Related by context. Frequent words. (Click for all words.) 85 microorganisms 82 organisms 81 bacteria 80 micro organisms 78 microbe 75 microbial 73 bacterium 69 organism 69 pathogens 69 bacterial 68 Bacteria 65 fungi 63 algae 62 biofilm 62 proteins 61 germs 61 prions 61 pathogen 60 enzymes 60 cyanobacteria 60 insects 59 organic molecules 59 organic compounds 59 molecules 58 nematodes 58 spores 57 phytoplankton 57 malaria parasite 57 plankton 57 viruses 57 parasites 57 harmful bacteria 56 nanoparticles 56 algal 55 larvae 55 chemical reactions 55 fungus 55 toxins 54 immune cells 54 mammals 54 tumor cells 54 parasite 54 germ 53 droplets 53 photosynthesis 53 contaminants 53 fungal 53 yeast 53 mites 53 particles 53 H. pylori 52 herbivores 52 macrophages 52 epithelial cells 52 nanotubes 52 invertebrates 52 amino acids 52 resistant bacteria 52 lipids 51 zebra mussels 51 humans 51 toxin 51 earthworms 51 amoeba 51 corals 51 chemical compounds 51 biosphere 50 pathogenic 50 secretions 50 molecule 50 aphids 50 sea creatures 50 mammalian 50 peptides 50 Viruses 50 creatures 50 snails 50 critters 50 influenza viruses 49 protein 49 bacterial infections 49 dust mites 49 cells 49 sediments 49 prion 48 flu viruses 48 allergens 48 nutrient rich 48 viral infections 48 mosquitoes 48 larval 48 insect 48 molecular 48 genes 48 Nanoparticles 48 intracellular 48 nutrients 48 enzyme 47 microscopic 47 Staphylococcus aureus 47 naturally occurring