title: Large variation in prevalence of salmonella in laying hen flocks in EU: EFSA preliminary report.
mesh_terms: D000818:Animals; D002645:Chickens / Q000382:microbiology; D004196:Disease Outbreaks / Q000706:statistics & numerical data* / Q000662:veterinary*; D004531:Eggs / Q000382:microbiology; D005060:Europe / Q000453:epidemiology; D005062:European Union; D005260:Female; D005506:Food Contamination / Q000706:statistics & numerical data; D006801:Humans; D011159:Population Surveillance; D011201:Poultry Diseases / Q000453:epidemiology* / Q000382:microbiology*; D015995:Prevalence; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D012475:Salmonella / Q000302:isolation & purification*; D012478:Salmonella Food Poisoning / Q000453:epidemiology / Q000517:prevention & control; D012480:Salmonella Infections / Q000453:epidemiology* / Q000382:microbiology