Prostatisis. To check prostate cancer?

I am attaching two images of my latest reports for analysis. Urine flow is very nice. But not getting relief even at heavy consumption of water and ultimate urinations except ejaculation or temporary use of catheter. No organism in urine culture everytime but growth of organisms in every seminal culture. One local nephrologist examined last semen culture and suggested that, blood circulation cannot reach easily prostate gland like other organ. Hence he advised linezolid 600 mg twice daily for 15 days against Staphylococcus aureus. Now I am following his advice. My recent kidney function test is normal. Nothing detected in repeated cystoscopy other than ultrasound. One local junior urologist suggested that, growth of Staphylococcus aureus is not possible in fluid other than skin. But I have read possibility of 68.2 % infection of Staphylococcus aureus in seminal fluid. Shall I do cystoscopy again to check prostate cancer ?