Related by context. Frequent words. (Click for all words.) 71 microorganism 67 bacterium 65 micro organisms 65 bacteria 64 microorganisms 63 microbe 63 naturally occurring bacteria 62 pathogenic organisms 61 anaerobic bacteria 61 organism 60 bacterial 60 pathogen 60 microbes 60 organisms 59 protozoan 59 alga 59 pathogens 58 phages 58 infectious organisms 57 bacterial toxins 57 fungi 56 coli 56 parasite 56 pathogenic bacteria 56 bacillus 56 bacterial strains 56 algae 56 mycobacteria 56 bacteriophage 56 bacterial spores 55 Bacillus 55 Toxoplasma 55 Clostridium 55 single celled organism 55 lectins 55 Mycobacterium 55 toxin 55 bacilli 55 parasitic worms 54 lactic acid bacteria 54 viruses 54 Streptococcus 54 Cryptosporidium 54 fungal spores 54 harmful pathogens 54 organic acids 54 duckweed 54 bacteriophages 54 Bacteria 54 Mycoplasma 54 bacteria fungi 53 avian flu viruses 53 E coli bacteria 53 Neu5Gc 53 protozoa 53 inoculum 53 Bt toxin 53 nitrogen fixing 53 phage 53 Klebsiella 52 parasites 52 microbial 52 Salmonella bacteria 52 malaria parasites 52 probiotic bacteria 52 bacterial strain 52 naturally occurring substance 52 cyanobacteria 52 E.coli bacteria 52 mutant strain 52 Aedes mosquito 52 Influenza viruses 52 Aspergillus 52 Plasmodium 52 malaria parasite 51 transgenic plants 51 single celled 51 fungus 51 Bacterium 51 Candida albicans 51 iron phosphate 51 fungal 51 Lactobacillus 51 algal 51 Wolbachia 51 lactobacillus 51 lentivirus 51 anthrax toxin 51 microscopic algae 51 E. coli bacterium 51 bacterial colonies 51 transgenes 51 Bti 51 S. pneumoniae 51 P. aeruginosa 51 harmful microbes 51 influenza virus 51 amoebae 50 avian influenza viruses 50 parasitic worm 50 chloroplasts