2387
The respective concentrations of Y - 754 , amoxicillin , clarithromycin , and metronidazole required to inhibit 90 % of 39 isolates of H . pylori were 0 . 05 , 0 . 39 , 6 . 25 , and 25 microg / ml , indicating the potent activity of Y - 754 , including activity against clarithromycin - and metronidazole - resistant strains .
 strains
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 strains