Taking out a child’s tonsils and adenoids, or the adenoids alone, to treat chronic middle-ear trouble offers only short-term and limited relief, says a study out Wednesday.

An emerging strain of community-acquired MRSA underscores the complexity of the public health challenges associated with antibiotic resistance.

The bacteria that cause pneumonia, meningitis and other serious illnesses are becoming increasingly resistant to penicillin, federal health officials said Thursday.