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The aqueous root extracts of Pentanisia prunelloides combined ( 1 : 1 ) with Elephantorrhiza elephantina displayed synergistic interactions ( Esh FIC values 0 . 31 - 0 . 38 ) against Staphylococcus aureus , gentamycin - methicillin resistant Staphylococcus aureus , Staphylococcus epidermidis and Candida albicans .
 Chemical: gentamycin; Chemical: methicillin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: gentamycin; Chemical: methicillin