Related by context. All words. (Click for frequent words.) 84 E. coli 73 E coli bacteria 73 E.coli 71 E coli 71 bacteria 70 E.coli bacteria 70 E. Coli 69 E. Coli bacteria 68 Salmonella bacteria 67 e coli 67 fecal bacteria 66 E. coli contamination 66 Salmonella 66 salmonella 65 e coli bacteria 65 bacterial contamination 65 salmonella bacteria 64 Listeria bacteria 64 fecal coliform bacteria 63 listeria 63 coli 63 bacterium 63 enterococcus 62 coliform bacteria 62 Listeria monocytogenes bacteria 62 E. coli strain 62 E.Coli 62 fecal coliform 61 E coli O# 61 enterococcus bacteria 61 Listeria monocytogenes 61 bacterial 61 E. coli O# H7 61 E.coli contamination 61 listeria bacteria 60 coliform 60 e.coli 60 Coliform bacteria 60 harmful bacteria 60 enterococci 60 enterococci bacteria 60 Listeria 59 E Coli 59 toxin 59 fecal contamination 59 listeria monocytogenes 59 Enterococcus bacteria 59 coliforms 58 salmonella bacterium 58 e.Coli 58 algal toxins 58 coli bacteria 57 salmonella contamination 57 bacteria listeria monocytogenes 57 bacterium Listeria monocytogenes 57 total coliform 57 cryptosporidium 57 E. coli outbreak 57 parasite cryptosporidium 57 cryptosporidiosis 57 E.Coli bacteria 57 cryptosporidium parasite 57 norovirus 57 Bacteria 57 E Coli bacteria 56 salmonella poisoning 56 E. Coli contamination 56 E. coli infection 56 Escherichia coli bacteria 56 O# H7 56 Salmonella typhimurium 56 salmonella infection 56 Campylobacter bacteria 56 toxic algae 56 bacterium E. coli 56 Fecal bacteria 56 Legionella bacteria 56 shigella bacteria 56 contaminant 56 e.coli bacteria 56 contaminated 56 Shigella bacteria 56 contaminants 55 E. coli bacterium 55 Cryptosporidium 55 legionella bacteria 55 salmonella enteritidis 55 microcystin 55 bacteria Listeria monocytogenes 55 E. coli O# [001] 55 E. coli O# [002] 55 E coli contamination 55 E.coli O# H7 55 fecal coliforms 55 O# strain 55 contamination 55 multistate outbreak 55 Salmonella poisoning 55 Listeria monocytogenes bacterium 55 foodborne pathogen 55 Salmonella contamination 54 E. coli infections 54 Enterococcus 54 cyanobacteria 54 Salmonella saintpaul 54 arsenic 54 pathogen 54 EHEC 54 listeria monocytogenes bacteria 54 Salmonella enteritidis 54 prions 54 pathogens 54 E. Coli outbreak 54 Salmonella infection 54 Ecoli 54 microcystins 54 enteric bacteria 54 naturally occurring bacteria 53 Fecal coliform 53 Campylobacter 53 botulism 53 staphylococcus bacteria 53 Coliform 53 fecal coliform contamination 53 Salmonella Saintpaul strain 53 E. coli outbreaks 53 avian botulism 53 e coli contamination 53 antibiotic resistant bacteria 53 bacterial infection 53 listeria bacterium 53 algae 53 salmonella outbreak 53 Salmonella Enteritidis 53 fresh bagged spinach 53 flu virus 53 Salmonella Typhimurium 53 Microcystis 53 E coli outbreak 53 salmonellosis 53 Escherichia coli 53 staph bacteria 53 O# H7 strain 52 PFBA 52 disinfection byproducts 52 Shigella 52 THMs 52 salmonella typhimurium 52 tainted spinach 52 Cryptosporidium parasite 52 arsenic concentrations 52 campylobacter 52 anthrax bacteria 52 saxitoxin 52 Legionella bacterium 52 Salmonella Saintpaul 52 Bacillus cereus 52 parasite Cryptosporidium 52 TTHMs 52 salmonella strain 52 Salmonella outbreaks 52 Staphylococcus aureus bacterium 52 bacterium Staphylococcus aureus 52 Serratia marcescens 52 shigella 52 marine biotoxin 52 Salmonella Enteritidis SE 52 trichloroethene 52 bacterias 52 Enterococci 52 domoic acid 52 faecal contamination 52 possible salmonella contamination 51 ecoli 51 bagged spinach 51 Fecal coliform bacteria 51 H7 virus 51 naturally occurring arsenic 51 botulism outbreak 51 nitrates 51 chlorine disinfectant 51 noroviruses 51 avian flu viruses 51 Shiranui Sea 51 biotoxin 51 toxic algae bloom 51 bromate 51 Clostridium botulinum bacterium 51 borne illness 51 harmful pathogens 51 salmonellosis outbreak 51 Enterococci bacteria 51 Naegleria fowleri 51 Legionnaires disease 51 infectious prions 51 bacteriological contamination 51 swine flu virus 51 food borne pathogen 51 tetrachlorethylene 51 Hydrogen sulfide 51 Salmonella outbreak 51 West Nile virus 51 algal toxin 51 salmonella infections 51 C. difficile bacteria 51 abnormal prions 51 Legionnaire disease 50 avian influenza virus 50 HAAs 50 TB bacteria 50 meningococcal bacteria 50 Salmonella infections 50 toxins 50 microscopic parasite 50 shigellosis 50 Cryptosporidiosis 50 highly pathogenic virus 50 undercooked hamburger 50 Salmonella bacterium 50 Acanthamoeba 50 pathogenic E. coli 50 raw alfalfa sprouts 50 trihalomethanes 50 vibrio parahaemolyticus bacteria 50 campylobacter bacteria 50 E.coli bug 50 Escherichia coli O# H7 50 haloacetic acids 50 Noro virus 50 MRSA bacteria 50 serrano peppers 50 mold spores 50 Salmonella Saintpaul outbreak 50 L. monocytogenes 50 methyl mercury 50 Pseudomonas aeruginosa bacteria 50 Listeria contamination 50 bacteria enterococci 50 listeria outbreak 50 Staph bacteria 50 bacterial strain 50 Zebra mussels 50 dioxin 49 staphylococcus aureus 49 E. coli STEC 49 chlordane 49 toxic algae blooms 49 monocytogenes 49 H7 bacteria 49 gastrointestinal illness 49 bacterial spores 49 algal bloom 49 botulism toxin 49 clostridium botulinum 49 bacterial pathogen 49 food borne illnesses 49 Listeria Monocytogenes 49 nitrate contamination 49 staph 49 listeria contamination 49 amoeba Naegleria fowleri 49 microcystis 49 Eastern equine encephalitis 49 vibrio 49 disinfectant byproducts 49 waterborne parasite 49 faecal bacteria 49 Vibrio vulnificus 49 Staphylococcus aureus bacteria 49 opportunistic pathogens 49 bacterial meningitis 49 undercooked beef 49 Clostridium botulinum 49 chloramines 49 total coliforms 49 Vitamin Cottage peanut butter 49 amoeba 49 norovirus outbreaks 49 Pfiesteria 49 radioactive isotope iodine 49 fusarium fungus 49 prepackaged spinach 49 alfalfa sprouts 49 bacterial toxin 49 fecal chloroform 49 Karenia brevis 49 H#N# virus 49 bacterial strains 49 enterohaemorrhagic E. coli 49 algae blooms 49 Listeriosis 49 harmful contaminants 49 ciguatera 48 cyclospora 48 E. coli strains 48 Staph infection 48 EEE virus 48 Naegleria 48 Cryptosporidium parvum 48 Vibrio 48 foodborne outbreaks 48 Escherichia coli E. coli 48 arsenic contamination 48 bacteria Clostridium botulinum 48 Bovine tuberculosis 48 listeria salmonella 48 E.coli O# 48 microorganism 48 microbiological contamination 48 clover sprouts 48 Streptococcus pneumoniae bacteria 48 foodborne bacteria 48 salmonellosis outbreaks 48 hydrogen sulfide 48 aflatoxin 48 tetrachloroethene 48 botulism poisoning 48 Vesivirus 48 raccoon feces 48 deadly bacterium 48 H7 contamination 48 DBPs 48 pathogen E. coli 48 Cyclospora 48 food borne pathogens 48 rodent poison aminopterin 48 Salmonellosis 48 MRSA 48 chemical diethylene glycol 48 remote blackwater streams 48 hemolytic uremic syndrome 48 legionella bacterium 48 salmonella serotype 48 salmonella E. coli 48 Domoic acid 48 pesticide residue 48 zebra mussels 48 bacterium Listeria 48 misshapen protein 48 Staphylococci 48 microscopic parasites 48 aspergillus 48 bacteria Escherichia coli 48 Shigellosis 48 vibriosis 48 Typhimurium 48 stachybotrys 48 legionella bug 48 chlorine disinfection 48 Salmonella serotype 48 antibiotic resistant staph infection 48 fecal matter 48 Algae blooms 48 microscopic algae 48 dioxins 48 mosquito borne virus 48 B. cepacia 48 nitrate 48 faecal coliforms 48 EHEC bacteria 48 V. parahaemolyticus 48 Klebsiella bacteria 48 infected mosquitoes 47 perfluorochemicals 47 naturally occurring bacterium 47 ciguatera toxin 47 chlorine byproducts 47 Salmonella enterica 47 norovirus outbreak 47 #,# dioxane 47 salmonella montevideo 47 tetrachlorethylene PCE 47 virus 47 E.Coli outbreak 47 Dole Earthbound Farm 47 suspected carcinogen 47 E. Coli O# H7 47 pathogenic bird flu 47 Neu5Gc 47 allergenic proteins 47 E. coli bacterial infections 47 C. perfringens 47 P. mirabilis 47 injectable heparin 47 legionnaires disease 47 pathogenic strains 47 Tainted spinach 47 bacterium Clostridium 47 trace amounts 47 pathogenic microbes 47 Bacterial contamination 47 listeriosis 47 swimmer itch 47 Vibrio parahaemolyticus 47 aflatoxin naturally occurring 47 bacterial contaminants 47 harmful microorganisms 47 nitrate concentrations 47 Saintpaul 47 contaminate shellfish 47 Listeria bacterium 47 pfiesteria 47 B. anthracis 47 highly pathogenic bird flu 47 spores 47 turbidity 47 e Coli 47 causes Legionnaire disease 47 Shiga toxin 47 perfringens 47 toxaphene 47 E.coli outbreak 47 influenza virus 47 Total Coliform 47 trichlorethylene TCE 47 mosquito borne illness 47 H7 strain 47 Harmful bacteria 47 enteroviruses 47 estrogenic compounds 47 trihalomethane 47 fungus 47 contaminated celery 47 Banquet pot pies 47 West Nile Virus 47 bird flu virus 47 naturally occurring toxin 47 oysters harvested 47 H#N#virus 47 patulin 47 pseudomonas aeruginosa 47 coliform contamination 47 toxin microcystin 47 Vancomycin resistant 47 H. pylori 47 faecal coliform 47 pseudomonas 47 Cyanobacteria 47 CRKP 47 MRSA infection 47 microbial contamination 47 highly contagious norovirus 47 germs 47 anthrax spores 47 PAHs 47 measles virus 47 organism 47 microorganisms 46 bacterium Escherichia coli 46 naturally occurring hormones 46 Bacillus anthracis spores 46 foodborne illness 46 radium naturally occurring 46 algae bloom 46 Stachybotrys 46 pesticide residues 46 invasive zebra mussels 46 Anabaena 46 Salmonella montevideo 46 Norovirus 46 Streptococcus salivarius 46 causes Legionnaires disease 46 Enteritidis 46 legionella 46 carcinogenic dioxins 46 waterborne pathogens 46 equine herpes virus 46 dioxane 46 e coli outbreak 46 staph infections 46 Enterobacter 46 infectious organisms 46 bacterium Clostridium difficile 46 dieldrin 46 C. sordellii 46 pandemic H#N# virus 46 gastrointestinal illnesses 46 parasite 46 diarrhea abdominal cramps nausea 46 salmonella outbreaks 46 viral hemorrhagic septicemia 46 Didymo 46 Antibiotic resistant bacteria 46 perchlorate 46 Rat poison 46 C. difficile 46 carcinogen benzene 46 Tularemia 46 vibrio bacteria 46 possible listeria contamination 46 Dehalococcoides 46 golden alga 46 foodborne pathogens 46 Salmonella E. coli 46 Enterobacter sakazakii 46 chlorine residuals 46 microbiological organisms 46 triclocarban 46 foodborne diseases 46 oversulfated chondroitin sulfate OSCS 46 mycotoxins 46 pathogenic bacteria 46 polychlorinated biphenyls PCBs 46 IgG antibodies 46 naturally occurring algae 46 perfluorochemicals PFCs 46 campylobacter jejuni 46 Legionnaire Disease 46 OSCS 46 undercooked contaminated 46 S. aureus 46 LCMV 46 Fecal Coliform 46 noro virus 46 Propyl mercaptan 46 Salmonella Montevideo 46 drinking unpasteurized milk 46 infected cow 46 staphylococci 46 PRRS virus 46 staphylococcus aureus bacteria 46 pathogenic 46 Toxin 46 Saintpaul strain 46 intestinal infections 46 pesticide methamidophos 46 bacterium Bacillus anthracis 46 cyanobacteria blooms 46 bacterium Vibrio cholerae 46 spoilage bacteria 46 hexavalent chromium 46 invasive mussels 46 Salmonella Listeria 46 salmonella typhi 46 H7 46 chlorine residual 46 groundwater contamination 46 Thoroughly cooking eggs 46 causes botulism 46 bacterium Salmonella 46 Pathogenic bacteria 46 microbes 46 diarrheal illness 46 vibrio parahaemolyticus 46 Intersex fish 46 eastern equine encephalitis 46 Coliforms 46 radioactive tritium 46 cow rumen Naczi 46 deadly toxin 46 frozen patties 46 Toxic algae 46 phosphine gas 46 E. coli salmonella 46 Elevated mercury 46 ground beef patties 46 Clostridium sordellii 46 antibiotic resistant 46 infectious prion proteins 46 S. enterica 46 S. enteritidis 46 salmonella listeria 46 avian flu virus 46 typhimurium 46 hantavirus 46 undercooked eggs 46 trihalomethanes THMs 45 beryllium dust 45 organisms 45 scorpion toxin 45 Shiga toxin producing 45 microbe 45 PVL toxin 45 vibrio vulnificus 45 TCE vapors 45 staph germs 45 intestinal bacteria 45 eating undercooked meat 45 paralytic shellfish poisoning 45 microbiological sampling 45 radioactive cesium 45 Viral Hemorrhagic Septicemia 45 rock snot 45 chlorine 45 fecal material 45 Legionella 45 clostridium perfringens 45 nitrite 45 Columnaris 45 flu viruses 45 campylobacteriosis 45 Salmonella typhi 45 vomitoxin 45 Contaminated 45 chloramine 45 airborne particulates 45 Botulism 45 inorganic arsenic 45 Listeria infection 45 Asian citrus psyllids 45 zebra mussel larvae 45 listeria infection 45 foodborne 45 bacillus bacteria 45 selenium 45 Legionella pneumophila 45 perfluorooctane sulfonate 45 parainfluenza virus 45 acrylamide 45 allergic reactions 45 Mycoplasma pneumoniae 45 resistant bacteria 45 non O# STEC 45 uncooked foods 45 Staphylococcus aureus MRSA 45 bacterial infections 45 PFGE pattern 45 benzene contamination 45 Nitrate contamination 45 Clostridium difficile bacteria 45 cyanobacterial toxins 45 PAH concentrations 45 prion proteins 45 veligers 45 Clostridium perfringens 45 PCBs 45 Lyngbya 45 bacteria campylobacter 45 mosquito borne disease 45 wastewater effluent 45 polybrominated diphenyl ether 45 Shigella infections 45 hot peppers jalapenos 45 enterobacteriaceae 45 PCBs dioxins 45 dioxin Zimpfer 45 rabid skunk 45 foodborne illness outbreaks 45 serratia marcescens 45 packaged spinach 45 invasive alga 45 protozoan parasite 45 salmonella illnesses 45 C. parvum 45 whirling disease 45 probiotic bacteria 45 Clostridium Botulinum 45 industrial chemical melamine 45 BSE prions 45 bird flu strain 45 PCB contamination 45 Noroviruses 45 Sewage overflows 45 Fecal contamination 45 Foodborne illness 45 PFGE 45 chemical malachite green 45 protozoans 45 trichlorethylene 45 H. pylori bacteria 45 anaerobic bacterium 45 WNV 45 sulfated chondroitin sulfate 45 powerful neurotoxin 45 mercury concentrations 45 didymo 45 powdered infant formula 45 bacterial pathogens 45 Radioactive isotopes 45 H5 avian flu 45 H5 virus 45 dioxin PCBs 45 MRSA staph infection 45 Pseudomonas fluorescens 45 contaminated spinach 45 acanthamoeba 45 adenoviruses 45 uncooked tomatoes 45 bacterium Salmonella enteritidis 45 west nile virus 45 Alfalfa sprouts 45 monkeypox virus 45 bacteria Bacillus 45 Bt toxin 44 melamine 44 nerve toxin 44 mosquito larvae 44 Baxter heparin 44 superbug 44 E.coli infection 44 cadmium 44 haloacetic acid 44 phosphorus concentrations 44 heptachlor 44 virulent pathogen 44 undercooked shellfish 44 full blown haemolytic 44 Trichloroethylene TCE 44 toxin domoic acid 44 infective agent 44 micro organisms 44 drug resistant superbug 44 insect larva 44 multistate salmonella outbreak 44 giardia 44 waterborne illness 44 undeclared allergen 44 residual chlorine 44 enterotoxin 44 brevetoxin 44 beachwater samples 44 anthrax bacterium 44 radioactive substance 44 Escherichia coli Klebsiella pneumoniae 44 undeclared milk 44 flu strains 44 triclosan 44 spore forming bacteria 44 Giardia 44 intersex fish 44 salmonella Saintpaul 44 cyanuric acid 44 colon bacillus 44 waterborne microorganisms 44 Unpasteurized milk 44 Largemouth Bass Virus 44 fresh spinach 44 malaria parasite 44 undercooked meat 44 intestinal parasite 44 MtBE 44 groundwater contaminants 44 salmonella tainted 44 whipworm 44 microbial organisms 44 microbiological testing 44 sewage spills 44 tularemia 44 Methylmercury 44 nonpathogenic 44 Norovirus outbreak 44 S. Typhimurium 44 foodborne illnesses 44 elevated PBDE 44 mad cow disease 44 vancomycin resistant 44 frozen beef patties 44 perfluorinated chemicals 44 Staph 44 cyanobacterial 44 undercooked poultry 44 dengue virus 44 acinetobacter 44 pathogenic strain 44 airborne toxins 44 perfluorooctanoic acid PFOA 44 dissolved oxygen levels 44 mineral selenium 44 naturally occurring radium 44 acrolein 44 Alfalfa Sprouts 44 microscopic larvae 44 antibiotic resistant strain 44 Yersinia enterocolitica 44 Naegleria fowleri nuh ee 44 Enterobacter cloacae 44 Escherichia coli E.coli 44 phosphorus pollution 44 alphavirus 44 nematode parasite 44 undercooked meats 44 Giardia lamblia 44 methamidophos 44 chlorinated 44 single celled bacteria 44 C. diff 44 Infected mosquitoes 44 oversulfated chondroitin sulfate 44 undeclared ingredient 44 Smith DeWaal 44 Infected hens rodents 44 tainted heparin 44 Escherichia coli bacterium 44 tularemia bacteria 44 borne diseases 44 pathogenic bacterium 44 pathogenic organisms 44 potato wart 44 bacillus cereus 44 E.coli infections 44 allergen 44 Staphylococcus aureus 44 mosquito borne viruses 44 Hemolytic Uremic Syndrome 44 microbial pathogens 44 alga 44 bacillus 44 staph germ 44 Vibrio bacteria 44 WNV infection 44 total dissolved solids 44 cholera bacterium 44 radioactive strontium 44 fecal coli 44 oversulfated chondroitin 44 micro organism 44 Cryptococcus gattii 44 botulism spores 44 purity potency 44 spinach 44 S. marcescens 44 organophosphate pesticide 44 oxidized lipids 44 cfu 44 bacteria Pseudomonas aeruginosa 44 H#N# subtype 44 irradiated foods 44 Taco Bell restaurants 44 hemolytic uremic syndrome HUS 44 Escherichia coli O# 44 Aflatoxin 44 carbon tetrachloride 44 H#N# influenza virus 44 E. coli Escherichia coli 44 unpasteurized apple cider 44 LLRICE 44 fungal organisms 43 chemical melamine 43 coli O# H7 43 swine Flu 43 misshapen proteins 43 borne botulism 43 rotaviruses 43 C. botulinum 43 citrus greening disease 43 Cryptococcus neoformans 43 counterfeit toothpaste 43 Aspergillus 43 odorless colorless gas 43 FMDV 43 anthrax 43 cepacia 43 discharging wastewater 43 Fecal coliforms 43 airborne pathogens 43 shiga toxin 43 PBDE chemicals 43 Flu viruses 43 Swine flu viruses 43 raw jalapeno peppers 43 toxic chemical melamine 43 Contamination 43 mumps 43 furanones 43 dichlorvos 43 equine piroplasmosis 43 Bacteroides 43 Quagga mussels 43 Campylobacter infections 43 underprocessed 43 drug resistant staph 43 mercury contamination 43 domoic acid toxin 43 Contaminated groundwater 43 Psyllids 43 saintpaul 43 MRSA strains 43 TB germ 43 PCV1 43 endocrine disrupter 43 chemical C8 43 yersinia pestis 43 trichinosis 43 Lactobacilli 43 Clostridium botulinum bacteria 43 Tainted peanut butter 43 infectious prion 43 toxoplasma 43 Melamine contamination 43 pneumococci 43 waterborne bacteria 43 Escherichia Coli 43 Yersinia pestis 43 typhoid fever 43 contracted listeriosis 43 spores germinate 43 roundworms 43 Histoplasma capsulatum 43 MRSA germs 43 fimbriae 43 tritium radioactive isotope 43 SARS coronavirus 43 multistate E. coli 43 H5 strain 43 asbestos fibers 43 Ciguatera 43 C. difficile bacterium 43 TTHM 43 MRSA infections 43 maximum contaminant 43 E. coli poisoning 43 NMP# protein 43 harmful algae blooms 43 fungus Aspergillus 43 cladophora 43 usnic acid 43 formaldehyde carcinogen 43 toxic chemicals 43 perchlorate contamination 43 subtilis 43 Y. pestis 43 Sprouters Northwest 43 bacteriophage 43 V. vulnificus 43 unpasteurized juice 43 shellfish harvested 43 Avian botulism 43 Vibrio cholerae bacterium 43 shiga toxin producing 43 ash borer larvae 43 Chlamydophila pneumoniae 43 blood thinner heparin 43 PCBs polychlorinated biphenyls 43 genotoxic substance 43 Campylobacter jejuni 43 Balamuthia mandrillaris 43 TCE contamination 43 germ 43 strep bacteria 43 Norovirus outbreaks 43 Serratia 43 invasive quagga mussel 43 roxarsone 43 S. typhimurium 43 insecticide malathion 43 highly pathogenic H#N# virus 43 nitrate nitrogen 43 aureus MRSA 43 gastroenteritis 43 pesticide 43 pathogenicity 43 acetochlor 43 shellfish poisoning 43 lycopene carotenoid 43 bacterium Neisseria meningitidis 43 Epizootic Hemorrhagic Disease 43 campylobacter salmonella 43 avian influenza viruses 43 bacteria Streptococcus pneumoniae 43 fungus spores 43 GABHS 43 perchlorethylene 43 contaminated deli meats 43 flavor enhancer hydrolyzed vegetable 43 Sewage spills 43 swine flu 43 H#N# 43 influenza A/H#N# virus 43 tritium 43 coli outbreak 43 bacteria Pseudomonas 43 Salmonella Typhi 43 H5 viruses 43 Kansas meatpacker Creekstone 43 formaldehyde preservative commonly 43 ingested inhaled 43 invasive meningococcal disease 43 coliform organisms 43 Salmonella Schwarzengrund 43 meningococcal infection 43 Staphylococcus 43 mudsnails 43 Carbon monoxide poisoning 43 FMD virus 43 tuberculosis bacterium 43 West Nile 43 airborne mold spores 43 dioxin contamination 43 scrapie infected 43 chlorinated hydrocarbon 43 Salmonella enterica serovar 43 commensal bacteria 43 highly pathogenic 43 cryptosporidium bug 43 hydrolyzed vegetable protein HVP 43 Discolored water 43 vancomycin resistant enterococcus 43 roasted pistachios 43 Clostridium botulinum toxin 43 algaes 43 RWIs 43 carbapenem resistant Klebsiella pneumoniae 43 Penicillium 43 baker yeast 43 fungal meningitis 43 Prion proteins 43 spore forming bacterium 43 C. gattii 43 zebra mussel infestation