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While it is clear that much fundamental research remains to be done , potentially important therapeutic options include narrow spectrum antibiotics , novel probiotics , dietary interventions and more radical techniques such as faecal transplantation , all of which aim to suppress clinical dysbiosis , restore intestinal microbiota diversity and improve host health .
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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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