But the tests showed that certain species of bacteria produce toxins that kill other bacteria, in one case even a particularly drug-resistant strain of E. coli, which can cause deadly diseases.

但是测试表明一些种类的细菌制造出能杀死其他细菌的毒素，其中一个测试甚至制造出一种抗药性的大肠杆菌，大肠杆菌能引发致命疾病。