Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Antibiotic effectiveness imperiled as use in livestock expected to increase

27.03.2015

Antibiotic consumption in livestock worldwide could rise by 67 percent between 2010 and 2030, and possibly endanger the effectiveness of antimicrobials in humans, according to researchers from Princeton University, the International Livestock Research Institute, the Université Libre de Bruxelles and the Center for Disease Dynamics, Economics and Policy.

Five countries -- Brazil, Russia, India, China and South Africa -- will experience a growth of 99 percent in antibiotic consumption, compared with an expected 13 percent growth in their human populations over the same period, the study authors report in the journal Proceedings of the National Academy of Sciences. In the United States, antibiotic consumption in animals currently represents up to 80 percent of total antimicrobial sales.


Princeton University-led research found that antibiotic consumption in livestock worldwide could rise by 67 percent between 2010 and 2030, and possibly endanger the effectiveness of antimicrobials in humans. Pigs outpace chickens and cattle in estimates of antimicrobial consumption in countries in the Organization for Economic Co-operation and Development, which is a consortium of 34 nations that includes the United States and most of the European Union countries. The graph measures antibiotic consumption in milligrams (bottom bar) in cattle, chickens and pork per population correction unit, or PCU, which corresponds to 1 kilogram of the respective animal. The average amount of antibiotics increases from left to right. The researchers found that pigs could consume an average 172 mg of antibiotics per kilogram of animal compared to 148 mg for chickens and 45 mg for cattle.

Image courtesy of Thomas Van Boeckel, Department of Ecology and Evolutionary Biology

Because of the incredible volume involved, this increase in antimicrobial use in animals raises serious concerns about preserving antimicrobial effectiveness in the next decades, the researchers report. Global demand for animal protein is rising dramatically, and antimicrobials are used routinely in modern animal production for disease prevention and as growth promoters. The study focused on cattle, chickens and pigs, and identified the latter two as the main contributors to antibiotic consumption.

"The discovery and development of antibiotics was a major public health revolution of the 20th century," said senior author Ramanan Laxminarayan, a senior research scholar in the Princeton Environmental Institute. "Their effectiveness--and the lives of millions of people around the world -- are now in danger due to the increasing global problem of antibiotic resistance, which is being driven by antibiotic consumption."

The study is based on a limited data set of veterinary-antimicrobials sales from 32 countries, all with developed economies. Before now there has been no quantitative measurement of global antimicrobial consumption by livestock -- a critical component in assessing the potential consequences of widespread animal antibiotic use. Numerous studies have suggested links between the use of antimicrobials and antibiotic-resistant bacteria originating from livestock as well as their potential consequences for human health.

Two thirds, or 66 percent, of the projected global increase in antimicrobial consumption is due to the growing number of animals raised for food production. The remaining third is attributable to a shift in farming practices, with a larger proportion of animals projected to be raised in "intensive farming systems," or factory farms.

"For about a billion poor people, livestock are essential to survival," said Tim Robinson, principal scientist from the International Livestock Research Institute. "They are raising their livestock in extensive, backyard systems on the whole and do not use antibiotics as growth promoters or in disease prevention. They use them when their livestock are sick and will take a disproportionately high share of the consequences as effective drugs become more costly and less available in treating their livestock and themselves when they become sick."

Having reliable global data is essential for scientists and policymakers to both measure the extent of the problem and assess potential solutions, said lead author Thomas Van Boeckel, a Fulbright research scholar in Princeton's Department of Ecology and Evolutionary Biology.

"An important limiting factor in carrying out this first inventory of antibiotic consumption in animals was the lack of 'modeling-ready' data on veterinary antibiotic sales in many countries," Van Boeckel said. "Sometimes these data are simply not collected because of lack of veterinary surveillance programs, but sometimes the barriers are more political and or legislative. With this work we hope to trigger a momentum and show how useful such data could be to inform the design of global concerted policies against antimicrobial resistance."

"Antibiotic resistance is a dangerous and growing global public health threat that isn't showing any signs of slowing down," Laxminarayan said. "Our findings advance our understanding of the consequences of the rampant growth of livestock antibiotic use and its effects on human health--a crucial step towards addressing the problem of resistance."

###

In addition to Laxminarayan, Robinson and Van Boeckel, the research was conducted by Bryan Grenfell, the Kathryn Briger and Sarah Fenton Professor of Ecology and Evolutionary Biology and Public Affairs at the Woodrow Wilson School of Public and International Affairs; and Simon Levin, the George M. Moffett Professor of Biology and professor of ecology and evolutionary biology. In addition, two scholars from the Center for Disease Dynamics, Economics and Policy in Washington, D.C., were involved as well as Marius Gilbert from the Université Libre de Bruxelles.

The study, "Global trends in antimicrobial use in food animals," was published March 19 in Proceedings of the National Academy of Sciences. The research was funded through the U.S. Department of Homeland Security; the Organization for Economic Co-operation and Development; the Bill and Melinda Gates Foundation; the RAPIDD Program; the National Institutes of Health Fogarty International Center; and the Princeton University Grand Challenges Program.

Media Contact

Morgan Kelly
mgnkelly@princeton.edu
609-258-5729

 @Princeton

http://www.princeton.edu 

Morgan Kelly | EurekAlert!

More articles from Health and Medicine:

nachricht Why might reading make myopic?
18.07.2018 | Universitätsklinikum Tübingen

nachricht Unique brain 'fingerprint' can predict drug effectiveness
11.07.2018 | McGill University

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

Im Focus: Chemical reactions in the light of ultrashort X-ray pulses from free-electron lasers

Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.

Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

Machine-learning predicted a superhard and high-energy-density tungsten nitride

18.07.2018 | Materials Sciences

NYSCF researchers develop novel bioengineering technique for personalized bone grafts

18.07.2018 | Life Sciences

Why might reading make myopic?

18.07.2018 | Health and Medicine

VideoLinks
Science & Research
Overview of more VideoLinks >>>