التحري عن النشاط التضادي لبكتريا Bacillus subtilus في نمو بعض الأحياء المجهرية المرضية

Abstract

Abstract: The study concluded the discovery and investigation of the ability of bacteria bacillus subtilus to produce the secondary metabolism ( antibiotic ) and to consider its activity in dampening the growth of pathogenic microorganism which is represented by (Klebsiella pneumonia , Escherichia coli , Pseudomonas aerogenosa , and Staphellococcus aureus) and fungi, yeast e.g. (Candida albicansg, Cryptococcus neoformans). We also used different consentration from CFU in the contrastive study . The activity increased to reach its maximum at the concentration 100 mg/ ml which has the ability to dampen all types of bacteria by diameters dampening which ranged from (0.9-20) mm , while the fungi and yest diameter damping which ranged from (18.6-30.2) mm. And also the value of MIC and MBC was specified.