4444
Pretreatment with lipid X was not necessary to improve survival : 16 of 17 ( 94 % ) infected and visibly ill animals that received lipid X and ticarcillin 6 h after thigh inoculation survived versus 30 of 44 ( 68 % ) control animals treated with ticarcillin alone ( P less than 0 . 0001 ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None