Related by context. All words. (Click for frequent words.) 71 contamination 58 bacterial contamination 55 E coli contamination 55 foodborne outbreaks 55 E.coli contamination 54 contaminated 54 microbial contamination 54 e coli contamination 53 microbiological contamination 53 Salmonella outbreaks 53 contaminants 52 contaminant 52 E. Coli contamination 52 bacteria Listeria monocytogenes 52 Salmonella contamination 52 Contamination 51 E. coli outbreaks 51 groundwater contaminant 51 E.coli O# H7 51 waterborne microorganisms 51 salmonella outbreaks 51 borne diseases 51 bacteria listeria monocytogenes 51 foodborne illness outbreaks 50 foodborne pathogens 50 foodborne pathogen 50 coli bacteria 50 H7 contamination 50 E. Coli 50 pesticide poisonings 50 antibiotic residues 49 spore forming bacteria 49 borne illness 49 Salmonella Enteritidis SE 49 E coli bacteria 49 microbiological testing 49 borne pathogens 49 food borne illnesses 49 salmonella contamination 49 salmonella E. coli 49 outbreaks 49 Foodborne illness 49 E.Coli 49 listeria contamination 49 listeria monocytogenes bacteria 49 fecal contamination 49 pathogens 49 dioxin contamination 48 undercooked poultry 48 salmonellosis outbreaks 48 parasite Cryptosporidium 48 E. coli contamination 48 Salmonella enteritidis 48 borne illnesses 48 Listeria monocytogenes bacteria 48 Escherichia coli O# 48 microbiological contaminants 48 E. coli 48 faecal contamination 48 pesticide residues 48 contaminating 48 PFCAs 47 pesticide residue 47 foodborne 47 salmonella enteritidis 47 E coli 47 bacteria campylobacter 47 ingestions 47 E. Coli outbreak 47 microbiological 47 reinfestation 47 Salmonella Listeria 47 e Coli 47 disinfectant byproducts 47 fumonisin 47 exceedances 47 Listeria contamination 47 Salmonella Saintpaul strain 47 O# strains 47 CDC Tauxe 47 Polychlorinated biphenyls PCBs 47 CO poisonings 47 nitrate contamination 47 spillages 47 spillage 47 algal toxins 46 Ecoli 46 e coli 46 salmonella 46 harmful contaminants 46 Acanthamoeba 46 pathogenic micro organisms 46 antibiotic resistant organisms 46 spoilage bacteria 46 non O# STEC 46 antibiotic residue 46 dichloroethylene 46 bacteriological contamination 46 residues 46 bacterias 46 listeria salmonella 46 polybrominated diphenyl ether 46 E.coli 46 chlorine disinfectant 46 Campylobacter infections 46 Bacillus cereus 46 #,#,# tribromoanisole chemical 46 prepackaged spinach 46 waterborne illnesses 46 microbial spoilage 46 E Coli 46 Enterococci 46 Bromate 46 recontamination 46 germicides 46 organochlorine pesticides 46 RASFF 46 Contaminants 46 aflatoxins 46 Salmonella outbreak 46 genotoxic substance 46 foodborne diseases 46 bioaerosol 46 E. sakazakii 46 grease buildup 45 adulterations 45 antibiotic resistant microbes 45 perfluorinated compounds 45 Escherichia coli O# H7 45 triclocarban 45 heptachlor 45 groundwater contamination 45 Campylobacter bacteria 45 plutonium americium 45 microbial pathogens 45 Listeria Salmonella 45 Coliforms 45 arsenic contamination 45 #,#,# trichloroethane 45 melamine contamination 45 chemical residues 45 pathogen 45 food borne pathogens 45 enteric pathogens 45 pathogen E. coli 45 microbiological hazards 45 Vibrio infections 45 undercooked meats 45 PFOAs 45 coli 45 e.coli 45 pathogenic organism 45 disinfection byproducts 45 radioactive contamination 45 coliform contamination 45 harmful pathogens 45 E. Coli bacteria 45 radiological contamination 45 fungal toxins 45 e coli outbreak 45 benzene contamination 45 E coli O# 45 semicarbazide 45 endrin 45 contaminate 44 TCE trichlorethylene 44 estrogenic compounds 44 aquatic toxicity 44 E.coli bacteria 44 campylobacteriosis 44 fecal coliforms 44 aminopterin rat poison 44 Salmonella Typhimurium outbreak 44 perfluorinated compounds PFCs 44 E. coli Salmonella 44 accidental ingestion 44 synthetic musks 44 TCE PCE 44 waterborne pathogens 44 total coliform 44 nitrates phosphates 44 bacterial contaminations 44 Microbiological 44 PRRS virus 44 foodborne disease 44 perfluorinated chemicals 44 foodborne bacteria 44 disinfection 44 inorganic contaminants 44 resistant organisms 44 food borne pathogen 44 microbial contaminants 44 E.Coli bacteria 44 pathogenic microbes 44 microbiologically 44 RapidChek R 44 Perchlorate contamination 44 salmonella infection 44 foodborne illness 44 Pesticide residues 44 patulin 44 beryllium dust 44 DBPs 44 bacterial contaminants 44 Listeria Monocytogenes 44 sicknesses 44 tracebacks 44 chlorine byproducts 44 chlorinated compounds 44 e coli bacteria 44 Contaminated 44 contaminents 44 Salmonella saintpaul 44 estrogenic chemicals 44 filtrations 44 selenium concentrations 44 allergenic proteins 44 salmonella bacterium 44 accidental spillage 44 bacteria 44 arsenic contaminated 44 shigella bacteria 44 Campylobacter spp 43 E Coli bacteria 43 salmonella infections 43 allergenic foods 43 Radioactive substances 43 manure spills 43 weevil infestation 43 herbicide Atrazine 43 TCE contamination 43 chemically contaminated 43 Ben Embarek 43 anthrax ricin 43 ecoli 43 arsenic concentrations 43 carcinogenic substances 43 E. coli strain 43 oversulfated chondroitin sulfate OSCS 43 E.coli bacterium 43 flame retardants PBDEs 43 perchlorate contamination 43 remediations 43 bromate 43 toxaphene 43 bourne diseases 43 e.Coli 43 O# H7 43 organochlorines 43 Dole Earthbound Farm 43 cancer causer 43 Radioactive contamination 43 coliforms 43 Enterobacter sakazakii 43 dioxin scare 43 nauseating odors 43 Salmonella Enteritidis 43 pesticide contamination 43 infant botulism 43 airborne toxins 43 hot peppers jalapenos 43 dimethoate 43 hazardous solvents 43 coliform 43 Smith DeWaal 43 Escherichia coli E. coli 43 firefighting foams 43 bacterium Listeria monocytogenes 43 thorough handwashing 43 herbicide residues 43 Bacterial contamination 43 E.coli outbreaks 43 Salmonella Saintpaul outbreak 43 detections 43 corrosives 43 ruminant feed 43 Enterococcus 43 drinking unpasteurised milk 43 Salmonella 42 pathogenic microorganisms 42 Listeria infections 42 salmonella Listeria monocytogenes 42 infections 42 Salmonella spp 42 Aspergillus 42 Chlorine bleach 42 radiological contaminants 42 sewage spills 42 Disinfecting 42 norovirus outbreaks 42 frog deformities 42 poisoning 42 Salmonella bacteria 42 biowarfare agents 42 radioactive depleted uranium 42 dioxin PCBs 42 perfluorooctanoic acid PFOA 42 pathogenic organisms 42 Fecal coliform 42 chemical C8 42 Enterococcus bacteria 42 Salmonella Schwarzengrund 42 adulterants 42 campylobacter infection 42 foodborne illnesses 42 Chlordane 42 Aflatoxins 42 exposures 42 toxicants 42 cyanide spillage 42 amphibole asbestos 42 E. coli bacteria 42 Clostridium botulinum bacterium 42 toxic residues 42 dioxins 42 Bolthouse Farms Carrot Juice 42 chlorinated hydrocarbon 42 campylobacter 42 associated infections HAIs 42 pathogenic E. coli 42 melamine tableware 42 diarrheal illnesses 42 tetrachlorethylene PCE 42 naturally occurring arsenic 42 allergic reactions 42 bioaccumulation 42 Vesivirus 42 needlesticks 42 carcinogenic dioxins 42 tainted dumplings 42 Resistant bacteria 42 poisonings 42 C. diff infections 42 Melamine contamination 42 galvanic corrosion 42 peanut allergen 42 aliphatic hydrocarbons 42 tutin 42 Listeria monocytogenes contamination 42 Residues 42 Enteritidis 42 washwater 42 bacterial infections 42 O# strain 42 contaminant concentrations 42 latex allergens 42 C. perfringens 42 perfluorochemicals 42 arsenic selenium 42 Chromium VI 42 total coliforms 42 Salmonella poisoning 42 exceedance 42 dioxin TCDD 42 radioactively contaminated 42 chemical perfluorooctanoic acid PFOA 42 Salmonella E. coli 42 E. Coli O# H7 42 DDT pesticide banned 42 nitrate poisoning 42 cholera outbreaks 42 disinfect surfaces 42 enteric bacteria 42 shigella E. coli 42 dieldrin 42 heparin batches 42 FMD outbreaks 42 tetrachloroethene 42 spore forming bacterium 42 salmonella listeria 42 tritium contamination 42 Cryptosporidiosis 42 e.coli bacteria 42 potato wart 42 fluorotelomers 41 mycotoxin contamination 41 faecal coliforms 41 perfluorooctane sulfonate 41 pathogenic bacterium 41 radionuclide contamination 41 listeria 41 undeclared allergens 41 contaminated jalapeno pepper 41 dioxane 41 bioburden 41 Baxter heparin 41 bacteriological 41 Escherichia coli bacteria 41 grain entrapments 41 mislabelling 41 acetochlor 41 E.coli infections 41 Pesticide residue 41 Diacetyl 41 consuming unpasteurized milk 41 hydrogenated vegetable fat 41 Coliform 41 harmful germs 41 sulfated chondroitin sulfate 41 full blown haemolytic 41 sanitizer bucket 41 spoilage organisms 41 clostridium botulinum 41 Unpasteurized 41 airborne particulates 41 shampoos lotions 41 clostridium perfringens 41 trichloroethane 41 Serum phosphorus 41 Antibiotic resistant bacteria 41 borne pathogen 41 parasite cryptosporidium 41 Hadnot Point 41 Fecal bacteria 41 hazards 41 nitrate nitrogen 41 infant formula contaminated 41 wastewater discharges 41 nosocomial infections 41 multistate outbreak 41 carcinogenic chemical 41 deca BDE 41 waterborne parasite 41 toxic dioxins 41 E. coli O# [002] 41 faecal coliform 41 noroviruses 41 antibiotic resistant bugs 41 foodborne illness outbreak 41 harmful microorganisms 41 vancomycin resistant enterococci 41 antimicrobial resistant 41 resistant bacteria 41 PCBs pesticides 41 hydrogen sulfide gases 41 antibiotic resistant genes 41 phosphorus nutrient 41 Acrylamide 41 Campylobacter 41 perfluorochemicals PFCs 41 deadliest germs 41 Cryptosporidium parvum 41 endocrine disrupting chemicals 41 dioxin contaminated 41 coli outbreak 41 microcystins 41 Diethylene Glycol 41 PVC shower curtains 41 monocytogenes 41 occupational exposures 41 nosocomial infection 41 pesticide drift 41 spills 41 allergenic reactions 41 Carbon tetrachloride 41 Tainted spinach 41 insecticide sprays 41 arsenic cyanide 41 botulism contamination 41 contaminating groundwater 41 polychlorinated 41 microbiological sampling 41 fecal bacteria 41 dioxin tainted 41 PPCPs 41 PBDEs polybrominated diphenyl ethers 41 engineered nanoparticles 41 E. coli Listeria 41 organophosphate pesticide 41 Sherri McGarry 41 undercooked hamburger 41 PAH concentrations 41 salmonellosis outbreak 41 Odours 41 exceedences 41 toxic propellants 41 disease fireblight 41 pesticide poisoning 41 allergens 41 Sulfur compounds 41 waterborne parasites 41 fecal chloroform 41 bed bug infestations 41 allergenic ingredients 41 multidrug resistant bacteria 41 intestinal obstructions 41 Dichloro Diphenyl Trichloroethane DDT 40 toxicosis 40 chlorinated pesticides 40 inactivate viruses 40 microbial biofilms 40 salmonella typhimurium 40 trihalomethanes THMs 40 Flea collars 40 uncontrolled hazardous waste 40 undercooked eggs 40 adulterant 40 undercooked contaminated 40 Carbon monoxide CO 40 seagull droppings 40 Listeria 40 leachates 40 Escherichia Coli 40 Mycotoxins 40 Chlorinated 40 Cyclospora 40 Volatile Organic Compounds VOCs 40 hens Schaffner 40 PCB contamination 40 fecal coliform contamination 40 Coliform bacteria 40 DDVP 40 beachwater pollution 40 chlorinated solvent 40 MRSA Methicillin 40 disinfections 40 #,# dioxane 40 Flame retardants 40 bacterium Clostridium 40 dissolved oxygen DO 40 carcinogenic polycyclic aromatic hydrocarbons 40 latex allergies 40 hazardous substances 40 oversulfated chondroitin sulfate 40 groundwater contaminants 40 dioxin concentrations 40 E. coli STEC 40 ethyl mesylate 40 chemical malachite green 40 rat poisons 40 dichlorodiphenyltrichloroethane 40 combustible dusts 40 coli O# 40 mold fungi 40 pseudomonas 40 phosphates nitrates 40 Pesticide Residue 40 antibiotic resistant pathogens 40 organophosphate insecticide 40 pest repellents 40 fecal coliform bacteria 40 Salmonella serotypes 40 O# H7 strain 40 remote blackwater streams 40 Walkerton tragedy 40 Clostridium perfringens 40 E. coli O# H7 40 bacteria Streptococcus pneumoniae 40 biothreats 40 marine biotoxin 40 Leptospira 40 hydrogen cyanide HCN 40 Harmful algal blooms 40 Polychlorinated Biphenyls 40 mercury PCBs 40 Sulfates 40 microbiological organisms 40 particulate contamination 40 bacterial pathogens 40 E. coli O# [001] 40 acanthamoeba 40 Serratia marcescens 40 unpasteurized orange juice 40 Shigella bacteria 40 cyanobacteria blooms 40 staphylococcus bacteria 40 engineered nanomaterials 40 Allergic reactions 40 xenoestrogens 40 Inorganic arsenic 40 mycotoxin 40 Dieldrin 40 accidental poisonings 40 ADEs 40 Fecal coliforms 40 spreading germs 40 degreasing agent 40 undeclared milk 40 Inert ingredients 40 Nitrate contamination 40 biohazards 40 Pseudomonas bacteria 40 Listeria bacterium 40 campylobacter bacteria 40 chlorinated 40 H7 bacteria 40 pipeline ruptures 40 mycotoxins 40 E. coli bacterium 40 unapproved genetically modified 40 Ireland FSAI 40 opportunistic pathogens 40 listeria monocytogenes 40 BSE infectivity 40 quaternary ammonium compounds 40 Contaminant 40 anthrax botulism 40 vibriosis 40 waterborne illness 40 nuclides 40 cleaners disinfectants 40 enterococcus bacteria 40 bloodborne viruses 40 UTIs 40 insecticide endosulfan 40 selenium poisoning 40 monoxide 40 Poisonings 40 waterborne infectious diseases 40 resistant superbugs 40 PCB resuspension 40 unpasteurized juice 40 sewage discharges 40 heterotrophic bacteria 40 octa BDE 40 cadmium arsenic 40 carcinogen benzene 40 carcinogenic benzene 40 Listeria bacteria 40 PDBEs 40 furanones 40 fomites 40 unapproved genetically engineered 40 Propyl mercaptan 40 allergens irritants 40 potassium iodate 40 manure piles 40 disinfectants 40 furan 40 Frequent handwashing 40 Hexavalent chromium 40 vermin infestation 40 organochlorine pesticide 40 Polychlorinated biphenyls 40 bacteriological samples 40 E. coli strains 40 CRKP 40 carcinogenic chemicals 40 Anthrax Ricin 40 ozone disinfection 39 PCV1 39 endocrine disrupting chemical 39 virucidal 39 Staphylococci 39 haloacetic acid 39 Tractor rollovers 39 Melamine contaminated 39 PBDE flame retardants 39 bacteria Bacillus cereus 39 PBDE contamination 39 enterobacteriaceae 39 PCBs dioxins 39 allergenicity 39 radionuclide detection 39 occurrences 39 gastro intestinal infections 39 microbiologic 39 Salmonella bacterium 39 OraPhyte 39 dechlorinated 39 Brominated flame retardants 39 chlorinated hydrocarbons 39 fluorides 39 deicing fluids propylene glycol 39 LPAI H#N# 39 unlabeled containers 39 Fecal coliform bacteria 39 cork taint 39 Salmonella montevideo 39 siphonage 39 salmonella bacteria 39 Neisseria meningitides 39 antibiotic chloramphenicol 39 sulfuryl fluoride 39 mercury contamination 39 bacterial spores 39 organochlorine 39 effluent discharges 39 Salmonella enterica serovar 39 chlorine bleaching 39 antibiotic resistance 39 hydraulic fracturing fluids 39 toxins 39 E. coli listeria 39 biosecurity breaches 39 polybrominated diphenyl ether PBDE 39 polyaromatic hydrocarbons 39 infectious prion proteins 39 tainted toothpaste toys 39 pesticides flame retardants 39 HAIs 39 waterborne microbes 39 occupationally exposed 39 somatic cell counts 39 cryptosporidium 39 containing triclosan 39 tubing misconnections 39 roxarsone 39 PVC plastics 39 radioactivity 39 coliform bacteria 39 Points HACCP 39 butter flavorings 39 antibiotic resistant superbugs 39 salmonella strain 39 rodent feces 39 BPA leaching 39 CRBSI 39 Vibrio parahaemolyticus 39 dumpings 39 haloacetic acids 39 chromosome aberrations 39 unpermitted discharges 39 Methyl salicylate poisoning 39 trace amounts 39 prion infections 39 atrazine concentrations 39 bacterial 39 Perfluorinated chemicals 39 avoidable tragedies 39 high flavanol cocoa 39 toxic algae blooms 39 benzene toluene xylene 39 Salmonella Typhimurium 39 incidents 39 PCBs polychlorinated biphenyls 39 carbon monoxide poisonings 39 diacetyl exposure 39 bovine mastitis 39 pathogenic strain 39 PBDE 39 naturally occurring bacterium 39 radiological hazards 39 milk powder adulterated 39 mercury concentrations 39 zoonotic diseases 39 Ebola outbreaks 39 chlorine residual 39 unintentional overdoses 39 malachite green 39 enterococcus 39 PAHs polycyclic aromatic hydrocarbons 39 Enterobacteriaceae 39 algaecides 39 solvent vapors 39 infection 39 TCE plume 39 swine influenza viruses 39 chlorine residuals 39 e.coli outbreak 39 avian influenza outbreaks 39 seafood toothpaste 39 bacterium Bacillus anthracis 39 contaminants leach 39 BSE prions 39 Ebola Reston 39 unpasteurized juices 39 dioxin 39 Campylobacter infection 39 antibiotic resistant bacteria 39 Arsenic contamination 39 bacterium E. coli 39 toxic chemicals 39 outbreak 39 solvents pesticides 39 Taco Bell E. Coli 39 E.coli O# 39 itch mite 39 drinking unpasteurized milk 39 radioactive isotope iodine 39 Stachybotrys 39 urinary tract infections UTIs 39 microbiology laboratories 39 nonporous surfaces 39 bacterium Listeria 39 eat bagged spinach 39 uncooked eggs 39 toxicant 39 campylobacter salmonella 39 Hexavalent Chromium 39 hormone disrupter 39 vadose zone 39 pesticide carbofuran 39 Vitamin Cottage peanut butter 39 Shigella 39 PBDE chemicals 39 Salmonella enterica 39 contaminates 39 condensation dripping 39 Contaminating 39 diarrheal illness 39 Marlbrook Herefordshire 39 ozone particulate matter 39 Salmonella infection 39 stool specimen 39 fecal material 39 Staphylococcus 39 arsenic 39 infectious prions 39 allergy triggers 39 harmful byproducts 39 pinhole leaks 39 organophosphate exposure 39 vibrio parahaemolyticus bacteria 39 C diff infection 39 leachables 39 benzene arsenic 39 plausible explanation CAS 39 extractables 39 fecal coliform 39 aromatic amines 39 sea lice infestations 39 birth defects 39 #,# Dioxane 39 phosphine 39 meat slicers 39 pathogenic bird flu 39 borne botulism 39 Gravani 39 stain repellents 39 rinsing spinach 39 ingesting contaminated 39 contaminates drinking 39 vinyl shower curtains 39 cyclospora 39 suction entrapment 39 antibiotic overuse 39 Yersinia enterocolitica 39 trichloroethene 39 microearthquakes 39 hormone disrupters 39 microscopic parasites 39 derailments 39 insecticidal properties 39 endotoxins 39 LLRICE# 39 EHEC bacteria 39 bacillus cereus 39 OraPhyte TM 39 accidentally ingesting 39 fishkill 39 carcinogenic byproducts 39 peanut butter salmonella outbreak 39 potentially carcinogenic 39 atrazine herbicide 39 radioactive nuclides 39 bioagents 39 harmful substances 38 samples 38 Foodborne illnesses 38 Soil samples 38 hydrogen embrittlement 38 overusing antibiotics 38 biphenyls 38 methomyl 38 flux residues 38 cockroach infestation 38 Cholera outbreaks 38 dioxins PCBs 38 fumigations 38 disperse biofilms 38 nitrogen leaching 38 developmental neurotoxicity 38 Thoroughly cooking eggs 38 Vinyl chloride 38 perfluorooctane sulfonate PFOS 38 coagulase negative staphylococci 38 DDT PCBs 38 Tamiflu resistant strains 38 industrially farmed 38 stray voltage 38 Clostridium sordellii 38 epidemics 38 foodborne infections 38 bacteria Escherichia coli 38 trigger allergic reactions 38 carbon monoxide colorless odorless 38 eggshell thinning 38 reproductive toxins 38 Sewage spills 38 vapor plume 38 fungus Aspergillus 38 CDPH 38 genetic susceptibilities 38 Fecal Coliform 38 Listeriosis outbreak 38 staph bug 38 world uncommanded acceleration 38 chlordane 38 cyanide arsenic 38 toxic polychlorinated biphenyls 38 HCAIs 38 transmittable diseases 38 algal toxin 38 Klebsiella 38 Escherichia coli Klebsiella pneumoniae 38 sulfuric compounds 38 salmonella montevideo 38 Total Coliform 38 vaginal fluids 38 pollutes groundwater 38 Chlorination 38 Salmonella infections 38 Acinetobacter spp 38 THMs 38 crystalline silica 38 manure lagoons 38 hexane 38 zoonotic infections 38 FMD virus 38 avian influenza viruses 38 phyto sanitary SPS 38 allergenic 38 odor neutralizer 38 soils sediments 38 insect vectors 38 nitrofuran 38 diseases Histoplasmosis cryptococcosis 38 dichloroethene 38 mercury dioxins 38 wiping cloths 38 non conformances 38 salmonella illnesses 38 Cryptosporidium 38 pesticides aldrin 38 ammonia chlorine 38 anthrax Bacillus anthracis 38 hazardous chemicals 38 contaminate wheat gluten 38 oversulfated chondroitin 38 antibiotic resistant E. coli 38 unexploded cluster munitions 38 grass tetany 38 tributyltin TBT 38 fungal keratitis 38 phytoplankton zooplankton 38 cyst nematode 38 coal ash impoundments 38 dispersible 38 inhaling airborne particles 38 french fries potato chips 38 enteric infections 38 sulfated chondroitin 38 bioaerosols 38 occurences 38 airborne pollutant 38 combustion byproducts 38 arsenic mercury 38 sterilants 38 Baxter Heparin 38 phosphorus concentrations 38 cockroach infestations 38 degrease 38 respirable crystalline silica 38 indoor allergens 38 termite infestations 38 Clostridium Botulinum 38 pest infestation 38 toxic pollutant 38 gaseous byproducts 38 arboviruses 38 accidental discharges 38 pseudomonas aeruginosa 38 Similac infant formula 38 misclassifications 38 cryptosporidium parasite 38 multistate outbreaks 38 Zonyl 38 E coli outbreak 38 intestinal infections 38 enterobacter 38 poultry culls 38 outbreak EHEC 38 colliery accidents 38 VOC Volatile Organic Compounds 38 clostridium 38 tritium plume 38 Disinfectants 38 Infantino slings 38 bacterial pathogen 38 chlorine bleaches 38 organophosphate insecticides 38 Eamich 38 selenium toxicity 38 potent carcinogen 38 gastro intestinal illnesses 38 coli O# H7 38 nutrient inputs 38 mouthwashes containing 38 refrigerant leaks 38 penicillium 38 toxins leaching 38 faecal bacteria 38 causative agents 38 stool specimens 38 E.coli outbreak 38 traceback investigations 38 swine dysentery 38 harmful vapors