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A study done in Ashoka Trust for Research in Ecology and the Environment (ATREE), lead by researcher Priyanka Jamwal showed a combination of industry effluents, rampant use of antibiotics and raw sewage may be the cause for certain types of bacteria developing resistance to drugs in the severely-pollutedBellandur lake.

It also showed that bacteria had developed more resistance to more drugs in Bellandur lake compared to the relatively-cleaner waters of Jakkur lake. They had compared 10 bacteria species with 10 commonly used antibiotics found in the city’s lakes.

Bellandur had 14 cases of increased bacteria-drug resistance as compared to Jakkur. There is a real possibility of infection or outbreak of diseases in the community,

In a comparison of 10 bacterial species with 10 common antibiotics, researchers found that in Jakkur lake, bacteria had developed resistance in 37 cases; that is, each bacteria species developed resistance to between one and six antibiotic drugs. However, in Bellandur, this number goes up to 51.

Bacteria have almost universally developed resistance to drugs such as amoxcillin and cefoperazone, which is seen in the figures for Jakkur and Bellandur. But it is the variation of the other drugs that is a concern.

Take for instance, Citrobacter species, which can cause a wide spectrum of infections from urinary tract to the respiratory tract, has resistance to six drugs in Jakkur lake. At Bellandur, it has resistance to eight drugs. Klebsiella, which can cause pneumonia, has seen resistance to seven drugs in Bellandur, compared to five in Jakkur.

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