据外媒报道，9月9日美国疾病预防控制中心（CDC）表示，一名两岁女童被证实感染大肠杆菌类超级细菌，她已是第四名被诊断感染抗生素无效的美国人。
这名来自康乃狄克州的两岁女童，今年稍早被确诊为大肠杆菌。CDC星期五证实她使用“最后的抗生素”粘菌素（colistin）无效，成为美国第四位抗粘菌素的人。去年，中国、欧洲与加拿大相继在牲畜和人体内发现了带有MCR－1基因、可对抗多粘菌素的超级细菌。
部分原文报道如下：
Health officials have detected a potentially deadly superbug in a fourth US patient, the Centers for Disease Control and Prevention announced today. In July, scientists identified a strain of Escherichia coli that the antibiotic of last resort cannot treat in a Connecticut pediatric patient.
The girl had traveled to the Caribbean and developed fever and bloody diarrhea on June 12, two days before returning to the US. During the illness, the child made outpatient visits to a clinic and once to an emergency room, but did not require hospitalization.
相关链接：
http://www.upi.com/Health_News/2016/09/09/Fourth-case-of-drug-resistant-E-coli-found-in-Connecticut-child/8751473441639/?spt=sec&or=hn
http://www.cnn.com/2016/09/09/health/superbug-mcr1-connecticut-child/
日期：2016-09-12
