Isolation and Characterization of Endophytic Bacteria Isolated from Legumes and Non-Legumes Plants in Egypt Maximization of chitosan production by Aspergillus niger on different culture conditions Enhancement of culture conditions for chitosan production by Rhizopus nigricans Comparison of Antibacterial Activity of Fungal Chitosan and Some Preservatives Against Some Foodborne Pathogenic Bacteria Soil biofilm formation enhances microbial community diversity and metabolic activity Effectiveness of endophytic bacteria combined with micronutrients on growth characteristics and productivity of faba bean Production of chitosan by surface and submerged fermentation from Aspergillus niger and Rhizopus nigricans