24739
The high level of intrinsic and acquired antibiotic resistance of P . aeruginosa is attributable to the low permeability of its outer membrane in combination with the expression of several multidrug resistance efflux systems .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None