Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Antibiotic resistance flourishes in freshwater systems

26.04.2012
Researchers discover resistance in freshwater systems throughout Ontario

The author Dr. Seuss may have been on to something when he imagined that microscopic communities could live and flourish on small specs of dust, barely visible to the naked eye. In fact, such vibrant communities exist – in a material with a Seussical sounding, yet scientific name called 'floc'.

McMaster University researchers have now discovered that floc – "goo-like" substances that occur suspended in water and that host large communities of bacteria – also contain high levels of antibiotic resistance.

"This has important public health implications because the more antibiotic resistance there is, the less effective our antibiotic arsenal is against infectious diseases," said Lesley Warren, the principal investigator for the study that looked at floc in different freshwater systems.

The research was led by Warren, professor of earth sciences and Gerry Wright, scientific director of the Michael G. DeGroote Institute for Infectious Disease Research, both of McMaster, along with Ian Droppo, a research scientist at Environment Canada.

They examined floc collected from Hamilton Harbour, which is impacted by sewer overflow; Sunnyside Beach in Toronto, which is impacted by wastewater; a rural stream near Guelph, impacted by light agricultural activities; and a remote lake in a natural preserve area in Algonquin Park, accessible only by float plane.

Researchers analyzed the water and floc samples for trace element concentrations and the presence of 54 antibiotic resistant genes.

They were surprised to discover that genes encoding resistance to clinically relevant antibiotics were present in floc bacteria at all four sites, although resistance varied in intensity based on human influence. That is, there was less antibiotic resistance detectable from Algonquin Lake compared to Hamilton Harbour, which harbored the highest concentration of floc trace elements.

"What this tells us is that antibiotic resistance is widespread in aquatic environments ranging from heavily impacted urban sites to remote areas," said Warren. "Yet, it also demonstrates that areas with greater human impact are important reservoirs for clinically important antibiotic resistance.

Floc are vibrant microbial communities that attract contaminants such as trace metals that are markers of resistance, Wright said.

Warren added the study of antibiotic resistance in floc has never been done, "and we are only scratching the surface. The presence of environmental bacterial communities in aquatic environments represents a significant, largely unknown source of antibiotic resistance," she said. "The better we understand what is out there, the better we can develop policies to safeguard human health as best we can."

The research has been published in the science journal Applied and Environmental Microbiology. Funding for the study was received from the Natural Sciences and Engineering Research Council of Canada and Environment Canada.

The paper and high rez photos are available at: http://fhs.mcmaster.ca/media/antibiotic_resistance_genes/

Veronica McGuire | EurekAlert!
Further information:
http://www.mcmaster.ca

More articles from Ecology, The Environment and Conservation:

nachricht Surface clean-up technology won't solve ocean plastic problem
04.08.2020 | University of Exeter

nachricht Improving the monitoring of ship emissions
03.08.2020 | Carl von Ossietzky-Universität Oldenburg

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

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

Im Focus: ScanCut project completed: laser cutting enables more intricate plug connector designs

Scientists at the Fraunhofer Institute for Laser Technology ILT have come up with a striking new addition to contact stamping technologies in the ERDF research project ScanCut. In collaboration with industry partners from North Rhine-Westphalia, the Aachen-based team of researchers developed a hybrid manufacturing process for the laser cutting of thin-walled metal strips. This new process makes it possible to fabricate even the tiniest details of contact parts in an eco-friendly, high-precision and efficient manner.

Plug connectors are tiny and, at first glance, unremarkable – yet modern vehicles would be unable to function without them. Several thousand plug connectors...

Im Focus: New Strategy Against Osteoporosis

An international research team has found a new approach that may be able to reduce bone loss in osteoporosis and maintain bone health.

Osteoporosis is the most common age-related bone disease which affects hundreds of millions of individuals worldwide. It is estimated that one in three women...

Im Focus: AI & single-cell genomics

New software predicts cell fate

Traditional single-cell sequencing methods help to reveal insights about cellular differences and functions - but they do this with static snapshots only...

Im Focus: TU Graz Researchers synthesize nanoparticles tailored for special applications

“Core-shell” clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient.

Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles – smallest...

Im Focus: Tailored light inspired by nature

An international research team with Prof. Cornelia Denz from the Institute of Applied Physics at the University of Münster develop for the first time light fields using caustics that do not change during propagation. With the new method, the physicists cleverly exploit light structures that can be seen in rainbows or when light is transmitted through drinking glasses.

Modern applications as high resolution microsopy or micro- or nanoscale material processing require customized laser beams that do not change during...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“Conference on Laser Polishing – LaP 2020”: The final touches for surfaces

23.07.2020 | Event News

Conference radar for cybersecurity

21.07.2020 | Event News

Contact Tracing Apps against COVID-19: German National Academy Leopoldina hosts international virtual panel discussion

07.07.2020 | Event News

 
Latest News

Rare Earth Elements in Norwegian Fjords?

06.08.2020 | Earth Sciences

Anode material for safe batteries with a long cycle life

06.08.2020 | Power and Electrical Engineering

Turning carbon dioxide into liquid fuel

06.08.2020 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>