Escherichia coli O157:H7 Ag:PrThr:Pt:Stool:Ord
escherichia coli o157:h7 ag:prthr:pt:stool:ord
Escherichia coli O157:H7 Antigen:Presence or Threshold:To identify measures at a point in time:Stool:Ordinal
escherichia coli o157:h7 antigen:presence or threshold:to identify measures at a point in time:stool:ordinal