title: Outbreaks of Escherichia coli O157:H7 infections among children associated with farm visits--Pennsylvania and Washington, 2000.
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D000829:Animals, Domestic / Q000382:microbiology*; D016022:Case-Control Studies; D002648:Child; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D004927:Escherichia coli Infections / Q000453:epidemiology* / Q000382:microbiology; D019453:Escherichia coli O157 / Q000302:isolation & purification* / Q000472:pathogenicity; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D010414:Pennsylvania / Q000453:epidemiology; D012307:Risk Factors; D014861:Washington / Q000453:epidemiology; D015047:Zoonoses / Q000453:epidemiology / Q000382:microbiology