8550
To combat the perceived threat of brucellosis transmission to cattle , national park personnel regularly corral bison herds back into the park when they venture outside of the area 's borders .
 disease: brucellosis
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 disease: brucellosis