14747
Against Pseudomonas aeruginosa , the addition of avibactam also improves the activity of ceftazidime ( ~ fourfold MIC reduction ) .
 avibactam, ceftazidime
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 avibactam, ceftazidime