In the past 50 years, numerous polypeptide antibiotics have been identified mainly by bacterial production. These polypeptide antibiotics have been shown to have antibacterial activity against many bacteria specially gram positive bacteria. Some of these polypeptide antibiotics could also be used as growth promoter in poultry feed. This book also provides detailed information about production of bacitracin by Bacillus licheniformis. In this regard, systematic approach was adopted. In the first step, different isolates of Bacillus licheniformis were isolated from soil, milk and poultry...