59
In this animal , infected with what was judged previously to be the less virulent of the two T . cruzi stocks used ( ' strain 7 ' ) , there was severe myocarditis , with myofibre degeneration , and lesions of the oesophagus .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None