3493
Without treatment , 73 of 92 animals ( 80 % ) died after injection of bovine serum albumin ( BSA ) on day + 7 of pertussis immunization .
 Disease: pertussis
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: pertussis