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You have got quite a big amount of dead sperms in your semen
and the reason can be pollution;smoking;alcohol;tobacco or any other habit;very hot working conditions so see if you are having any of these issues and try to stop smoking or any other bad habit.As for the bacteria
growth it is infection
and the sensitivity means that the indicated antibiotic
is better suited to treat the infection you have.So get treated and after the infection is treated the doctor may give you anti oxidant medicines like lycopene;co enzyme
Q10 ;ubicarnitine etc to improve the sperm condition.Please follow the doctors advice.