In this research study the capacity of Bacillus subtilus and Bacillus cereus isolated from soil to
inhibite the growth of pathogenic bacteria (Escherichia coli, Staphylococcus aureus , Klebsiella
pneumonia , Pseudomonas aeruginosa ) isolated from urinary tract infection by producing antibiotic
and study the effect of some environmental factors (temperature ,salt ,PH) on growth of bacteria .
the diameter of inhibition zone of B.subtilius was ( 25,30,22,19 ) while B.cereus was(18,15,20,11)
against E. coli, S. aureus, K. pneumonia, P.aeruginosa respectively. The result showed the ability of
B. cereus to growth etween 20-45 while subtilus growth etween 15-40 and showed the
optimum pH to growth of B. subtilus was7 while the optimum pH to growth of B. cereus was 5 The
result showed the B. subtilus was grown in 5% and 10% of Na l concentration while the B. cereus
was grown in 5% Na l concentration Concluded the ability of bacilli bacteria to produced
antibiotic inhibit the growth urinary tract infection bacteria .