On semen analysis
any round cell will be counted as pus cell. Round cells can be either pus cells or immature sperms. To confirm the true nature, you need to do one test to differentiate pus cells from immature sperms (Endtz test). If its confirmed that those are indeed pus cells, you can do semen culture & sensitivity test & take antibiotics according to report to get rid of infection.
For infertility treatment
your wife also needs evalustion & treatment accordingly.
Wish you good health.