.eu/en/press/news/110705 on 2026-10-25
- Retracted
- no
- Corrections
- none
- Extent checked
- full text
- Conflicts of interest and funding
Official body
2. Research question
Official position/data
3. Study design and population
- Study design
- Risk assessment – Official outbreak-tracing statement
- Population
Not applicable
- Country
EU/Germany
- Period
2011
- Sample size
Not applicable
- Inclusion and exclusion criteria
Not applicable
4. Methods and endpoints
- Exposure / intervention
Not applicable
- Comparator
Not applicable
- Endpoints
Not applicable
- Statistical methods
Not applicable
5. Actual results
- Results
One lot of fenugreek seeds imported from Egypt and used to produce sprouts is the most likely common link between the German and French outbreaks; other lots imported from Egypt 2009-2011 may be implicated.
- Absolute risks
not reported
- Authors' conclusion
Fenugreek seeds from Egypt are the most likely common link.
6. Strengths
- Official source
7. Weaknesses
- Not peer-reviewed study
8. Risk of bias
- Orienting tool
- none applicable
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- not assessable
- Rationale
Official document.
9. Assessment of the statistical interpretation
Not applicable.
10. Relevance to the specific claim
Contradicts cucumber framing (C-VEG-04).
11. Independent contrary findings
None.
12. Transferability to Germany and Europe
High.
13. Overall methodological judgement
Official reference.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | moderate |
| Risk of bias | not assessable |
| Precision of results | not applicable |
| Directness | direct |
| Reproducibility | unknown |
| Consistency with the overall evidence | unknown |
| Regional transferability | high |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
None.
15. Linked fact checks
- Germany's 2011 E. coli O104:H4 epidemic was traced to sprouts and cucumbers. – Studies contradicting or limiting the claim