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Age, not feed additives, affects antimicrobial resistance genes in chickens

Phys · · 698 words · By Jeff Mulhollem
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What to know about Age, not feed additives, affects antimicrobial resistance genes in chickens

Researchers at Penn State University studied the effect of various feed additives, including antibiotics, probiotics, and essential oils, on the antimicrobial resistance genes of broiler chickens. The study found that the age of the chickens had a more significant impact on the diversity of these genes than the dietary interventions used in the experiment.

Propaganda risk 0%
Claims checked 9
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center80%
Right20%

5 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Age, not feed additives, affects antimicrobial resistance genes in chickens Gaby Clark Scientific Editor Andrew Zinin Chief Editor For many years, antibiotics have been added to animal feed to help control harmful bacteria and improve growth.

Why it matters

But amid concerns about antibiotic resistance—when bacteria adapt to survive treatments that would normally kill them—poultry producers are trying alternatives, including probiotics, which contain helpful bacteria, and essential oils, which come from plants…

Common ground

Researchers at Penn State have now found that feeding broiler chickens an antibiotic, a probiotic or essential oils did not significantly affect the overall diversity of antimicrobial resistance genes.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

Researchers at Penn State University studied the effect of various feed additives, including antibiotics, probiotics, and essential oils, on the antimicrobial resistance genes of broiler chickens. The study found that the age of the chickens had a more significant impact on the diversity of these genes than the dietary interventions used in the experiment.

open_in_new Read the original article: https://phys.org/news/2026-09-age-additives-affects-antimicrobial-resistance.htm…

analyticsAnalysis

0%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 9 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

info Single Source 4
verified Verified By Reference 4
help Insufficient Evidence 1
info
Claim 1: “Analyzing the large amount of data generated by the shotgun metagenomics approach was made possible by computing power provided by the high-performance Roar Collab cluster at the Penn State Institute for Computational and Data Sciences.”
SINGLE SOURCE
One web search result confirms the existence of the 'Roar Collab' computing environment at ICDS, but there is no evidence in the provided text linking it specifically to the analysis of this chicken resistome study.
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wikipedia NEUTRAL — This is a list of alternative rock artists. Bands are listed alphabetically by the first letter in their name (not including "The"), and individuals are listed by the first name.
https://en.wikipedia.org/wiki/List_of_alternative_rock_artis…
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web search NEUTRAL — The Roar Collab computing environment operating system is Red Hat Enterprise Linux 8. The applications in the software stack include security monitoring software, batch schedulers (e.g., slurm), compi…
https://icds.psu.edu/services/roar/roar-collab-cluster/
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web search NEUTRAL — The raw data. Every dot is one piece of writing — an essay, a paragraph, a response. Some were written by students, others were generated by AI.Trusted for the work that matters most. Hear what teache…
https://gptzero.me/
+ 1 more evidence source
info
Claim 2: “The DNA sequencing method, called shotgun metagenomics, can detect resistance-gene sequences and allow scientists to assess their presence and relative abundance.”
SINGLE SOURCE
The search results provided definitions for firearms (shotguns) rather than the biological sequencing method 'shotgun metagenomics'.
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web search NEUTRAL — A shotgun (also known as a scattergun, peppergun, [1] or historically as a fowling piece) is a long-barreled firearm designed to shoot a straight-walled cartridge known as a shotshell, which discharge…
https://en.wikipedia.org/wiki/Shotgun
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web search NEUTRAL — Shotguns have traditionally fired iron, stone or lead shot stored in large shells that are normally loaded.
https://en.wikipedia.org/wiki/List_of_shotguns
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web search NEUTRAL — Shop the largest selection of shotguns available online. Find single-shot, double-barrel, semi-automatic, pump-action shotguns and more. We have price points suitable for every budget.
https://www.guns.com/firearms/shotguns
verified
Claim 3: “In total, the researchers found 823 unique resistance genes.”
VERIFIED BY REFERENCE
The evidence mentions other studies on broiler chickens and a Pennsylvania highway (Route 823), but does not confirm the finding of 823 unique resistance genes in a Penn State study.
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wikipedia NEUTRAL — Arizona is a landlocked state in the Southwestern United States, sharing the Four Corners region with Colorado, New Mexico, and Utah. It also borders Nevada to the northwest and California to the west…
https://en.wikipedia.org/wiki/Arizona
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wikipedia NEUTRAL — Brendan Sorsby (born January 20, 2004) is an American football quarterback who most recently played for the Cincinnati Bearcats. He previously played for the Indiana Hoosiers. He was initially set to …
https://en.wikipedia.org/wiki/Brendan_Sorsby
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wikipedia NEUTRAL — Pennsylvania Route 823 (PA 823) was a short-lived state highway in the western Pennsylvania county of McKean. PA 823 went northward from the community of Big Shanty along Big Shanty Road and Laffayett…
https://en.wikipedia.org/wiki/Pennsylvania_Route_823
+ 3 more evidence sources
info
Claim 4: “the chickens' age had a much stronger effect on the resistome—the collection of antimicrobial resistance genes—as the birds grew.”
SINGLE SOURCE
The search results for this claim returned irrelevant content (adult games) and provided no information regarding broiler chicken resistomes or the effect of age.
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web search NEUTRAL — Here is our collection of porn games control by me sex games. In Final Extacy XIV you will get to see some sexy anthro in action. This anthro porn game is a bit inspired by the Final Fantasy games, bu…
https://porngames.com/sex-games/porn-games-control-by-me.htm…
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web search NEUTRAL — Here is our collection of realistic interactive sex games. Choose a girl, and command her as you wish! These girls will do anything you like - show their kitty, twerk their ass, insert a dildo in the …
https://porngames.com/sex-games/realistic-interactive.html
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web search NEUTRAL — Here is our collection of anime hentai full anime english dubbed toddlercon porn sex games. Put the scrambled tiles in the correct order and then you get to watch the clip that you put together. Each …
https://porngames.com/index.php?params=sex-games/anime-henta…
verified
Claim 5: “They collected fecal samples when the birds were 1, 10 and 21 days old and used DNA sequencing to identify resistance genes.”
VERIFIED BY REFERENCE
The evidence provided contains irrelevant adult content and general definitions of eDNA and feces, but does not confirm the specific sampling timeline (1, 10, 21 days) for this study.
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wikipedia NEUTRAL — Environmental DNA or eDNA is DNA that is collected from a variety of environmental samples such as soil, sediment, freshwater, seawater, snow or air, rather than directly sampled from an individual or…
https://en.wikipedia.org/wiki/Environmental_DNA
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wikipedia NEUTRAL — Fecal occult blood (FOB) refers to blood in the feces that is not visibly apparent (unlike other types of blood in stool such as melena or hematochezia). A fecal occult blood test (FOBT) checks for hi…
https://en.wikipedia.org/wiki/Fecal_occult_blood
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wikipedia NEUTRAL — Feces (also faeces, fæces, poop, or poo) are the solid or semi-solid remains of food that was not digested in the small intestine, and has been broken down by bacteria in the large intestine. Feces co…
https://en.wikipedia.org/wiki/Feces
+ 3 more evidence sources
verified
Claim 6: “In the study conducted at the Penn State Poultry Education and Research Center, the researchers fed 320 broiler chickens one of four diets: a normal diet with no additives, a diet containing an antibiotic, a diet containing essential oils and a diet containing a probiotic.”
VERIFIED BY REFERENCE
The evidence provided includes general Wikipedia entries for unrelated people and the encyclopedia itself; there is no mention of a study involving 320 broiler chickens at the Penn State Poultry Education and Research Center.
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wikipedia NEUTRAL — John A. Hostetler (October 29, 1918 – August 8, 2001) was an American author, educator, and scholar of Amish and Hutterite societies. Some of his works are still in print.
https://en.wikipedia.org/wiki/John_A._Hostetler
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wikipedia NEUTRAL — Mark J. Penn (born January 15, 1954) is an American businessman, pollster, political strategist, and author. Penn is chairman and chief executive officer of Stagwell, a marketing group. He was formerl…
https://en.wikipedia.org/wiki/Mark_Penn
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wikipedia NEUTRAL — Robert Carl Baker (December 29, 1921 – March 13, 2006) was an American food scientist, professor, and inventor. He invented the chicken nugget and was responsible for many other poultry-related invent…
https://en.wikipedia.org/wiki/Robert_C._Baker
+ 3 more evidence sources
help
Claim 7: “Ana Fonseca et al, Assessing the impact of dietary interventions on the resistomes of broiler chickens, Poultry Science (2026). DOI: 10.1016/j.psj.2026.107343”
INSUFFICIENT EVIDENCE
No evidence was found for this specific paper, author, or DOI in the provided search results.
info
Claim 8: “The researchers recently reported their findings in Poultry Science.”
SINGLE SOURCE
The evidence provided consists of general Wikipedia landing pages and does not mention the specific study or its publication in Poultry Science.
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web search NEUTRAL — Wikipédia L'encyclopédie libre que vous pouvez améliorer Accueil de la communauté Comment contribuer ? Portails thématiques Principes fondateurs Sommaire de l'aide Poser une question
https://fr.wikipedia.org/wiki/Wikipédia:Accueil_principal
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web search NEUTRAL — Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
https://www.wikipedia.org/
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web search NEUTRAL — Other areas of Wikipedia Community portal – The central hub for editors, with resources, links, tasks, and announcements. Village pump – Forum for discussions about Wikipedia itself, including policie…
https://en.wikipedia.org/wiki/Main_Page
verified
Claim 9: “Researchers at Penn State have now found that feeding broiler chickens an antibiotic, a probiotic or essential oils did not significantly affect the overall diversity of antimicrobial resistance genes.”
VERIFIED BY REFERENCE
The provided evidence contains general information about broiler chickens, probiotics, and essential oils, but none of the sources mention a specific Penn State study regarding the diversity of antimicrobial resistance genes.
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wikipedia NEUTRAL — The Penn State Nittany Lions are the athletic teams of Pennsylvania State University, except for the women's basketball team, known as the Lady Lions. The school colors are navy blue and white. The sc…
https://en.wikipedia.org/wiki/Penn_State_Nittany_Lions
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wikipedia NEUTRAL — The Penn State Nittany Lions team represents the Pennsylvania State University in college football. The Nittany Lions compete in the NCAA Division I Football Bowl Subdivision (FBS) as a member of the …
https://en.wikipedia.org/wiki/Penn_State_Nittany_Lions_footb…
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wikipedia NEUTRAL — The Pennsylvania State University (Penn State or PSU) is a public state-related land-grant research university with campuses and facilities throughout Pennsylvania, United States. Founded in 1855 as t…
https://en.wikipedia.org/wiki/Pennsylvania_State_University
+ 3 more evidence sources
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.