Related by context. All words. (Click for frequent words.) 62 PRRS virus 61 brucella 59 BTV8 59 bluetongue virus 59 glanders 59 Bluetongue virus 59 BSE prions 58 highly pathogenic virus 58 coccidiosis 58 PMWS 58 non O# STEC 58 avian influenza H#N# 58 Avian Influenza H#N# 58 BRSV 57 pathogen 57 pathogens 57 H7 virus 57 Mycobacterium bovis 57 H5 avian flu 57 infective agent 57 H5NI 57 highly pathogenic avian flu 57 equine piroplasmosis 57 bacterium Listeria 56 H5 strains 56 simian foamy virus 56 Pasteurella 56 HPAI H#N# 56 H5 viruses 56 Brucella abortus 56 Salmonella spp 56 influenza A/H#N# virus 56 avian influenza virus 56 pathogenic avian influenza 56 N#H# virus 56 paratuberculosis 56 BSE infectivity 56 oocysts 56 Bovine Spongiform Encephalopathy BSE 56 insect vectors 56 E. coli STEC 55 Neisseria meningitides 55 H#N#virus 55 Ebola Reston 55 avian flu viruses 55 Escherichia coli O# 55 Lepto 55 bluetongue disease 55 Enterobacter sakazakii 55 Venezuelan equine encephalitis 55 BTV1 55 sylvatic plague 55 Staphylococcus aureus bacterium 55 vesicular stomatitis virus 55 spore forming bacterium 55 coccidia 55 piroplasmosis 55 brucellosis tuberculosis 55 highly pathogenic H#N# 55 bacterial pathogen 55 Pasteurella multocida 55 polioviruses 55 V. parahaemolyticus 55 PCV2 55 Escherichia coli E.coli 55 Enterobacter cloacae 55 FMDV 55 highly pathogenic H#N# virus 55 equine influenza virus 54 Tamiflu resistant strains 54 Bovine Spongiform Encephalopathy 54 H5NI strain 54 Toxoplasma gondii 54 bovine respiratory 54 Campylobacter bacteria 54 Viral Hemorrhagic Septicemia 54 deadly Hendra virus 54 potato wart 54 IBR BVD 54 S. enterica 54 epizootic 54 B. burgdorferi 54 Yersinia pestis 54 Sars coronavirus 54 calicivirus 54 bacteria Bacillus anthracis 54 Shigella bacteria 54 perfringens 54 PCVAD 54 H7 bird flu 54 plague bacterium 54 bacterium Bacillus anthracis 54 H1N 54 CHIKV 54 Leptospira 54 streptococcus suis bacteria 54 Cryptosporidium parvum 54 domesticated fowl 54 hendra virus 54 bacteria Pseudomonas 54 Dengue virus 54 highly pathogenic avian influenza 54 H#N# Influenza virus 54 Salmonella Enteritidis SE 54 Avian influenza H#N# 54 pathogenic microbes 54 Vesivirus 54 PCV1 54 subtilis 53 salmonella bacterium 53 Mycobacterium leprae 53 enteric bacteria 53 dengue viruses 53 HN# [002] 53 foodborne pathogen 53 Coxiella burnetii 53 anthrax bacterium 53 vesicular stomatitis 53 spore forming bacteria 53 Highly pathogenic avian influenza 53 HPAI 53 streptococcus suis 53 mosquito vectors 53 enterobacteriaceae 53 T. cruzi 53 smallpox anthrax 53 Candida species 53 Legionella bacterium 53 PRRSV 53 Trichinella 53 migratory wildfowl 53 culex mosquito 53 Salmonella enterica 53 influenza subtype 53 Y. pestis 53 E.coli bacteria 53 micro organism 53 Escherichia coli bacteria 53 H7 subtype 53 nematode parasite 53 respiratory syndrome virus 53 reassortant 53 E. Coli bacteria 53 virus subtype 53 CCHF virus 53 highly pathogenic H#N# avian 53 avian influenza AI 53 birdflu 53 distemper virus 53 Ecoli 53 myrtle rust 53 midge borne 53 A/H#N# infection 53 TB bacillus 53 Equine piroplasmosis 53 H5NI bird flu 53 pandemic influenza virus 53 highly pathogenic Avian Influenza 53 avian H#N# virus 53 infectious prions 52 vibrio bacteria 52 H5 influenza 52 microscopic parasites 52 Anaplasma 52 L. monocytogenes 52 E.Coli bacteria 52 Streptococcus equi 52 antibiotic residues 52 Aedes Aegypti mosquitoes 52 coli O# H7 52 birdflu virus 52 H5NI virus 52 clostridium perfringens 52 contagious bacterial infection 52 pig herds 52 bacterias 52 Avian Flu Virus 52 H7 strains 52 Salmonella bacterium 52 infected fowl 52 Streptococcus bacteria 52 disease FMD 52 protozoan parasite 52 nitrofuran 52 parasite Trypanosoma cruzi 52 swine brucellosis 52 itch mite 52 zoonotic disease 52 Ebola Reston virus 52 circovirus 52 Aedes aegypti mosquitoes 52 Francisella 52 Infected birds 52 E coli O# 52 adenovirus infection 52 plague bacterium Yersinia 52 Klebsiella bacteria 52 pathogenic microorganisms 52 mycoplasma 52 oocyst 52 A/H#N# strain 52 cholera bacterium 52 corona virus 52 Influenza A/H#N# virus 52 worm larvae 52 bacterium Mycobacterium tuberculosis 52 tapeworm eggs 52 avian influenza 52 virulent H#N# 52 rhinotracheitis 52 reassorted 52 highly pathogenic bird flu 52 quarantinable disease 52 H5 avian influenza 52 pathogenic fungi 52 infected midges 52 aedes aegypti mosquitoes 52 bacterium Staphylococcus aureus 52 PRRS 52 attenuated vaccines 52 allergenic proteins 52 Vibrio parahaemolyticus 52 mussel larvae 52 atypical scrapie 52 Avian Influenza Virus 52 Campylobacter 52 oubreak 52 Highly Pathogenic Avian Influenza 52 clostridial 52 virginiamycin 52 arboviruses 52 serogroup B 52 Pirbright laboratory 52 Avian Influenza Bird Flu 52 Aedes Aegypti 52 Streptococcus pneumoniae bacteria 52 S. Typhimurium 52 clostridium 52 Chikungunya virus 52 Aedes Aegypti mosquito 52 Salmonella saintpaul 51 C. jejuni 51 microbiological contamination 51 pasteurella 51 enterotoxin 51 avian influenza viruses 51 variola virus 51 inactivate viruses 51 Babesia 51 coagulase negative staphylococci 51 Hendra virus 51 swine dysentery 51 Salmonella typhi 51 zoonotic pathogens 51 infectious bovine rhinotracheitis 51 coli bacteria 51 Trypanosoma 51 opportunistic pathogens 51 low pathogenic H5 51 Japanese encephalitis JE 51 H7 avian influenza 51 typhimurium 51 acinetobacter 51 FMD outbreak 51 mousepox 51 H5 N1 51 wild poliovirus 51 Bovine spongiform encephalopathy BSE 51 living modified organisms 51 porcine circovirus 51 harmful microorganisms 51 variola 51 Antibiotic resistant bacteria 51 disease fireblight 51 pathogenic strain 51 R. equi 51 alphavirus 51 AH#N# virus 51 cryptosporidium bug 51 P falciparum 51 E.coli O# 51 notifiable diseases 51 antibiotic resistant superbugs 51 pathogenic viruses 51 Listeria monocytogenes bacterium 51 bacterium Listeria monocytogenes 51 Equine herpes 51 C. botulinum 51 Burkholderia pseudomallei 51 faecal samples 51 bioterrorist weapon 51 Cryptosporidium parasite 51 Pseudomonas bacteria 51 virulent H#N# virus 51 bacterium Vibrio cholerae 51 effector proteins 51 virulent pathogen 51 H#N# highly pathogenic 51 clubroot 51 babesia 51 deadly H#N# virus 51 biocontainment 51 C. sordellii 51 biosecurity protocols 51 Wolbachia bacteria 51 bacterium Pseudomonas aeruginosa 51 low pathogenic H#N# 51 porcine circovirus type 51 infected cow 51 waterborne bacteria 51 vibrios 51 H5 virus 51 transmissible diseases 51 biowarfare agents 51 virus 51 Porcine Circovirus 51 avian strains 51 Mosquito larvae 51 S. neurona 51 vibrio cholerae 51 genetically engineered organisms 51 aedes aegypti 51 F. tularensis 51 avian flue 51 bacterial toxin 51 biosecure 51 coli 51 T. pallidum 51 banana bunchy top 51 RVF virus 51 anthelmintic 51 lethal toxin 51 Salmonella enterica serovar 51 infective larvae 51 bloodborne 51 M. bovis 51 antiserum 51 cutaneous anthrax 51 infectious organisms 51 linezolid resistant 51 tuberculosis bacillus 51 vancomycin resistant 51 virucidal 51 FMD 51 bacterium Clostridium 51 Herpes virus 51 antitoxins 51 Escherichia coli E. coli 51 bacterium 51 C. perfringens 51 enterobacter 51 schistosomes 51 helminths 51 H#N# HPAI 51 bacterium Clostridium difficile 51 Burkholderia 50 acaricide 50 spore forming 50 scrapie prions 50 microorganism 50 experimentally infected 50 paramyxoviruses 50 MRSA Methicillin 50 serovar 50 pseudorabies virus 50 low pathogenic strain 50 LPAI H#N# 50 Streptococcus suis bacteria 50 Moraxella bovis 50 Hendra virus infection 50 post weaning multisystemic 50 SARS coronavirus 50 Porcine circovirus 50 dengue mosquito 50 BSL3 50 brucellosis infections 50 disease vCJD 50 EHV 1 50 bacteria Streptococcus pneumoniae 50 Bacillus thuringiensis var 50 low pathogenic avian 50 enterobacteria 50 avian H#N# 50 bird flu virus mutates 50 Vibrio cholerae 50 vancomycin resistant enterococcus 50 Hepatitis E 50 inactivated viruses 50 H#N# Avian Flu 50 causative organism 50 Rimantadine 50 inhalational anthrax 50 meningococcal bacteria 50 mesias 50 Wolbachia bacterium 50 Methicillin resistant 50 E.coli bug 50 bacteria Mycobacterium tuberculosis 50 microbials 50 M. ulcerans 50 Onchocerca volvulus 50 harmful pathogens 50 obligate intracellular 50 west nile 50 undulant fever 50 Parvo Virus 50 influenza subtypes 50 clostridial diseases 50 E.coli O# H7 50 pathogenic E. coli 50 anthrax bacteria 50 low pathogenic strains 50 bird flue 50 transmissible spongiform encephalopathy TSE 50 P aeruginosa 50 Bioniche E. coli 50 aspergillus 50 Leptospirosis 50 sheep scab 50 bacillus 50 parasite Plasmodium falciparum 50 Tick bites 50 Shiga toxin 50 Salmonella Listeria 50 Swine fever 50 Swine influenza 50 abnormal prions 50 pathogenic organism 50 endospores 50 insect vector 50 Novel H#N# influenza 50 chlorine disinfection 50 reassortant virus 50 Pentagon mailrooms 50 Calicivirus 50 bacteria 50 lungworm 50 E Coli bacteria 50 protozoal 50 Agency VLA 50 pandemic H#N# virus 50 whipworm 50 NDV 50 Nipah virus 50 bacteria listeria monocytogenes 50 Avian Influenza AI 50 Coronavirus 50 waterborne microbes 50 lepto 50 single celled parasite 50 anthracis 50 trematodes 50 Smallpox vaccine 50 Strep bacteria 50 Rift Valley Fever RVF 50 live attenuated vaccines 50 anthrax botulism 50 Highly contagious 50 abnormal prion proteins 50 avian flu virus 50 avian influenzas 50 Trichinella spiralis 50 Hookworms 50 trichinosis 50 vancomycin resistant enterococci 50 methicillin resistant MRSA 50 M2 protein 50 KHV 50 prion infections 50 vector mosquitoes 50 Marburg fever 50 viruses 50 clover root weevil 50 O# strain 50 bovine spongiform 50 H#N# avian influenza viruses 50 diarrhea BVD 50 ochratoxin 50 microscopic parasite 50 microfilariae 50 Chlamydia trachomatis 50 swine influenza A/H#N# 50 spirochete 50 bacteria Bacillus 50 Legionella pneumophila 50 Swine flu viruses 49 fowl cholera 49 infective dose 49 viral pathogens 49 bacterium Neisseria meningitidis 49 e.coli bacteria 49 rickettsial 49 pox viruses 49 naturally occurring bacterium 49 infectious prion proteins 49 hemorrhagic septicemia 49 female Aedes mosquitoes 49 Strep infections 49 E Coli 49 attenuated weakened 49 Bacillus anthracis spores 49 Pathogenic bacteria 49 pathogenic organisms 49 marburg 49 Avian Bird Flu 49 Mycoplasma pneumoniae 49 waterborne pathogens 49 toxoplasma 49 blackleg 49 bluetongue 49 Toxocara 49 pandemic influenza H#N# 49 fungal spore 49 Trichophyton 49 Anaplasmosis 49 canine distemper virus 49 kurstaki 49 Salmonella enteritidis 49 virions 49 Hanta virus 49 disinfections 49 Staph aureus 49 Streptococcus pneumonia 49 airborne pathogens 49 mycobacterium tuberculosis 49 bovine tuberculosis TB 49 C. gattii 49 C. burnetii 49 Brucella 49 avian malaria 49 nonpathogenic 49 Cryptococcus gattii 49 Bonamia 49 Psittacosis 49 sporozoites 49 Resistant bacteria 49 Highly Pathogenic 49 Japanese Encephalitis JE 49 ebola virus 49 scrapie infected 49 Francisella tularensis 49 HINI virus 49 parasite Leishmania 49 H#N# Swine flu 49 enteroviruses 49 serologically 49 malarial parasites 49 serratia 49 avian flu 49 viral haemorrhagic fever 49 schistosome 49 parvo virus 49 chlamydial 49 chikungunya virus 49 bovine spongiform encephalopathy BSE 49 canine parvovirus 49 papilloma virus 49 Coccidiosis 49 Clostridium 49 O# H7 49 ESBL producing E. coli 49 coli salmonella 49 A/H#N# influenza virus 49 pseudomonas aeruginosa 49 ariakensis oysters 49 codling moth larvae 49 enteric diseases 49 monovalent vaccine 49 attenuated strain 49 Xanthomonas campestris 49 serological testing 49 cholera bacteria 49 herpesvirus 49 ecoli 49 viral hemorrhagic 49 BSE Bovine Spongiform 49 Rickettsia 49 parasitic roundworms 49 pseudorabies 49 antibiotic resistant superbug 49 waterborne microorganisms 49 S. suis 49 Giardia lamblia 49 rotaviruses 49 oxytetracycline 49 hemagglutinin gene 49 bioagent 49 Dehalococcoides 49 S. typhimurium 49 pestis 49 pox virus 49 parasite cryptosporidium 49 Chikungunya fever 49 mosquito transmitted diseases 49 aedes mosquitoes 49 drug resistant Staph 49 Anopheles mosquitoes 49 flu virus 49 toxin 49 Trypanosoma brucei 49 aspergillosis 49 intracellular bacteria 49 fungal bacterial 49 FMD vaccines 49 Lyme disease Rocky Mountain 49 PVL toxin 49 invasive alga 49 lyssavirus 49 zoonosis 49 H. pylori bacterium 49 M. leprae 49 microbiological organisms 49 aegypti 49 Citroxin 49 influenzae 49 reassortant viruses 49 pathogenic bacterium 49 Kunjin virus 49 Biosafety Level 49 M.tb 49 ZEBOV 49 epidemiologically linked 49 phytoplankton zooplankton 49 chlorine disinfectant 49 AH#N# flu 49 H#Y 49 fungal organisms 49 influenza viruses 49 anthrax bacillus 49 Parvo virus 49 Pseudomonas aeruginosa bacterium 49 T. gondii 49 viral hemorrhagic septicemia VHS 49 microscopic larvae 49 E. coli strain 49 disease brucellosis 49 anthrax tularemia 49 Smallpox vaccines 49 waterborne parasite 49 necrotic enteritis 49 staphylococcus bacteria 49 tubercle bacilli 49 H#N# avian 49 African Horse Sickness 49 cysticercosis 49 Escherichia Coli 49 molds fungi 48 influenza virus 48 scabies mite 48 bacterial contaminations 48 radio nuclides 48 HINI influenza 48 Vibrio cholerae bacterium 48 Lassa virus 48 Bartonella henselae 48 chikungunya fever 48 Listeria monocytogenes Lm 48 bioagents 48 FELV 48 paratyphoid 48 H5 strain 48 bacteria Escherichia coli 48 transmissible spongiform encephalopathy 48 full blown haemolytic 48 varicella virus 48 Respiratory Syndrome PRRS 48 toxoid 48 enteric viruses 48 parasitic worms 48 aedes mosquito 48 Avian Influenza 48 GABHS 48 Koi Herpesvirus 48 E.Coli 48 human metapneumovirus 48 Rift Valley fever 48 clostridia 48 mutated virus 48 H7 viruses 48 tapeworm infection 48 feline leukemia virus 48 Isolation wards 48 amphibian chytrid fungus 48 Staphylococcus aureus MRSA 48 superbug Clostridium difficile 48 Equine influenza 48 orf virus 48 Marburg haemorrhagic fever 48 contagious respiratory 48 WSN/# 48 infective 48 HN# strain 48 Veterinary Laboratory 48 HPAI H#N# virus 48 faecal contamination 48 Pirbright Surrey 48 bacterium E. coli 48 antibiotic resistance genes 48 Bacillus anthracis anthrax 48 merozoites 48 Enterobacter 48 contagious disease 48 A/H#N# influenza 48 melioidosis 48 domesticated birds 48 causative organisms 48 asymptomatic carriers 48 respiratory syndrome 48 meningococcus 48 bioterror weapon 48 notifiable disease 48 lymphocytic choriomeningitis virus 48 equids 48 inactivate pathogens 48 parasite 48 dual tropic 48 Hendra viruses 48 faecal oral 48 multiresistant 48 cervids 48 herpesviruses 48 fungus spores 48 pathogenic strains 48 P. syringae 48 BVD virus 48 H#N# VLP vaccine 48 Ebola Zaire virus 48 hog cholera 48 prion strains 48 Campylobacter jejuni 48 Typhimurium 48 Equine Herpes Virus 48 microbial pathogens 48 inactivated vaccine 48 anaerobic bacterium 48 spores 48 antibiotic resistant bacterium 48 Poliovirus 48 Avian botulism 48 methicillin susceptible Staphylococcus aureus 48 infectious bacterial 48 fleas lice 48 Borrelia 48 footrot 48 Bartonella 48 Yandovka 48 Variant CJD 48 Enterococcus 48 aedes aegypti mosquito 48 Nosema 48 myiasis 48 bacterial spores 48 influenza viruses circulating 48 H5 bird flu 48 ghariyals 48 avian bird flu 48 Clostridium perfringens 48 wild poliovirus type 48 SARS CoV 48 H#N# avian influenza 48 fungal pathogen 48 vast poultry flocks 48 Enterococci 48 hatching larvae 48 multidrug resistant MDR 48 Bluetongue 48 H#N# Avian Influenza 48 algal toxins 48 poliovirus 48 FMD outbreaks 48 crayfish plague 48 infectious prion 48 campylobacter salmonella 48 brevetoxin 48 migratory fowl 48 spongiform encephalopathy 48 neurona 48 neisseria 48 necrotizing pneumonia 48 H#N# influenza strain 48 P. reichenowi 48 e coli bacteria 48 Roundworms 48 atypical pneumonia outbreak 48 avian strain 48 Intestinal parasites 48 V. cholerae 48 microscopic spores 48 trypanosome 48 Staphylococcus Aureus 48 Ben Embarek 48 ectoparasites 48 staphylococcus aureus bacteria 48 tsetse 48 Equine Infectious Anemia 48 pancreatic necrosis 48 mycobacterium avium 48 blood borne pathogen 48 bee mite 48 Pathogenicity 48 BSL4 48 murine leukemia virus 48 Lysozyme 48 gypsy moth larvae 48 parasitic mite 48 organophosphate pesticide 48 bacteria Staphylococcus aureus 48 feline distemper 48 BVDV 48 eating undercooked meat 48 immunodeficiency virus 48 poultry flocks 48 foodborne bacteria 48 vaccinating poultry 48 fecally contaminated 48 anopheles 48 Cerebro Spinal Meningitis CSM 48 LLRICE# 48 urease 48 nitrofurans 48 serum antibody 48 aflotoxin 48 dengue virus 48 B. abortus 48 materials SRMs 48 monovalent oral polio vaccine 48 small strongyles 48 Aedes mosquitoes 48 malaria parasite Plasmodium falciparum 48 virulence proteins 48 phytophthora 48 A/H#N# vaccines 48 Bt# corn 48 Crimean Congo Haemorrhagic Fever 48 boar taint 48 kanamycin 48 leishmania 48 jejuni 48 Salmonella bacteria 48 furanones 48 strep bacteria 48 H7 avian flu 48 Salmonella serotype 48 Swine Flue 48 Neisseria meningitidis bacteria 48 foulbrood 48 zoonotic 48 contagious equine metritis 48 lethal H#N# avian 48 gamma interferon 47 avian influenza outbreaks 47 uncooked poultry 47 animal herdmates 47 Metarhizium anisopliae 47 e.Coli 47 noninfectious 47 Acinetobacter baumannii 47 Bilharzia 47 rinderpest 47 shigella bacteria 47 Influenza Type 47 hanta virus 47 uninfested 47 protozoan parasites 47 Staphylococcus bacteria 47 Batrachochytrium dendrobatidis 47 pneumococci 47 Clostridium difficile bacteria 47 salmonellae 47 Escherichia coli Klebsiella pneumoniae 47 H7 strain 47 feline panleukopenia 47 B. cepacia 47 Scrapie 47 M. anisopliae 47 MenB strains 47 infects humans 47 bird flu virus 47 infectious bursal disease 47 antibiotic resistant organisms 47 antibiotic residue 47 Cyclospora 47 H#N# isolates 47 cancer causer 47 faecium 47 Plum pox 47 Staphylococcus aureus infections 47 ruminant feed 47 leptospirosis 47 ramorum 47 wild fowl 47 immitis 47 bovis 47 Canine Influenza 47 foodborne botulism 47 Legionella 47 deadly Marburg virus 47 viral nucleic acids 47 USA# strain 47 S Typhi 47 spore forming bacterium Bacillus 47 bivalent oral polio vaccine 47 cocci 47 sporadic Creutzfeldt Jakob 47 H7 subtypes 47 bioscavenger 47 faecal oral route 47 legionella bug 47 dewormer 47 C. parvum 47 P. ramorum 47 inactivated strain 47 tubercle bacillus 47 E.coli O# infection 47 tularemia 47 fireblight 47 legionella 47 outer membrane proteins 47 H#N# virus 47 Mr Landeg 47 Shigella dysentery 47 coagulase negative 47 quarantined herds 47 simian virus 47 respiratory pathogens 47 Melioidosis 47 bacterium Streptococcus 47 stool specimen 47 zoonotic infections 47 migratory swans 47 Escherichia coli O# H7 47 highly pathogenic influenza 47 bovine mastitis 47 food borne pathogens 47 MDR Gram negative 47 Multidrug resistant 47 gaseous chlorine 47 wasting Creutzfeldt Jakob 47 WNv 47 A/H#N# flu virus 47 inhalational 47 Bovine Respiratory Disease 47 poultries 47 enterovirus infections 47 gamma irradiation 47 infect humans 47 infant botulism 47 poxvirus 47 larval mosquitoes 47 anthelmintics 47 S. typhi 47 Clostridium sordellii 47 Highly pathogenic 47 AH#N# influenza 47 WNV infection 47 Mycoplasma 47 mosquito salivary glands 47 inactivated influenza 47 hemolymph 47 N. meningitidis 47 scrapie 47 lethal Ebola virus 47 Pandemic H#N# 47 monocytogenes 47 Pirbright laboratories 47 MRSA Clostridium difficile 47 highly pathogenic strains 47 Streptococcus suis 47 parasitic flatworm 47 phytoplasma 47 contagious bacterial 47 anthrax toxins 47 virulent diarrheal disease 47 Creutzfeld Jakob disease 47 Plasmodium species 47 parasitic nematode 47 HIN1 virus 47 oseltamivir Tamiflu 47 H#N# avian flu 47 LPAI 47 Histoplasma capsulatum 47 hydrogen sulfide gases 47 Viral Hemorrhagic Septicemia VHS 47 Epizootic Hemorrhagic Disease 47 Crimean Congo hemorrhagic fever 47 P. falciparum malaria 47 Serratia marcescens 47 Fungal infections 47 mosquito Aedes aegypti 47 Plasmodium parasites 47 hyper virulent strain 47 Equine Herpes 47 malayi 47 Varroa destructor 47 chlortetracycline 47 Feline Leukemia 47 food borne pathogen 47 nosocomial transmission 47 genetically modified organism