Thanks for using Healthcaremagic,
I have gone through all available details; you are suffering from resistant type of Urinary Tract infection
Hospital based micro organisms are some time resistant to multiple antibiotics.
Getting a good bacterial culture and sensitivity helps in knowing what drug would be effective.
You are taking Tysabri
so I presume suffering from MS (Multiple Sclerosis
) this drug can also weaken immune system so make more vulnerable for severe infection.
You should take plenty of fluids, good hygiene and appropriate antibiotics for sufficiently long periods may be 2 to 4 weeks.
We have seen many of the organisms are sensitive to older antibiotics which are in less use now your doctor would know that.
I hope you recover from infection soon.
Please take care.
Dr.Akhilesh Dubey M.D.