Microbial chemical signals, or pheremones, have been found to mediate the regulation of diverse metabolic reactions and processes such as antibiotic production, pathogenesis, sexual conjugation, sporulation and differentiation. Their study has the potential to secure advances in our ability to control microbial processes to our benefit. This volume presents information at the forefront of knowledge in this exciting field and includes contributions on a range of organisms (both prokaryote and eukaryote, unicellular and multi-cellular) and signalling molecules. As such it will provide an invaluable resource for professional microbiologists and an excellent reference text for advanced students.