4477
Immunocytochemical techniques were used to examine alterations in the expression of neuronal nitric oxide synthase ( NOS ) in bladder pathways following acute and chronic irritation of the urinary tract of the rat .
 Chemical: nitric oxide; Disease: irritation of the urinary tract
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: nitric oxide; Disease: irritation of the urinary tract