Your post does'nt mention specifics, but it appears that your father had a hip replacement that got infected in the post-op period. I am sorry about that. This is a well recognized complication. It typically requires several weeks of Antibiotics(6 weeks at least) when the bone is infected. As a first approach, this is reasonable. But if there is ongoing pain, discharge of pus, fever, an MRI of the Hip is indicated. If the MRI shows evidence of infection, the preferred approach is to remove the prosthesis, place a spacer in its place, treat with another course of I.V. antibiotics, and then consider a revision of the Hip replacement. Revisions are more technically challenging compared to primary replacements and it is recommended that you approach an orthopedist who is experienced. Good sterile precautions in the operating room are important. So, a good hospital is equally important as well. Hope this helps
--practicing physician in the U.S.