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

Original publication

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
Multidimensional assessment
Authenticity of the sourceverified
Methodological qualityhigh
Risk of biaslow
Precision of resultsnot applicable
Directnessdirect
Reproducibilityreplicated
Consistency with the overall evidenceconsistent
Regional transferabilitymoderate
Adequacy of the interpretation (by the archive)essentially correct but incomplete

14. Open questions

None.

15. Linked fact checks

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