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As clinically used antibiotics target very few essential functions of mycobacterium , it is rational that identification of new targets that are essential for bacterial growth and survival can serve as starting point for designing of novel drugs to cure both drug - sensitive and resistant TB infections .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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