22489
Chagas disease ( human American trypanosomiasis ) , which is caused by the protozoan parasite Trypanosoma cruzi , is responsible for numerous deaths each year ; however , established treatments for the disease are limited .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None