12554
The phage titer of Staphyloccus phage Romulus - containing powders , a member of the Myoviridae family , showed more than 2 . 5 logarithmic units reduction .
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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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