4591
Incubating purified BTV - 1 with C . sonorensis saliva proteins also increased their infectivity for KC cells ~ 10 fold , while infectivity for BHK cells was reduced by 2 - 6 fold .
 KC cells, BHK cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 KC cells, BHK cells