Bacteria 37 Congresses 13 Anaerobic bacteria 9 Pathogenic bacteria 9 Physiology 8 Microbiology 6 Bacteriology 5 Microorganisms 5 Metabolism 4 Sulphur bacteria 4 Viruses 4 Communicable diseases 3 Immunity 3 Infection 3 Medical bacteriology 3 Microbial metabolism 3 Morphology 3 Pathogenic microorganisms 3 Spores (Bacteria) 3 Adhesion 2 Bacteria, Aerobic 2 Bacteria, Autotrophic 2 Bacterial diseases of plants 2 Bacteriological techniques 2 Diagnosis, Laboratory 2 Genetics 2 Gram-negative bacteria 2 Immunology 2 Marine bacteria 2 Marine biology 2