'Last-Resort' Antibiotics Fail Against New Superbugs

Some bacteria have finally breached the last wall of humans' antibiotic stronghold, according to a new study from China. In the study, researchers found a gene in one strain of Escherichia coli (E. coli) that protects these bacteria against one of the antibiotics considered to be a last resort. The results are "extremely worrying," study author Jian-Hua Liu, a professor at South China Agricultural University in Guangzhou, said in a statement.