Related by context. Frequent words. (Click for all words.) 57 samples 56 serum samples 54 tissue samples 53 sputum 53 swabs 51 saliva samples 50 NICD 49 fecal occult blood 49 mosquito pools 49 urine samples 49 Shigella 49 sample 49 biopsies 48 specimens 48 mouth swab 47 swab 47 DNA samples 46 saliva sample 46 E.coli 46 E. coli 46 saliva 46 E coli 45 E. coli O# [002] 44 liver biopsy 44 genetic fingerprint 44 norovirus 44 Salmonella bacteria 44 E. Coli 43 biopsy 43 H5 virus 43 campylobacter 43 chest X rays 43 coliform 43 spirometry 43 E. coli infections 43 A/H#N# virus 43 coliform bacteria 43 spinal tap 43 bacterial strains 43 chest x ray 43 S. aureus 43 strep 43 amniocentesis 43 confirmatory 43 samplings 43 histopathology 43 E Coli 42 NHANES 42 salmonella 42 Health Protection Agency 42 bacteria 42 coli 42 C. diff 42 urine sample 42 Legionella 42 needle biopsy 42 hepatitis 42 faeces 41 prostate biopsy 41 vCJD 41 salmonellosis 41 DNA sample 41 WNV 41 pap smear 41 DNA swab 41 listeria 41 Communicable Diseases 41 coronavirus 41 specific antigen 41 FOBT 41 ultrasound scans 41 H. pylori 41 e coli 41 typhoid fever 41 fecal contamination 41 Specimens 41 genotyped 41 infected 40 parvo 40 serology 40 meningococcemia 40 enterovirus 40 laboratory 40 bloodwork 40 swabbed 40 Campylobacter 40 E. coli O# H7 40 semen samples 40 cheek swab 40 cotton swab 40 H#N# 40 E. coli bacteria 40 immunohistochemistry 40 sediment samples 40 sigmoidoscopy 39 influenza 39 microscopic examination 39 infection 39 tests 39 infected mosquitoes 39 cryptosporidium