'Superbugs' found breeding in sewage plants

Terra Daily via SPX: Tests at two wastewater treatment plants in northern China revealed antibiotic-resistant bacteria were not only escaping purification but also breeding and spreading their dangerous cargo. Joint research by scientists from Rice, Nankai and Tianjin universities found "superbugs" carrying New Delhi Metallo-beta-lactamase (NDM-1), a multidrug-resistant gene first identified in India in 2010, in wastewater disinfected by chlorination.

They found significant levels of NDM-1 in the effluent released to the environment and even higher levels in dewatered sludge applied to soils. The study, led by Rice University environmental engineer Pedro Alvarez, appeared this month in the American Chemical Society journal Environmental Science and Technology Letters. "It's scary," Alvarez said.

"There's no antibiotic that can kill them. We only realized they exist just a little while ago when a Swedish man got infected in India, in New Delhi. Now, people are beginning to realize that more and more tourists trying to go to the upper waters of the Ganges River are getting these infections that cannot be treated. "We often think about sewage treatment plants as a way to protect us, to get rid of all of these disease-causing constituents in wastewater.

But it turns out these microbes are growing. They're eating sewage, so they proliferate. In one wastewater treatment plant, we had four to five of these superbugs coming out for every one that came in." Antibiotic-resistant bacteria have been raising alarms for years, particularly in hospital environments where public health officials fear they can be transferred from patient to patient and are very difficult to treat....

A white blood cell interacting with MRSA bacteria (an antibiotic resistant strain of staphylococcus aurea), National Institutes of Health