ISLAMABAD: Besides treating bacterial infections, some antibiotics may also give rise to harmful new bacteria, research suggests.
“For a long time we have thought that bacteria make antibiotics for the same reasons that we love them – because they kill other bacteria,” said Elizabeth Shank, assistant professor of biology at University of North Carolina at Chapel Hill.
“However, we have also known that antibiotics can sometimes have pesky side-effects, like stimulating biofilm formation,” Shank added.
The researchers have now shown that this side-effect – the production of biofilms – is not a side-effect after all, suggesting that bacteria may have evolved to produce antibiotics in order to produce biofilms and not only for their killing abilities, said a study appeared in the journal Proceedings of the National Academy of Sciences.
Biofilms are communities of bacteria that form on surfaces, a phenomenon dentists usually refer to as plaque. Biofilms are everywhere.
In many cases, biofilms can be beneficial, such as when they protect plant roots from pathogens. But they can also harm, for instance when they form on medical catheters or feeding tubes in patients, causing disease.