9087
The effects of high intensity light emissions , produced by a novel pulsed power energization technique ( PPET ) , on the survival of bacterial populations of verocytotoxigenic Escherichia coli ( serotype 0157 : H7 ) and Listeria monocytogenes ( serotype 4b ) were investigated .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None