The spread of antibiotic resistant "superbugs" are alarming scientists and health workers with the arrival of a new report says these bacteria are killing four people every hour in the United States.

"Some miracle drugs no longer perform miracles," reads the rather blunt report from the US Centers for Disease Control (CDC), which says that modern medicine is failing to catch up as the superbugs evolve to be impervious to the current generation of antibiotics.  

"This is a problem that ultimately affects all of us,” said Dr. Michael Craig, a CDC senior adviser on antibiotic resistance.  "It literally has the potential to affect every person on the planet."

The CDC report now lists five drug-resistant germs on its urgent list, up from three in 2013.  At the top is Clostridioides difficile, or C. diff, which kills 12,800 deaths a year in the United States.  That's followed by carbapenem-resistant Enterobacteriaceae, or CRE, and drug-resistant Neisseria gonorrhoeae, a sexually transmitted infection.  

Joining the list this year are carbapenem-resistant Acinetobacter; and a fungus, Candida auris.  

Fighting the antibiotic resistance crisis is not going to require new or more powerful antibiotics, according to the report.

"We need to adopt aggressive strategies that keep the germs away and infections from occurring in the first place," said CDC Director Dr. Robert Redfield.