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(Click for frequent words.) 74 Flu viruses 69 influenza viruses 68 influenza virus 67 flu viruses 67 viral strains 64 Noroviruses 63 flu viruses mutate 63 flu strains 62 meningococcus 62 Staphylococcus bacteria 62 influenza virus mutates 62 influenza strains 62 flu virus mutates 62 influenza subtype 62 antigenic shift 62 seasonal influenza viruses 61 Swine flu viruses 61 Coronaviruses 61 influenza viruses circulating 61 virus subtype 61 viruses 61 Pneumococcus 61 flu virus 61 CHIKV 61 virus mutates 61 pathogenic strains 60 seasonal influenzas 60 bacteria Streptococcus pneumoniae 60 rotaviruses 60 pathogenic viruses 60 Adenoviruses 60 Viral infections 60 Malaria parasites 60 Drug resistant strains 60 influenzas 60 Salmonella typhi 59 Meningococcal meningitis 59 Staph bacteria 59 bacterium Staphylococcus aureus 59 antigenic drift 59 corona virus 59 pandemic H#N# virus 59 avian flu viruses 59 viruses mutate 59 strain mutates 59 H5 viruses 59 re assort 59 influenza viruses mutate 59 bacterium Neisseria meningitidis 59 Genital herpes 59 Bacterial infections 59 multiresistant 59 rotavirus strains 59 opportunistic pathogens 59 staphylococci 59 avian influenza viruses 59 Staphylococcus aureus bacteria 59 S.aureus 59 H#N# influenza viruses 59 H#N# influenza virus 58 avian strain 58 Respiratory syncytial virus RSV 58 paramyxoviruses 58 Yeast infections 58 Highly contagious 58 Viral gastroenteritis 58 bacterial strains 58 influenza 58 P. falciparum malaria 58 Neisseria meningitides 58 Fungal infections 58 O# strain 58 N. meningitidis 58 Salmonella bacteria 58 Viruses 58 dermatophytes 58 contagious viral infection 58 Influenza viruses mutate 58 Prion proteins 58 multidrug resistant strains 58 Avian influenza viruses 58 Latent TB 58 surface proteins hemagglutinin 58 parainfluenza virus 58 TB bacilli 57 Coxiella burnetii 57 Haemophilus 57 respiratory viruses 57 Plasmodium ovale 57 Swine influenza 57 Highly pathogenic 57 H#N# Influenza virus 57 pyogenes 57 Cryptococcus neoformans 57 noroviruses 57 Plasmodium parasite 57 Staphylococcus aureus MRSA 57 secondary bacterial infections 57 Mycoplasma pneumoniae 57 constantly mutating 57 swine influenza viruses 57 strep germ 57 Resistant strains 57 staphylococcus bacteria 57 Shigella bacteria 57 Staphylococci 57 influenza subtypes 57 alphavirus 57 immuno compromised 57 Streptococcus pneumonia 57 Staph aureus 57 rhinoviruses 57 Psittacosis 57 mycobacterium tuberculosis 57 mousepox 57 Bacteriophages 57 bacterium 57 Infected birds 57 Dengue virus 57 Respiratory infections 57 B. cepacia 57 Antibiotic resistant bacteria 57 necrotizing pneumonia 57 Pneumonic plague 57 Salmonella Typhi 57 endospores 57 seasonal influenza strains 57 RNA viruses 57 salmonella campylobacter 57 Cold sores 57 pathogens 57 dengue serotype 57 parasite Plasmodium falciparum 56 methicillin susceptible Staphylococcus aureus 56 Flu epidemics 56 Candida species 56 pneumococcal infection 56 dual tropic 56 asymptomatic carriers 56 Streptococcus pneumoniae bacteria 56 Smallpox vaccines 56 adamantanes 56 H#N# viruses 56 Genital warts 56 Bloodstream infections 56 methicillin resistant MRSA 56 avian strains 56 Genetic mutations 56 Pathogenic bacteria 56 S. aureus bacteria 56 highly pathogenic strains 56 cholera bacterium 56 H#N# subtype 56 Extensively drug 56 hemagglutinin HA 56 Escherichia coli bacteria 56 protozoan parasites 56 Mycobacterium bovis 56 clostridia 56 bacterias 56 Seasonal influenza 56 antibiotic resistant bacterium 56 Drug resistant tuberculosis 56 infects pigs 56 dust mite allergies 56 plasmodium 56 herpesviruses 56 H#N# virus mutates 56 acinetobacter 56 Highly pathogenic avian influenza 56 Babesia 56 avian swine 56 TB germs 56 Dengue hemorrhagic fever 56 avian H#N# 56 infects humans 56 influenza epidemics 56 HPVs 56 N. gonorrhoeae 56 mycobacterium 56 mutated strain 56 Multidrug resistant 56 L. pneumophila 56 Flu viruses mutate 55 bacteria Pseudomonas aeruginosa 55 infective agent 55 dengue hemorrhagic fever DHF 55 Meningococcal infection 55 receptor specificity 55 Rickettsia 55 swine flu virus 55 plasmodium falciparum 55 opportunistic pathogen 55 Typhoid fever 55 Campylobacter bacteria 55 Pandemics occur 55 BRSV 55 virulent strains 55 Salmonella Campylobacter 55 Allergic reactions 55 Canine influenza 55 microfilariae 55 superantigens 55 C. botulinum 55 flavivirus 55 E. coli STEC 55 H7 avian flu 55 Plasmodium parasites 55 bacterial pathogen 55 Inhaled anthrax 55 avian flu mutates 55 rhinotracheitis 55 falciparum 55 Shiga toxin 55 super spreaders 55 pneumococci 55 Yersinia pestis 55 VZV 55 bacilli 55 H#Y 55 Influenza 55 TB bacterium 55 Pasteurella 55 resistant organisms 55 C. jejuni 55 pandemic influenza strains 55 pandemic influenza viruses 55 Typhi 55 H#N# mutates 55 bacterial pneumonias 55 varicella zoster virus VZV 55 Staph infections 55 transmit dengue 55 Streptococcus pyogenes 55 circulating influenza viruses 55 spore forming bacterium 55 P. falciparum parasites 55 viral subtypes 55 Listeria infections 55 ESBL producing E. coli 55 multidrug resistant 55 trigger allergic reactions 55 Pandemics 55 S. aureus infection 55 Plasmodium falciparum parasite 55 Fusarium species 55 malaria parasite Plasmodium falciparum 55 Enterococcus faecium 55 pneumococcus 55 MenB strains 55 fungal organisms 55 Harmful algal blooms 55 commensals 55 human metapneumovirus 55 Foodborne illness 55 bacterium Mycobacterium tuberculosis 54 bacterium Bacillus anthracis 54 S. sanguinis 54 MRSA strains 54 fungal bacterial 54 Vector borne diseases 54 dengue viruses 54 Enterobacter cloacae 54 Meningococcal disease 54 serogroup B 54 hantaviruses 54 Tularemia 54 naturally occurring bacterium 54 parasite Trypanosoma cruzi 54 noninfectious 54 parainfluenza viruses 54 Dust mites 54 H7 subtypes 54 MRSA bacterium 54 Viral conjunctivitis 54 H#N#virus 54 H5 strains 54 spore forming bacteria 54 Plasmodium species 54 M. pneumoniae 54 easily transmittable 54 methicillin 54 causative organisms 54 S OIV 54 Escherichia coli Klebsiella pneumoniae 54 Borrelia 54 S. pneumoniae 54 Poliovirus 54 enteroviruses 54 virus 54 feline distemper 54 LAIV 54 Sporadic CJD 54 Infectious diseases 54 Adenovirus 54 Adenoviruses usually cause 54 Hendra viruses 54 commonly infect humans 54 Roundworms 54 bacterium Listeria 54 faecal oral route 54 antigenically 54 pneumococcal strains 54 hemagglutinin H 54 Pandemic flu 54 Epstein Barr virus EBV 54 Hemagglutinin 54 Neisseria meningitidis 54 Canker sores 54 Streptococcus pneumoniae 54 Respiratory syncytial virus 54 genus Plasmodium 54 meningitides 54 Pseudomonas bacteria 54 B. cereus 54 pathogenic E. coli 54 prion infections 54 Fluoroquinolones 54 Noro virus 54 Streptococcus pneumoniae Haemophilus influenzae 54 bird flu virus mutates 54 super infectors 54 H#Y mutation 54 enterohaemorrhagic E. coli EHEC 54 immunosuppressed patients 54 P. falciparum parasite 54 Lepto 54 waterborne microbes 54 Escherichia coli E.coli 54 Parasitic worms 54 haemorrhagic fevers 54 avian influenza H#N# 54 spore forming 54 avian H#N# influenza 54 papillomaviruses 54 Thorough cooking kills 54 seasonal flus 54 Raccoon rabies 54 varicella zoster virus 54 USA# strain 54 Tamiflu resistant strains 54 Invasive fungal infections 54 toxoid 54 Staphylococcus aureus bacterium 54 Burkholderia 54 tick borne 54 bacteria Bacillus anthracis 54 viral isolates 54 bacterial toxins 54 Bcr Abl mutations 54 Opportunistic infections 54 pneumococcal bacteria 54 Swine Influenza 54 tickborne 54 causes chickenpox 54 meningococcal bacteria 54 lymphogranuloma venereum LGV 54 superspreaders 54 neuraminidases 54 HPAI H#N# 54 bacteria Neisseria meningitidis 54 shigella bacteria 54 commensal bacteria 54 innate immune responses 54 C. difficile bacteria 54 Staphylococcus epidermidis 54 Anaplasma 54 M. anisopliae 54 Vibrio parahaemolyticus 54 Head lice 54 Campylobacter jejuni 53 Saintpaul 53 avian influenza virus 53 pandemic H#N# influenza 53 Burkholderia pseudomallei 53 H5 N1 53 S Typhi 53 serovar 53 oseltamivir resistant 53 ESBLs 53 falciparum strain 53 Avian influenza H#N# 53 H7 viruses 53 M. bovis 53 measles whooping cough 53 Avian cholera 53 pathogenic bacterium 53 pandemic strain 53 Rhinoviruses 53 swine origin 53 lethal H#N# avian 53 vesicular stomatitis virus 53 virulence genes 53 bacterium Streptococcus pneumoniae 53 Enterococcus faecalis vancomycin susceptible 53 diarrhea abdominal cramps nausea 53 pneumococcal serotypes 53 Antibiotic resistance 53 chloroquine resistant 53 readily transmissible 53 A. fumigatus 53 HIN1 virus 53 typhimurium 53 S. Typhimurium 53 mumps rubella 53 campylobacter salmonella 53 Shigella 53 avian H#N# virus 53 Slime molds 53 vancomycin resistant 53 Pneumococcal infections 53 hemorrhagic fever viruses 53 tuberculosis bacterium 53 Mycobacterium tuberculosis 53 Typhimurium 53 Legionella pneumophila 53 neuraminidase N 53 influenzae 53 flus 53 Salmonella enterica 53 foodborne pathogen 53 serogroups 53 parasite Toxoplasma gondii 53 H#N# Avian Flu 53 insect vector 53 Francisella 53 pathogenic microorganisms 53 single celled parasite 53 lymphogranuloma venereum 53 mutated virus 53 Chlamydia trachomatis 53 antibiotic methicillin 53 Salmonellosis 53 viral pathogens 53 S. aureus bacterial infections 53 pneumocystis 53 Plasmodium vivax 53 causative agents 53 fluoroquinolone resistance 53 Culicoides 53 T. pallidum 53 Th2 cells 53 viral haemorrhagic fevers 53 vivax malaria 53 Bordetella 53 Insect repellents 53 wart virus 53 Entamoeba 53 inactivated viruses 53 Staphyloccus aureus 53 drug resistant strains 53 Heartworm disease 53 contagions 53 Clostridium difficile bacteria 53 Herpes simplex virus 53 methicillin resistant S. aureus 53 polioviruses 53 helminths 53 Antiviral drugs 53 Batrachochytrium dendrobatidis 53 attenuated weakened 53 malaria dengue fever 53 bird flu mutates 53 Ebola Marburg 53 coagulase negative staphylococci 53 Bacterial pneumonia 53 pneumonias 53 nonfatal diarrhea 53 B. abortus 53 infectious organisms 53 S. suis 53 molds fungi 53 herpes viruses 53 Autoimmune diseases 53 TB germ 53 Neisseria 53 monocytogenes 53 Multidrug resistant TB 53 chikungunya fever 53 virus mutating 53 viruses infect 53 Methicillin resistant 53 biting midges 53 mycoplasma pneumoniae 53 Gliomas 53 swine flu mutates 53 resistant staphylococcus aureus 53 E. coli Salmonella 53 abnormal amyloid 53 dengue haemorrhagic fever DHF 53 Genital HPV 53 hemorrhagic fevers 52 seasonal influenza 52 organism 52 Melanomas 52 ZEBOV 52 fungal pathogen 52 Mosquito borne 52 multidrug resistant MDR 52 Clostridium difficile C. difficile 52 pathogenic strain 52 plasmodium parasite 52 cloven footed animals 52 H#N# isolates 52 bacteria Mycobacterium tuberculosis 52 Clade B 52 Foodborne illnesses 52 Norovirus infection 52 TB bacillus 52 Moraxella bovis 52 cowpox virus 52 Toxoplasmosis 52 carbapenem resistant 52 H#N# virus 52 Klebsiella pneumoniae 52 Chikungunya fever 52 kanamycin 52 coronaviruses 52 Influenza H#N# 52 fusogen 52 pathogen 52 unicellular organisms 52 immunity wanes 52 seasonal influenza virus 52 Enterobacteriaceae 52 meningococcus bacteria 52 Smallpox vaccine 52 strep bacteria 52 Mosquito borne diseases 52 Strep bacteria 52 H7 strains 52 vaccinia 52 CD8 responses 52 pandemic H#N# 52 macrolide resistant 52 live attenuated vaccines 52 human rhinovirus HRV 52 pneumoniae 52 viral proteins 52 Y. pestis 52 Dengue fever 52 Peanut allergies 52 Trichomonas vaginalis 52 influenza antiviral medications 52 Virulence 52 A/Brisbane/#/# H#N# 52 aedes aegypti mosquito 52 enterotoxigenic E. coli 52 malaria parasite 52 Prion diseases 52 Flu pandemics 52 Mycoplasma 52 arboviruses 52 S. aureus strains 52 protozoal 52 P aeruginosa 52 respiratory syndrome virus 52 dengue virus 52 waterborne bacteria 52 bacterial spores 52 Wolbachia 52 pathogen virulence 52 protozoans 52 faecium 52 Chikungunya virus 52 listeria salmonella 52 endogenous retroviruses 52 variola 52 E.coli O# 52 serotype 52 bacteria protozoa 52 latently infected 52 neuraminidase inhibitors 52 WNV infections 52 oxacillin 52 mycobacteria 52 multidrug resistant MDR TB 52 Meningococcal bacteria 52 methicillin resistant 52 Antibiotic resistant 52 Prions 52 bacterial wilt disease 52 Salmonella spp 52 Inhalation anthrax 52 bacillary dysentery 52 abnormal prions 52 Thoroughly cooking eggs 52 C. gattii 52 T. gondii 52 glanders 52 tetanus toxin 52 waterborne infectious diseases 52 dengue hemorrhagic fever 52 Human Papillomavirus 52 insect vectors 52 Herpes virus 52 tubercle bacillus 52 Coronavirus 52 Enterococci 52 subtilis 52 Peanut allergy 52 wingless insects 52 Anti virals 52 Human papillomavirus HPV 52 HSV1 52 P. aeruginosa 52 Viral meningitis 52 pandemic influenza A/H#N# 52 superbug NDM 1 52 Intestinal parasites 52 B. burgdorferi 52 pneumococcus bacteria 52 ESBL producing 52 pandemic influenza virus 52 Staphylococcus aureus infections 52 S. aureus 52 Acute Bacterial Sinusitis ABS 52 viral bacterial 52 Staphylococcus Aureus 52 Trichophyton rubrum 52 resistant strains 52 peptide antigens 52 Pathogens 52 picornavirus 52 Campylobacter infections 52 mutating virus 52 S. enterica 52 H#N# strain 52 Waterborne diseases 52 micro organism 52 Moraxella catarrhalis 52 Chlamydophila pneumoniae 52 Cutaneous anthrax 52 particles VLPs 52 bacterium Borrelia burgdorferi 52 haemagglutinin 52 leptospira 52 Chlamydia psittaci 52 resistant TB 52 vibrios 52 outer membrane proteins 52 Vancomycin resistant 52 methicillin susceptible 52 Coxiella 52 Mosquito bites 52 Meningococcemia 52 LCMV infection 52 Anaplasmosis 52 streptococcal 52 Pandemic H#N# 52 H#N# influenza 52 Swine influenza viruses 52 GABHS 52 H5 avian 52 infect humans 52 Candida albicans 52 Shigella dysentery 52 epiglottitis 52 avian virus 52 haemolytic anemia 52 Enteroviruses 52 Avian Flu H#N# 52 Plasmodium falciparum malaria 52 Cloned animals 52 Toxoplasma 52 Streptococcus pneumoniae pneumococcus 52 quinolone resistant 52 bacteria 52 PCV7 vaccine 52 multivalent vaccine 52 parasite plasmodium 52 mosquitoes Aedes aegypti 52 salmonella bacterium 52 Canine distemper 52 Candida infection 52 HMPV 52 Mosquitoes transmit 52 H1 H3 51 Mosquito borne illnesses 51 nontuberculous mycobacteria 51 rickettsial 51 Coxsackievirus 51 immunocompromised individuals 51 viral respiratory infections 51 Staph Aureus 51 Plasmodium 51 V. vulnificus 51 H. influenzae 51 adenoviruses 51 V. parahaemolyticus 51 Like Illness ILI 51 cow rumen Naczi 51 RSV infections 51 rhinovirus infection 51 Trypanosoma brucei 51 Avian Bird Flu 51 MDR tuberculosis 51 candidemia 51 Atopic dermatitis 51 perfringens 51 M. globosa 51 transmissable 51 nonpharmaceutical interventions 51 botulinum neurotoxin 51 avian flu virus 51 spoilage bacteria 51 obligate intracellular 51 Rotavirus 51 resistant S. aureus 51 aminoglycosides 51 strep infections 51 Pandemic influenza 51 pathogenic fungi 51 Skehel 51 allergenic proteins 51 fungus Cryptococcus neoformans 51 microbials 51 contagious bacterial infection 51 spectrum beta lactamases 51 arenaviruses 51 Chickenpox 51 bordatella 51 NNRTI resistant virus 51 clade B 51 Herbal medicines 51 foodborne bacteria 51 aureus MRSA 51 bacterium Salmonella typhi 51 Yersinia bacteria 51 Canine parvovirus 51 Trypanosoma 51 E.coli Salmonella 51 HIV mutates 51 infectious prions 51 Foodborne botulism 51 antiviral prophylaxis 51 prion strains 51 cynomolgus macaques 51 reassorted 51 herpes simplex viruses 51 Escherichia coli O# 51 Acanthamoeba 51 Variant CJD 51 RNA ribonucleic acid 51 contagious bacterial 51 Fujian strain 51 Malassezia 51 Streptococcus bacteria 51 anthracis 51 Human papilloma virus 51 subtyped 51 protease enzyme 51 Cluster headaches 51 Ebola fever 51 anopheles 51 oral poliovirus 51 Whooping cough pertussis 51 Falciparum 51 Subdural hematomas 51 mycoplasmas 51 #S rRNA genes 51 C. difficile toxins 51 B streptococci 51 Enteritidis 51 infectious droplets 51 T. brucei 51 H#N# avian flu 51 Dr. Tim Uyeki 51 capsular polysaccharide 51 Streptococcus pneumoniae S. pneumoniae 51 multidrug resistant organisms 51 ebola virus 51 parasite Leishmania 51 Falciparum malaria 51 coli 51 cryptococcosis 51 Necrotizing fasciitis 51 Aspergillus species 51 A/H#N# 51 Simian Immunodeficiency Virus 51 bacterium Francisella tularensis 51 B. subtilis 51 Intestinal worms 51 paralytic illness 51 microorganism 51 Ehrlichia 51 H7 subtype 51 Canine Influenza 51 H7 virus 51 latent infection 51 MDRSP 51 H#N# influenza strain 51 Brain aneurysms 51 ALI ARDS 51 Bluetongue virus 51 causative pathogens 51 streptococcal bacteria 51 avian influenzas 51 Systemic lupus erythematosus 51 attenuated strain 51 pathogenic organisms 51 gametocytes 51 toxoids 51 Without functional ribosomes 51 quasispecies 51 Bordetella pertussis 51 antigenic 51 adeno associated viruses 51 operons 51 highly pathogenic avian 51 immitis 51 neuraminidase NA 51 Bugbear.B 51 coccidia 51 Cryptosporidiosis 51 biotype 51 H#N# strain mutates 51 B. fragilis 51 neutralizing antibody responses 51 drug resistant XDR 51 methicillin susceptible MSSA 51 staph germs 51 bird virus mutates 51 trypanosome 51 candida infections 51 furanones 51 TRIM5a 51 Avian influenza 51 etiological agent 51 M2 inhibitors 51 strain secretes 51 parasite transmitted 51 artemisinins 51 zoonotic disease 51 Prevotella 51 reassortant 51 Mycobacterium 51 trypanosomes 51 immunosuppressed 51 nematode parasite 51 recombinants 51 staph bacterium 51 bonebreak fever 51 reassortments 51 M. leprae 51 Vaccine preventable diseases 51 thermophilum 51 mosquito vectors 51 microscopic parasites 51 malayi 51 penicillins 51 streptococcus suis bacteria 51 Novel H#N# influenza 51 mutations 51 Urinary tract infections UTIs 51 Ebola hemorrhagic fever 51 bacterium Escherichia coli 51 Immune responses 51 pseudomonas aeruginosa 51 S. aureus MRSA 51 mutans 51 saliva nasal secretions 51 genetically mutate 51 vaccinia virus 51 Avian Flu Virus 51 Variola 51 bacterium Vibrio cholerae 51 Cryptococcus gattii 51 Chronic fatigue syndrome 51 misshapen proteins 51 tetanus measles 51 anaerobes 51 Human papillomaviruses 51 Malignant melanoma 51 Phages 51 strongyles 51 B Anflu R 51 falciparum malaria 51 Acute bronchitis 51 Epstein Barr Virus EBV 51 bacteria campylobacter 51 A/H#N# flu virus 51 bacterial sepsis 51 malaria parasites 51 parasitic flatworms 51 papilloma virus 51 notifiable diseases 51 vancomycin resistant Staphylococcus aureus 51 poxviruses 51 streptococcus pneumoniae 51 gastrointestinal gut flora 51 bioterrorist weapon 51 Staphylococcus aureus 51 infectious prion proteins 51 TP# gene 51 VLPs 51 serotypes 51 T#I mutant 51 influenza A/H#N# virus 51 enterohaemorrhagic E. coli 51 bacterium E. coli 51 Enterococcus faecalis 51 Human papillomavirus 51 Fungus gnats 51 Staph germs 51 Umbilical cord stem cells 50 Propionibacterium acnes 50 anthrax plague 50 C. perfringens 50 spirochete 50 foodborne diseases 50 Klebsiella 50 Varicella zoster virus 50 nonvaccine 50 Influenza Type 50 enterobacter 50 Aspergillosis 50 infectious pathogens 50 Probiotic bacteria 50 Streptococcal 50 spore forming bacterium Bacillus 50 conserved antigens NP 50 microscopic organism 50 eating undercooked meat 50 staphylococcus aureus bacteria 50 reinfect 50 adenovirus infection 50 full blown haemolytic 50 Naegleria 50 retroviruses 50 Haemophilus influenzae 50 Acute diarrhea 50 Bronchiolitis 50 arthropod borne 50 nasal fluids 50 herpes zoster shingles 50 rhinovirus infections 50 vivax 50 reassort 50 intracellular bacteria 50 MRSA isolates 50 meningitis epidemics 50 virulent pathogen 50 methicillin resistant Staph aureus 50 Tay Sachs thalassemia 50 Hepatitis E 50 Flu vaccines 50 respiratory viral infections 50 Cyclospora 50 NS1 protein 50 fever blisters 50 Candida yeast 50 becomes easily transmissible 50 immunocompetent 50 antigens 50 Amantadine 50 vibriosis 50 transmissible spongiform encephalopathy 50 smallpox polio 50 rhinovirus 50 parainfluenza 50 salmonellae 50 bacterial toxin 50 Rotavirus infection 50 Methicillin 50 helminth infections 50 MenB 50 bluetongue virus 50 Hookworms 50 Anopheles gambiae mosquitoes 50 pathogenic fungus 50 streptococci 50 mutate influenza 50 infectious gastroenteritis 50 TACI mutations 50 inanimate surfaces 50 Outbreaks 50 nonbacterial 50 brucei 50 subtype 50 Pseudomonas syringae 50 swine dysentery 50 PrPSc 50 varicella virus 50 acute respiratory tract infections 50 dengue leptospirosis 50 Tumor cells 50 Wolbachia bacterium 50 aeruginosa 50 interspecies transmission 50 deadly diarrheal disease 50 X4 viruses 50 S. aureus infections 50 etiologic agent 50 highly pathogenic viruses 50 plague bacterium Yersinia 50 filoviruses 50 whipworm 50 H#N#