Prophages are newly described as important elements in competition between strains during colonization, as well as pathogenicity of the strains.Here we evaluate a difference in presence of pp4, pp1, and pp7 prophages and ASA (aggregation substance) gene expression in enterococcal isolates from renal transplant recipients (RTx) with different etiology of the end-stage renal failure.Prophages sequence was screened by PCR in strains of Enterococcus faecalis isolated from urine and feces of 19 RTx hospitalized at Medical University of Gdansk and 18 healthy volunteers. The gene discussed is PPEF1; the disease is stage 5 chronic kidney disease.