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All calves were examined daily and fecal samples were collected three times a week for detection and enumeration of the nalidixic - acid resistant E . coli O157 .
 Anatomy: fecal samples
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: fecal samples