Micro-organisms 42 Micro organisms 35 Microbes 13 Microbiology 9 Micro organism 8 Bacteria 6 fungi 5 micro organisms 5 Ecology 4 Agricultural microbiology 3 Biology 3 Environmental microbiology 3 Algae 2 Antibiotics 2 Bacteriology 2 Biochemistry 2 Industrial microbiology 2 Micro-organism 2 Morphology 2 Plants 2 Protozoa 2 Soil fungi 2 metabolism 2 micro organism 2 micro-organisms 2 phytopathogenic micro organisms 2 soil micro organisms 2 Actinomycetes 1 Animal virus 1 Antibiogram 1