5795
To address this , studies have been performed in mice and macaques using Chinese Hamster Ovary cells ( CHO ) - derived recombinant ( r ) BChE delivered by the pulmonary route , to examine whether the deposition of both macaque ( Ma ) and human ( Hu ) rBChE administered as aerosols ( aer ) favored the creation and retention of an efficient protective " pulmonary bioshield " that could scavenge incoming ( inhaled ) OPs in situ thereby preventing entry into the circulation and inhibition of plasma BChE and AChE on red blood cells ( RBC - AChE ) and in cholinergic synapses .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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