1638
Immuno - cytochemistry , using antisera against Campylobacter jejuni , showed that the positive staining in altered epithelial cells were restricted to intracellular organisms having a structure resembling Campylobacter spp .
 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