What are some problems that arise when a bacteria becomes resistant to an antibiotic?

Drug resistant bacteria are a major problem in hospitals. There are so many drugs and antibiotics being used that some strains of the bacteria find ways of becoming immune ( resistant to the chemicals)

Research indicates that the bacteria lose some of their DNA. The loss of the DNA weakens the bacteria but removes proteins and antigens that the antibiotic uses to attack the bacteria. These mutated bacteria are able to continue to reproduce even in the presence of the chemical antibiotics. An example is MRSA a strain of bacteria that has become resistant to most antibiotics.

Strains of bacteria that have become resistant to antibiotics removes one of medicines best weapons against disease causing bacteria.

Infections persist, increased mortality risk, longer illness duration, and higher healthcare costs are problems associated with antibiotic-resistant bacteria.