Health officials report an alarming increase in dangerous super bugs in U.S. hospitals.

The Centers for Disease Control and Prevention reports that in the first six months of last year nearly 200 U.S. hospitals saw at least one case.

Health officials call them "nightmare bacteria." The bacteria has been seen in 42 states and threatens to spread their resistance to other bacteria.

The director of the CDC said there's only a limited amount of time to stop the bacteria from spreading.