Highest level of antibiotics found in Ghana's rivers

General News of Tuesday, 28 May 2019

Source: Graphic.com.gh

2019-05-28

Rivers around the world are contaminated with dangerous levels of antibiotics, according to a major new study. The study, led by researches from the University of York in the UK, found that concentrations of antibiotics in some waterways exceed safe levels by 300 times.

The researchers found that Ghana, Bangladesh, Kenya, Nigeria and Pastikan were home to the most contaminated rivers.

The researchers, who looked at 14 commonly used antibiotics in rivers flowing through 72 countries, found that the safe limits were most often exceeded in Asia and Africa.

However, sites in Europe, North America and South America also had high levels of contamination showing that antibiotic contamination was a "global problem".

Scientists fear antibiotics in rivers cause bacteria to develop resistance meaning they can not longer be used in medicines for humans. The AN estimates that the antibiotic resistance could kill 10 million people by 2050.

"Professor William Gaze," a microbial ecologist at the University of Exeter who was not involved in the study, told The Guardian.

Drugs get into rivers via human and animal waste, sources of waste.

In one site in Bangladesh, levels of metronidazole – which is used to treat mouth and skin infections – were 300 times greater than what is considered safe. The most common antibiotic was an urinary tract infection antibiotic called trimethoprim, which was present in 307 of 711 sites tested.

Professor Alistair Boxall, from the York Environmental Sustainability Institute, said: "The results are quite eye-opening and worrying, demonstrating the widespread contamination of systems around the world with antibiotic compounds.

Many scientists and policy makers now recognize the role of the natural environment in the antimicrobial resistance problem. Our data show that antibiotic contamination of rivers could be an important contributor.

"Solving the problem is going to be a mammoth challenge and will need investment in infrastructure for waste and wastewater treatment, tighter regulation and cleaning up of already contaminated sites."

Professor John Wilkinson, from the University of York, said: "Until now, the majority of environmental monitoring has been done in Europe, North America and China. Often on a handful of antibiotics. We know very little about the scale of problem globally.

"Our study helps fill this key gap with data being generated for countries that had never been monitored before."

The findings will be unveiled at the annual meeting of the Society of Environmental Toxicology and Chemistry in Helsinki on 27 and 28 May.