17285
The diameter of the inhibition zone for XCGZC against Escherichia coli and Staphylococcus aureus was 17 . 2 +/- 0 . 4 and 30 . 3 +/- 0 . 6mm vs . control of 6 . 0mm .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None