Birds, milk, and Campylobacter.
D000818:Animals; D002169:Campylobacter Infections / Q000453:epidemiology / Q000635:transmission*; D005506:Food Contamination; D006801:Humans; D015994:Incidence; D008892:Milk / Q000382:microbiology; D012621:Seasons; D006113:United Kingdom / Q000453:epidemiology