1560
INTRODUCTION : Ethambutol is used in the treatment of tuberculosis , which is still prevalent in Southeast Asia , and can be associated with permanent visual loss .
 Chemical: Ethambutol; Disease: tuberculosis; Disease: visual loss
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:
 Chemical: Ethambutol; Disease: tuberculosis; Disease: visual loss