Related by context. Frequent words. (Click for all words.) 79 parasites 69 bacterium 68 malaria parasite 66 pathogen 65 bacteria 63 organism 62 malaria parasites 62 virus 62 parasitic 61 fungus 60 tapeworm 60 larva 60 pathogens 60 larvae 59 bacterial 59 Salmonella bacteria 59 microbe 58 disease 58 herpes virus 58 microorganism 58 toxin 57 dengue virus 56 viruses 56 H. pylori 56 nematode 56 protozoa 56 retrovirus 56 organisms 55 insect 55 pathogenic 55 insects 55 larval 54 microorganisms 54 worm 54 mites 54 Parasites 54 microbes 54 influenza virus 54 Helicobacter pylori 54 Ebola virus 54 nematodes 54 micro organisms 54 pathogenic bacteria 54 flu virus 53 fleas 53 mosquitoes 53 infection 53 phage 53 worms 53 prions 53 aphid 53 genetic mutation 53 antibiotic resistant bacteria 52 bacterial infection 52 mosquito larvae 52 louse 52 S. aureus 52 fungal infection 52 fungal 52 zebra mussel 52 poliovirus 52 mutation 52 immune cells 51 amoeba 51 infect humans 51 mosquito 51 mosquitos 51 antibodies 51 Cryptosporidium 51 Chagas disease 51 aphids 51 wasp 51 Mycobacterium tuberculosis 51 Pseudomonas 51 midges 51 gut bacteria 51 germ 50 midge 50 fungal disease 50 retroviruses 50 pests 50 diseases 50 harmful bacteria 50 algae 50 TB bacteria 50 weevil 50 resistant bacteria 50 mutated gene 50 caterpillars 50 sleeping sickness 49 didymo 49 leishmaniasis 49 Epstein Barr virus 49 fungi 49 spores 49 polio virus 49 viral infections 49 beetle 49 infective 49 zebra mussels 49 infestation