Poultry farms inject chicks with gentamicin; consumers then ingest gentamicin with chicken liver, gizzards and meat, which damages kidneys and hearing.
Original statement
المزارع الفراخ اللي ما بتعرفش ربنا بيحقن الفرخه وهي صغننه كده حقنه جينتامايس
verbatim according to source. Translation by the project; the Arabic wording is authoritative.
Translation
Poultry farms inject chicks with gentamicin; consumers then ingest gentamicin with chicken liver, gizzards and meat, which damages kidneys and hearing.
Origin
- Source status
- Video transcript (own words)
- Attribution
- Elawady (machine transcript)
- Video
- Dr Diaa Al Awady د ضياء العوضي is live! الموت المفاجيء (Open source)
- Published
- 14 July 2025
- Timestamp
- 0:26:27 (location in the original video’s automatic YouTube caption track; confirms where the words occur, not who speaks)
- Attribution uncertainty
- Elawady relays what a patient who owns a poultry farm told him; machine transcript.
- Claimed mechanism
Aminoglycoside residues cause nephro- and ototoxicity in consumers.
- Claimed health effect
Kidney damage, hearing loss.
- Population concerned
Consumers of chicken (Egypt)
- Geographic restriction by Elawady
Refers to farms 'that do not fear God' (some farms), apparently in Egypt.
Diverging source versions
انت بقى بتبلبع الجنتامايسين ده في الكبد والقوانص وفي لحمتها
- Source status
- Video transcript (own words)
- Attribution
- Elawady (machine transcript)
- Video
- Dr Diaa Al Awady د ضياء العوضي is live! الموت المفاجيء (Open source)
- Published
- 14 July 2025
- Timestamp
- 0:27:34 (location in the original video’s automatic YouTube caption track; confirms where the words occur, not who speaks)
- Attribution uncertainty
- Archive transcript (YouTube CC or AI-generated); wording may contain transcription errors; no timestamps; 'published' is the date listed by the archive. Passage read in context.
Scientific assessment
Mostly false – Essential parts of the statement are not supported by the evidence or are strongly exaggerated.
Certainty of evidence: low – Further research is likely to change the assessment considerably.
1. What was claimed?
Gentamicin injections in chicks lead to toxic residues in chicken.
2. What is demonstrably correct?
Gentamicin residues have been found in Egyptian chicken: 21% of 100 samples from Kafr El-Sheikh, highest in liver and gizzard, some above the limits the authors used (I-RES-101). Residues of other antibiotics are also common (I-RES-08). Gentamicin can damage kidneys and hearing when injected at therapeutic doses (I-RES-102).
3. What is wrong or exaggerated?
Food residues are not comparable to medical injections. Even the most contaminated raw liver gives about 3% of the safe daily intake per portion, and boiling removed 92-95% of gentamicin (I-RES-101). Swallowed gentamicin is essentially not absorbed (I-RES-102). There is no evidence that residues cause kidney or hearing damage.
4. What remains unclear?
How and when gentamicin is used in Egyptian hatcheries and farms; residue levels in other governorates; whether withdrawal periods are respected. Antibiotic resistance from such use is a separate, real concern (C-CHK-05).
5. Which studies support it?
I-RES-101 (gentamicin residues in Egyptian chicken; supports the use part only).
6. Which studies contradict it?
I-RES-102 (JECFA: ADI, poor oral absorption, toxicity at injected doses); I-RES-08 (hazard quotients far below 1 for other antibiotics).
7. What applies to Germany and Europe?
Residue limits and monitoring apply (I-RES-01, I-RES-07).
8. What is known about Egypt?
Gentamicin residues were detected in 21% of chicken samples in one governorate (I-RES-101); no national residue monitoring is published (the project's research files).
9. What practical conclusion is appropriate?
Antibiotic residues in Egyptian poultry are a real regulatory concern (and a resistance concern), but the claimed kidney and hearing damage from eating chicken is not supported; cooking reduces gentamicin residues strongly.
Assessment details
- Rationale for certainty of evidence
An Egyptian residue study (full text read) found gentamicin in 21% of 100 retail chicken samples, most often in liver (32%) and gizzard (20%), which partly supports the claimed use (I-RES-101). The health claim is implausible: the highest measured level (378.5 ng/g in raw liver) gives about 3% of the JECFA acceptable daily intake per 100 g portion and 0.15% after boiling; JECFA states that gentamicin is essentially not absorbed after oral administration; kidney and ear toxicity occur at injected therapeutic doses thousands of times higher (I-RES-102). Certainty is low because residue data come from one small local study and no outcome study exists.
- Source quality
Anecdote relayed from one patient.
- Regional transferability
Egypt-specific; EU: in the original 2010 Annex of Reg. 37/2010, gentamicin MRLs were listed only for bovine and porcine species (I-RES-01).
- Regional scope of the claim
- refers to Egypt
- Last reviewed
- 26 October 2026 provisional
Scientific evidence in detail
Overinterpreted – A real finding exists, but the claim draws more from it than the data allow (e.g. association taken as cause, animal data applied to humans, small effect presented as large).
Research question: Are Egyptian broiler chicks treated with gentamicin, do gentamicin residues occur in chicken meat/offal, and can such residues cause kidney damage or hearing loss in consumers?
Research question in detail (PECO)
- Population
- Egyptian consumers of chicken, liver and gizzards
- Intervention or exposure
- Gentamicin residues in chicken tissues
- Comparison
- Toxicological thresholds (ADI) and therapeutic doses
- Geographic scope
- Egypt-specific practice; universal pharmacology
- Outcomes
- gentamicin residue occurrence
- estimated intake vs ADI
- nephrotoxicity/ototoxicity
Study results as reported by the authors. Our assessment follows below.
What speaks for the claim?
Gentamicin found in one in five Egyptian chicken samples, mostly in liver
Kamouh HM et al.. Open Vet J 2024 · PMID 38633178 · DOI 10.5455/OVJ.2024.v14.i1.40 Measurement / residue studyfull text checkednewly addedEgyptian retail chicken residue survey (full text read).
- Actual result
- Gentamicin in 21% of samples (liver 32%, gizzard 20%, breast and thigh 16%); max 378.5 ng/g in liver; some above the (bovine-derived) MRLs.
- Methodological quality
- low (100 samples, one governorate)
- Relevance
- direct for occurrence
- Limitations
- Benchmark MRLs not specific to poultry; reporting inconsistencies.
What speaks against the claim?
WHO/FAO experts: gentamicin is hardly absorbed when swallowed
Joint FAO/WHO Expert Committee on Food Additives (JECFA). WHO Food Additives Series / INCHEM 1998 Risk assessmentfull text checkednewly addedJECFA evaluation and monograph.
- Actual result
- ADI 0-0.02 mg/kg bw; gentamicin 'essentially not absorbed after oral administration'; toxicity documented at i.v. doses of about 5.1 mg/kg bw/day.
- Methodological quality
- high (international risk assessment)
- Relevance
- direct for the health claim
- Limitations
- Older evaluation.
Antibiotic residues in Egyptian chicken
Noah SM et al.. Sci Rep 2026 · PMID 42527435 · DOI 10.1038/s41598-026-63227-2 Measurement / residue studyfull text, structured risk-of-bias assessmentEgyptian residue risk assessment for other antibiotics.
- Actual result
- Hazard quotients 0.0002-0.050 despite frequent MRL exceedances.
- Methodological quality
- moderate
- Relevance
- indirect (other antibiotics)
- Limitations
- Gentamicin not analysed.
What does the overall evidence say?
Editorial assessment based on the studies above – not itself a study result.
Which position is better supported?
Gentamicin residues do occur in Egyptian chicken, especially liver and gizzard, which partly supports the claimed practice; but residue intakes are a tiny fraction of the safe daily intake and thousands of times below therapeutic doses, and gentamicin is hardly absorbed when swallowed, so kidney or hearing damage from food is implausible.
Why some studies weigh more
International risk assessment and pharmacology outweigh the claim; the residue study supports only occurrence.
Is a causal relationship established? Not established No exposure-outcome data; pharmacology argues strongly against systemic toxicity from residues.
Remaining uncertainty
How gentamicin is used in Egyptian hatcheries (route, timing); extreme residue levels from illegal use without withdrawal periods; resistance selection (a separate, real concern).
Justified conclusion
Practice partly supported; health harm not supported.
Does this depend on the country?
- General biological effects
- Aminoglycoside pharmacology universal (poor oral absorption).
- Eating habits
- Liver and gizzard carry the highest residues; boiling reduced gentamicin by 92-95% (I-RES-101).
- Origin of the food
- Not relevant for EU-produced chicken.
- Contaminants
- Residue occurrence documented in one Egyptian governorate.
- National production conditions
- Egypt: no public national residue monitoring; no GOVS decision on withdrawal periods found (the project's research files).
- Legal rules
- EU MRLs for gentamicin listed for bovine and porcine species (I-RES-01); Egypt NFSA Decision 13/2020 follows Codex.
- Actual monitoring data
- Local studies only.
A regional difference is supported by robust data.
Statistical re-check
- Worst-case intake vs JECFA ADI and therapeutic dose – 100 g of the most contaminated raw liver: 37.9 ug = 3.15% of ADI (60 kg); after boiling 0.15%; therapeutic i.v. daily dose about 8,085 times higher. recalculated
Certainty of the overall evidence (GRADE, simplified)
- Main outcome
- Nephrotoxicity/ototoxicity from gentamicin residues in chicken
- Starting level
- high (randomised trials)
- Reasons for downgrading
- indirectness: no direct outcome studies; reasoning from exposure and pharmacology
- Result
- moderate
Simplified assessment by a single reviewer, following the GRADE approach; not a formal GRADE panel. GRADE rates the body of evidence for one outcome, not individual studies.
Clinical guidelines and official statements checked
- JECFA (FAO/WHO): Gentamicin: toxicological monograph (WHO FAS 34) and evaluation summary (1998) · Original publication
ADI 0-0.02 mg/kg bw; MRLs for cattle and pigs; gentamicin is essentially not absorbed after oral administration.
Search strategy
Documented literature searches for this review (search strings in the original database syntax).
| Database | Date | Search | Looking for | Hits | Included |
|---|---|---|---|---|---|
| Europe PMC | 26 October 2026 | (gentamicin) AND (hatchery OR "day-old chicks" OR "day-old chick" OR "in ovo") AND (injection OR injected) | supporting evidence | 384 | |
| PubMed | 26 October 2026 | gentamicin[tiab] AND residue*[tiab] AND (chicken[tiab] OR broiler*[tiab] OR poultry[tiab]) | supporting evidence | 19 | |
| Europe PMC | 26 October 2026 | (TITLE:"antimicrobial use" OR TITLE:"antimicrobial usage") AND (TITLE:broiler OR TITLE:chicken) AND (ABSTRACT:gentamicin) AND (ABSTRACT:hatchery) | supporting evidence | 0 | |
| Web search + INCHEM | 26 October 2026 | JECFA gentamicin ADI 0-20 ug/kg bw evaluation | contradicting evidence | 9 |
Open questions
Survey of gentamicin use in Egyptian hatcheries; confirmatory LC-MS/MS residue monitoring.
How deeply was this checked?
4 linked studies: 3 checked in full text (1 of them with a structured risk-of-bias assessment), 1 on the basis of the abstract, 0 bibliographically only. No formal assessment with two independent reviewers and no independent human expert review has taken place yet.
Last scientific review: 26 October 2026
History of the verdict
- 25 October 2026 · Phase 1 · Initial assessment: Potentially false (very low)
- 26 October 2026 · Phase 4 (systematic evidence review) · Verdict changed: Potentially false (very low) → Mostly false (low)
Changed: an Egyptian residue study (full text) now documents gentamicin in chicken, supporting the use part, while the exposure calculation against the JECFA ADI and the JECFA statement on negligible oral absorption make the claimed organ damage implausible. Overall certainty rises to low (practice data remain local and limited).
New sources: I-RES-101 I-RES-102
In plain language
Dr Elawady says some poultry farms inject chicks with the antibiotic gentamicin and that people then eat it and damage their kidneys and hearing. An Egyptian study did find gentamicin traces in about one in five chicken samples, mostly in liver and gizzards. But the amounts are tiny: even the most contaminated liver gives only about 3% of the safe daily amount, and boiling removes most of it. Gentamicin is also hardly absorbed when swallowed. Kidney and hearing damage is known from medical injections at much higher doses, not from food traces.
Studies on this claim
Studies supporting the claim (0)
No studies in this group.
Studies contradicting or limiting the claim (1)
-
WHO/FAO experts: gentamicin is hardly absorbed when swallowed
Joint FAO/WHO Expert Committee on Food Additives (JECFA). WHO Food Additives Series / INCHEM 1998Risk assessmentindependent cross-checkfull text checkedExperts set a safe daily intake of 0.02 mg/kg body weight and note that gentamicin is essentially not absorbed from the gut; kidney and ear damage were seen with injected medical doses.
Kidney and ear toxicity occur at injected therapeutic doses; gentamicin is essentially not absorbed orally and residues are judged against a low ADI.
Does the study support the specific claim? No · Methodological quality: high · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
What intake of gentamicin residues is safe for consumers?
- How was the study done?
International expert risk assessment of a veterinary drug residue
- How many people, animals or samples were studied?
not applicable
- What was actually found?
Summary (jec_897): ADI 0-0.02 mg/kg bw (latest evaluation 1998); MRLs (mg/kg) muscle and fat (cattle, pigs) 0.1, liver 2, kidney 5, milk 0.2. Monograph (FAS 34): 'Gentamicin, in common with other aminoglycosidic drugs, is poorly absorbed from the gastrointestinal tract'; 'aminoglycosides are essentially not absorbed after oral administration'. Human therapeutic data: about 1.7 mg/kg bw i.v. every 8 hours (5.1 mg/kg bw/day) produced nephrotoxicity in 8 (15%) patients and auditory toxicity in 3 (6%).
- How large was the observed effect?
Summary (jec_897): ADI 0-0.02 mg/kg bw (latest evaluation 1998); MRLs (mg/kg) muscle and fat (cattle, pigs) 0.1, liver 2, kidney 5, milk 0.2. Monograph (FAS 34): 'Gentamicin, in common with other aminoglycosidic drugs, is poorly absorbed from the gastrointestinal tract'; 'aminoglycosides are essentially not absorbed after oral administration'. Human therapeutic data: about 1.7 mg/kg bw i.v. every 8 hours (5.1 mg/kg bw/day) produced nephrotoxicity in 8 (15%) patients and auditory toxicity in 3 (6%).
- What do the results mean in everyday life?
Kidney and hearing damage come from medical injections, not from food traces.
- What are the study's limitations?
Older evaluation; MRLs set for cattle and pigs only
- What does it say about Elawady's specific claim?
Contradicts the health-harm part of the claim.
- Do the results apply to Germany and Europe?
Applies internationally.
- What can explicitly not be concluded from this study?
Does not address illegal very high residues.
No study in this group is marked as key.
Studies with mixed or unclear results (3)
-
EU limits for veterinary drug residues
European Commission. Official Journal of the EU 2010Guideline / position statementindependent cross-checkabstract checkedThe EU sets residue limits (e.g. emamectin 100 µg/kg in fish) and bans some drugs such as chloramphenicol and nitrofurans.
Does the study support the specific claim? Unclear · Methodological quality: high · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
Set MRLs.
- How was the study done?
Regulation.
- What was actually found?
MRLs and prohibitions.
- What do the results mean in everyday life?
Residues are legally limited.
- What are the study's limitations?
As-adopted text.
- What does it say about Elawady's specific claim?
Context.
- Do the results apply to Germany and Europe?
High.
-
Antibiotic residues in Egyptian chicken
Noah SM et al.. Sci Rep 2026 · PMID 42527435 · DOI 10.1038/s41598-026-63227-2Measurement / residue studyindependent cross-checkfull text, structured risk-of-bias assessment★ key studyMost chicken samples had antibiotic residues, often above legal limits, but estimated intake was far below harmful levels.
Does the study support the specific claim? Partly · Methodological quality: moderate · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
Measure residues.
- How was the study done?
HPLC.
- How many people, animals or samples were studied?
180 chicken samples (breast, thigh, liver) from shops in Mit Ghamr, Egypt.
- What was actually found?
Oxytetracycline in 72%, enrofloxacin in 52%, sulfadimidine in 17%; more than half of positives above legal limits; liver highest; hazard quotients at most 0.05.
- How large was the observed effect?
HQ <= 0.05.
- What do the results mean in everyday life?
Regulation problem, low direct risk.
- What are the study's limitations?
One town; no confirmatory mass-spectrometry; simple intake assumptions; gentamicin not tested.
- What does it say about Elawady's specific claim?
Partly supports residue concern; not harm.
- Do the results apply to Germany and Europe?
Low.
- What can explicitly not be concluded from this study?
Resistance effects; health harm; anything about gentamicin.
-
Gentamicin found in one in five Egyptian chicken samples, mostly in liver
Kamouh HM et al.. Open Vet J 2024 · PMID 38633178 · DOI 10.5455/OVJ.2024.v14.i1.40Measurement / residue studyindependent cross-checkfull text checked★ key study21% of samples contained gentamicin, most often liver and gizzard; boiling removed over 90%.
Gentamicin residues occur in Egyptian chicken (21% of samples, highest in liver and gizzard), supporting the use part; levels are far below toxic doses.
Does the study support the specific claim? Partly · Methodological quality: low · Certainty of evidence: see overall assessment of the claim
Original publication · Scientific details
Study explained simply
- What did the researchers want to find out?
How often are oxytetracycline, gentamicin and ciprofloxacin residues present in retail chicken in Egypt, and does boiling reduce them?
- How was the study done?
Cross-sectional residue survey (microbial inhibition test plus HPLC) with a boiling experiment
- How many people, animals or samples were studied?
100 samples (25 per tissue)
- What was actually found?
Positive: oxytetracycline 23%, gentamicin 21%, ciprofloxacin 17% of samples. Gentamicin by tissue: breast 16%, thigh 16%, gizzard 20%, liver 32%; mean concentrations (ng/g) 31.8, 52.5, 201.3, 243.2 (max liver 378.5). Above the MRL used: breast 1/25, thigh 2/25, gizzard 4/25, liver 5/25. Boiling 30 min reduced gentamicin by 91.8-95.2% (liver 378.5 -> 18.3 ng/g), oxytetracycline by 88.2% and ciprofloxacin by 23-31%.
- How large was the observed effect?
Positive: oxytetracycline 23%, gentamicin 21%, ciprofloxacin 17% of samples. Gentamicin by tissue: breast 16%, thigh 16%, gizzard 20%, liver 32%; mean concentrations (ng/g) 31.8, 52.5, 201.3, 243.2 (max liver 378.5). Above the MRL used: breast 1/25, thigh 2/25, gizzard 4/25, liver 5/25. Boiling 30 min reduced gentamicin by 91.8-95.2% (liver 378.5 -> 18.3 ng/g), oxytetracycline by 88.2% and ciprofloxacin by 23-31%.
- What do the results mean in everyday life?
Antibiotic traces are real in Egyptian chicken, especially in offal; cooking removes most gentamicin; the amounts are tiny compared with medical doses.
- What are the study's limitations?
Small sample from one governorate; Gentamicin MRLs taken from EU bovine/porcine values (EU 37/2010 lists gentamicin MRLs only for bovine and porcine species, I-RES-01); Inconsistent counts (21 MIT-positive vs 25 positive in Table 7 text); No dietary risk assessment
- What does it say about Elawady's specific claim?
Supports that gentamicin is used in Egyptian broilers; does not support kidney or hearing damage.
- Do the results apply to Germany and Europe?
Not applicable to EU production.
- What can explicitly not be concluded from this study?
Cannot show any health effect.
No study in this group is marked as key.
Regional context
Germany / EU
Residue limits and monitoring apply (I-RES-01, I-RES-07).
Egypt
Gentamicin residues were detected in 21% of chicken samples in one governorate (I-RES-101); no national residue monitoring is published (the project's research files).
- Food-safety governance and official controls
- Pesticide residues in fruit and vegetables on the EU/German market (incl. imports from Egypt)
- Pesticide residues in produce sold on the Egyptian domestic market
- Antibiotic (veterinary drug) residues in poultry meat and eggs
- Antimicrobial use in food animals and antibiotic growth promoters
- Hormones in poultry, meat, milk and farmed fish
- Salmonella in laying hens, eggs and broiler chicken
- Dioxins, PCBs and PFAS in eggs and other animal foods
- Aflatoxin M1 in milk and dairy products
- Aflatoxins in groundnuts (peanuts)
- Heavy metals in fish
- Farmed fish (aquaculture): drugs, water source and controls
- Import controls and the meaning of RASFF notifications for Egyptian products
What applies in my country?
General scientific assessment
Mostly false Gentamicin traces occur in Egyptian chicken, but at levels far too low to damage kidneys or hearing.
The following areas of food safety are relevant to this statement:
- Pesticides and pesticide residues
- Veterinary medicines and antibiotics
- Hormonal growth promoters
- Contaminants (heavy metals, PFAS, PCBs, dioxins, nitrate)
- Pathogens (Salmonella, Campylobacter, etc.)
- Animal husbandry and feed
- Controls, imports, recalls, labelling
Eggs · Poultry · Dairy · Fish and seafood · Red meat · Fruit and vegetables
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Limits: legal rules describe what is allowed, not what every single food contains. Measurement data come from samples and are meaningful only together with their method details.
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References
- JECFA: Gentamicin - toxicological monograph (WHO Food Additives Series 34) and JECFA evaluation summary (ADI 0-0.02 mg/kg bw, latest evaluation 1998). Joint FAO/WHO Expert Committee on Food Additives (JECFA). WHO Food Additives Series / INCHEM 1998
- Commission Regulation (EU) No 37/2010 of 22 December 2009 on pharmacologically active substances and their classification regarding maximum residue limits in foodstuffs of animal origin. European Commission. Official Journal of the EU 2010
- Health risk assessment of enrofloxacin, oxytetracycline, and sulfadimidine residues in broiler chicken carcasses marketed in Mit Ghamr, Egypt.. Noah SM et al.. Sci Rep 2026 · PMID 42527435 · DOI 10.1038/s41598-026-63227-2
- Assessment of antibiotic residues in chicken meat.. Kamouh HM et al.. Open Vet J 2024 · PMID 38633178 · DOI 10.5455/OVJ.2024.v14.i1.40