Outbreak reportindependent cross-checkabstract checked I-MEAT-108 standard review
Illegal growth drug in beef caused acute poisoning in Italy
Clinical and pharmacological profile in a clenbuterol epidemic poisoning of contaminated beef meat in Italy.
Overview
Brambilla G et al.. Toxicol Lett 2000 · PMID 10713468 · DOI 10.1016/s0378-4274(99)00270-2
15 people developed tremors, palpitations and headache after eating beef with clenbuterol; all recovered in 3-5 days.
Does the study support the specific claim? Partly · Methodological quality: low
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Describe a meat poisoning outbreak.
- How was the study done?
Case series with lab analysis.
- How many people, animals or samples were studied?
15 people.
- What was actually found?
Acute, reversible symptoms from illegal residues.
- How large was the observed effect?
Not applicable.
- What do the results mean in everyday life?
Illegal drug use in animals can make meat dangerous; this is why residue controls exist.
- What are the study's limitations?
Single incident.
- What does it say about Elawady's specific claim?
Partly supports concern about residues, not chronic neuropathy.
- Do the results apply to Germany and Europe?
Historic EU incident.
- What can explicitly not be concluded from this study?
It cannot show that ordinary meat damages nerves.
Scientific in-depth review
1. Full reference
- Authors
- Brambilla G et al.
- Journal
- Toxicol Lett
- Year
- 2000
- Identifier
- PMID 10713468 DOI 10.1016/s0378-4274(99)00270-2
- Verification
- verified – PubMed efetch 2026-10-26; Crossref works API 2026-10-26
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
not stated in abstract
2. Research question
What were the clinical and pharmacological features of a clenbuterol poisoning outbreak from beef?
3. Study design and population
- Study design
- Outbreak report – Outbreak case report with pharmacological analysis
- Population
15 people who ate contaminated meat (9 hospitalised)
- Country
Italy
- Period
not stated in abstract
- Sample size
15
- Inclusion and exclusion criteria
not detailed in abstract
4. Methods and endpoints
- Exposure / intervention
Beef containing clenbuterol 1140-1480 ng/g edible tissue (illegal growth promoter)
- Comparator
Not applicable
- Endpoints
Symptoms; urinary clenbuterol
- Statistical methods
Descriptive; pharmacokinetic computation
5. Actual results
- Results
Symptoms 0.5-3 h after eating: distal tremors, palpitations, headache, tachypnoea-dyspnoea, moderate hyperglycaemia, hypokalaemia and leucocytosis; resolved within 3-5 days. Clenbuterol found in urine of all symptomatic patients (mean 28 ng/ml at 36 h). Authors note that clenbuterol accumulates in liver rather than meat of treated animals.
- Absolute risks
not reported
- Authors' conclusion
Epidemic poisoning can result from contaminated meat; residue toxicokinetics need better definition.
6. Strengths
- Laboratory-confirmed exposure
7. Weaknesses
- Single outbreak; illegal use
- Acute adrenergic effects, not neuropathy
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
Case series.
9. Assessment of the statistical interpretation
Not applicable.
10. Relevance to the specific claim
The only kind of real event resembling the claim: illegal beta-agonist residues in meat/liver can cause acute nervous-system-type symptoms (tremor, headache). These are acute, reversible and due to illegal use, not chronic neuropathy from ordinary meat.
11. Independent contrary findings
EU residue monitoring non-compliance 0.11% (I-RES-07).
12. Transferability to Germany and Europe
Beta-agonists banned for growth promotion in the EU; Egyptian enforcement data not reviewed.
13. Overall methodological judgement
Shows a plausible kernel (illegal residues can harm; liver accumulates), but not the claimed chronic nerve damage from meat in general.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | low |
| Risk of bias | not assessable |
| Precision of results | not applicable |
| Directness | indirect |
| Reproducibility | replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | low |
| Adequacy of the interpretation (by the archive) | not applicable |
14. Open questions
Beta-agonist monitoring in Egyptian meat and liver.